What Brain Type Are Psychopaths? Exploring the Neurological Underpinnings of Psychopathy

Imagine this: you’re in a high-stakes negotiation, and across the table sits someone utterly unfazed by pressure, someone who can read your vulnerabilities with unnerving precision, and then expertly leverage them without a hint of remorse. This isn’t just a skilled negotiator; it might be an individual exhibiting traits associated with psychopathy. The question then naturally arises: What brain type are psychopaths? It’s a question that sparks curiosity, fear, and a deep desire to understand the biological underpinnings of such complex and often destructive behavior. For years, researchers have been delving into the intricate wiring of the psychopathic brain, moving beyond mere behavioral descriptions to explore the neurological architecture that may predispose individuals to these characteristics.

My own encounters, like many, have often been indirect – through news reports, psychological studies, or even observing individuals who, while not clinically diagnosed, exhibit certain unempathetic tendencies that feel… different. There’s a distinct lack of emotional resonance, a chilling detachment that sets them apart. It’s this observable difference that compels us to ask about the *why*, and increasingly, science points to the brain as a significant piece of that puzzle. Understanding the brain type of psychopaths isn’t about labeling or excusing behavior; it’s about gaining critical insights that can inform prevention, intervention, and a more nuanced societal understanding.

The Core Question: What Brain Type Are Psychopaths?

At its heart, the question of what brain type are psychopaths boils down to identifying consistent neurological differences in individuals who exhibit the core traits of psychopathy: a profound lack of empathy, manipulativeness, superficial charm, impulsivity, and a disregard for social norms and the rights of others. It’s not a single “type” in the way we might think of a specific computer processor. Instead, research suggests a constellation of differences affecting various brain regions and their interconnectedness. These differences appear to impact how psychopaths process emotions, make decisions, and interact with the world around them.

Instead of a singular, monolithic “psychopathic brain,” think of it as a network of interconnected systems that operate with a distinct functional signature. These differences are not necessarily about having “less” of something, but rather about *how* certain brain areas are wired and how they communicate with each other. This leads to a fundamentally altered perception and response to stimuli, particularly those involving social and emotional cues.

Deconstructing the Psychopathic Brain: Key Areas of Difference

Scientific inquiry, employing advanced neuroimaging techniques like fMRI (functional Magnetic Resonance Imaging) and PET (Positron Emission Tomography) scans, has illuminated several key areas of the brain that frequently show differences in individuals diagnosed with or exhibiting high levels of psychopathic traits. These regions are not isolated; they form intricate circuits responsible for a wide range of cognitive and emotional functions.

The Amygdala: The Seat of Fear and Emotion Processing

Perhaps one of the most consistently implicated areas in psychopathy research is the amygdala. This almond-shaped structure deep within the temporal lobes plays a crucial role in processing emotions, especially fear and threat detection. In individuals with psychopathy, studies often reveal reduced amygdala volume and, more importantly, diminished activity in response to emotionally charged stimuli, particularly those evoking fear or distress in others.

Reduced Amygdala Activity and Emotional Deficits: Think about encountering a frightening situation. Your amygdala would typically light up, signaling danger and triggering a fear response. For individuals with psychopathy, this response is often blunted or absent. This isn’t to say they don’t experience fear themselves, but rather that they seem to have a diminished capacity to recognize and respond to fear cues in others. This emotional deficit is fundamental to their inability to empathize, as empathy often hinges on vicariously experiencing the emotions of another. It’s like trying to understand a color you’ve never seen; the neural pathways for that experience are simply not as robust.

Consequences of Amygdala Dysfunction: This reduced emotional processing can have profound consequences. It might explain why individuals with psychopathy often appear fearless and have a higher tolerance for risk. If the brain doesn’t adequately signal danger or distress, actions that would normally be inhibited by fear can proceed unchecked. Furthermore, this diminished capacity to register negative emotions in others contributes to their callousness and lack of remorse when causing harm. They may intellectually understand that their actions are causing pain, but they don’t *feel* it in the same way a neurotypical individual would.

The Prefrontal Cortex: The Executive Control Center

The prefrontal cortex (PFC), the most forward part of the brain, is the executive control center. It’s responsible for complex cognitive behaviors such as planning, decision-making, working memory, impulse control, and social behavior. Research has identified several functional and structural differences within the PFC in individuals with psychopathy.

Orbitofrontal Cortex (OFC) and Ventromedial Prefrontal Cortex (vmPFC): Decision-Making and Emotional Regulation

Specific subregions of the PFC, particularly the orbitofrontal cortex (OFC) and the ventromedial prefrontal cortex (vmPFC), are critically involved in integrating emotion and cognition to guide decision-making, especially in social contexts. These areas help us evaluate the potential consequences of our actions, consider social norms, and regulate our emotional responses.

Impaired Decision-Making and Risk Assessment: In psychopathy, the OFC and vmPFC often show reduced activity and connectivity. This impairment can lead to poor decision-making, a tendency to make choices that are detrimental in the long run, and a failure to learn from negative consequences. For instance, a neurotypical person might hesitate before engaging in a risky behavior after a negative outcome. In contrast, someone with psychopathic traits might repeat the behavior, as their PFC is less adept at weighing the emotional cost or potential negative repercussions. This is akin to having a flawed internal compass that doesn’t accurately point towards long-term well-being.

Difficulty with Emotional Regulation: The vmPFC also plays a key role in emotional regulation. When this area is compromised, individuals may struggle to manage their emotions, leading to outbursts of aggression or impulsivity. While psychopathy isn’t solely about aggression, this difficulty in controlling impulses and emotional states can certainly be a contributing factor to destructive behaviors.

Dorsolateral Prefrontal Cortex (dlPFC): Cognitive Control and Planning

While the OFC and vmPFC are more involved in emotional aspects of decision-making, the dorsolateral prefrontal cortex (dlPFC) is crucial for cognitive control, planning, and working memory. Some studies suggest alterations in the dlPFC in psychopathy, which might contribute to difficulties in inhibiting inappropriate responses and planning complex, goal-directed behaviors that align with social expectations.

The Insula: Interoception and Empathy

The insula is another vital region involved in interoception (the sense of the physiological state of one’s own body) and is deeply connected to emotional awareness and empathy. It helps us feel our emotions and understand the emotions of others by simulating their bodily states.

The Insula’s Role in Empathic Resonance: When we witness someone in pain, our insula activates, mirroring that distress to some extent. This “feeling with” is a cornerstone of empathy. Research suggests that individuals with psychopathy often exhibit reduced insula activation, particularly when observing others in distress. This neural dampening may prevent them from experiencing the visceral, somatic component of empathy, making it harder to truly comprehend or care about the suffering they inflict.

Interoceptive Deficits: Beyond empathy, the insula’s role in interoception might also be compromised. This could contribute to a general detachment from bodily sensations and emotions, further fueling a sense of being disconnected from themselves and others. It’s like being a detached observer of one’s own internal landscape.

The Anterior Cingulate Cortex (ACC): Conflict Monitoring and Error Detection

The anterior cingulate cortex (ACC) is involved in monitoring cognitive conflicts, detecting errors, and signaling the need for a response or behavioral adjustment. It’s the brain’s “uh-oh” signal, alerting us when something is wrong or when our current course of action isn’t working.

Blunted Error Signals: Studies have shown reduced ACC activity in individuals with psychopathy, particularly in response to errors or negative feedback. This could explain why they often fail to learn from their mistakes and repeatedly engage in behaviors that have led to negative consequences for themselves or others. The neural “alarm bell” simply doesn’t ring as loudly, if at all, when they transgress societal boundaries or face punishment.

Impact on Social Cognition: The ACC also plays a role in social cognition and decision-making. A less responsive ACC might contribute to the antisocial behavior seen in psychopathy by reducing the internal signaling that something is amiss in their social interactions or rule-breaking activities.

The Temporoparietal Junction (TPJ): Theory of Mind and Perspective-Taking

The temporoparietal junction (TPJ) is a critical hub for “theory of mind” – the ability to attribute mental states (beliefs, intentions, desires, emotions) to oneself and others. It’s essential for understanding that others have perspectives different from our own.

Challenges in Understanding Others’ Mental States: Some research suggests that individuals with psychopathy may show atypical activation in the TPJ, particularly when tasks involve understanding intentions or beliefs of others. This can manifest as a reduced ability to “put themselves in someone else’s shoes” or to grasp the psychological impact of their actions on others. While they may be able to intellectually understand rules, their capacity to intuitively grasp the mental states of others can be impaired.

The Brain’s Connectivity: The Network Matters

It’s crucial to understand that these brain regions don’t function in isolation. The way they are interconnected and communicate with each other is just as important as the activity within individual regions. Research in psychopathy increasingly focuses on “connectomics” – the study of brain connectivity.

Dysfunctional Network Integration: Studies indicate that individuals with psychopathy often have disrupted connectivity between different brain networks. For example, there might be reduced communication between areas involved in emotional processing (like the amygdala) and areas involved in executive control (like the prefrontal cortex). This impaired communication can lead to a disconnect between understanding a situation emotionally and making a reasoned, socially appropriate decision.

A “Disconnected” Brain? This network-level disruption has led some researchers to conceptualize the psychopathic brain not as a collection of damaged parts, but as a system that is wired differently, leading to altered information processing. It’s like having a sophisticated computer with faulty wiring between its core components; it might still function, but its outputs and problem-solving abilities will be significantly compromised, especially in complex social scenarios.

Are There Different “Brain Types” Within Psychopathy?

While the term “psychopathy” is used as a singular diagnostic construct (often associated with the Psychopathy Checklist-Revised, or PCL-R), it’s increasingly recognized that there might be variations in the underlying neurological profiles. Not everyone with psychopathic traits will have the exact same brain differences. This is a complex area of ongoing research, but some emerging ideas suggest:

• “Hot” vs. “Cold” Psychopathy: Some researchers differentiate between “hot” and “cold” psychopathy. “Cold” psychopaths are thought to have more pronounced deficits in fear processing and emotional responsiveness (e.g., amygdala dysfunction). “Hot” psychopaths, on the other hand, might exhibit more emotional reactivity, aggression, and impulsivity, potentially with different patterns of prefrontal cortex involvement.
• Focus on Specific Traits: Different psychopathic traits might be associated with distinct neurological markers. For instance, the lack of fear could be strongly tied to amygdala function, while manipulativeness and superficial charm might involve more complex prefrontal cortex and social cognition network differences.

It’s important to note that these are still evolving concepts. The current understanding leans towards a spectrum of differences rather than distinct, mutually exclusive “brain types.” The variability observed might reflect different combinations of genetic predispositions, environmental influences, and developmental trajectories that shape the brain.

Beyond Neuroimaging: Other Contributing Factors

While neuroimaging provides invaluable insights into the brain structures and functions associated with psychopathy, it’s not the whole story. Psychopathy is considered a complex interplay of:

• Genetics: Heritability estimates for psychopathic traits are significant. Certain gene variants, particularly those affecting neurotransmitter systems like dopamine and serotonin, are being investigated for their role in moderating emotional and behavioral responses.
• Environment: Early life experiences, such as childhood trauma, abuse, neglect, and inconsistent parenting, can significantly impact brain development and contribute to the emergence of psychopathic traits, especially in genetically predisposed individuals. Environmental factors can either exacerbate or mitigate genetic vulnerabilities.
• Developmental Trajectory: The development of the brain is a long process. The timing and nature of insults or altered developmental pathways during critical periods of brain maturation can have lasting effects on neural circuits involved in social cognition and emotional regulation.

Therefore, asking what brain type are psychopaths is best answered by understanding that it’s not a single, static entity but a dynamic outcome of biological and environmental interactions that shape brain development and function.

Can the Psychopathic Brain Change?

This is a critical and often debated question. Given the neurological differences observed, can the brain “rewire” itself sufficiently to overcome psychopathic tendencies? The current scientific consensus is that while significant change is challenging, it’s not entirely impossible, especially with intensive, targeted interventions.

The Challenge of Neuroplasticity: Neuroplasticity, the brain’s ability to reorganize itself by forming new neural connections, is a lifelong process. However, the fundamental differences in neural architecture and connectivity observed in psychopathy present a considerable hurdle. It’s like trying to reroute major highways that were built with a fundamentally different blueprint. The existing pathways are deeply ingrained.

Intervention Strategies: Current interventions for individuals with psychopathic traits often focus on:

• Cognitive Behavioral Therapy (CBT): While traditional CBT might be less effective for deeply ingrained psychopathic traits, modified approaches that focus on skill-building (e.g., anger management, impulse control) and understanding consequences are being explored.
• Empathy Training (with caveats): Directly teaching empathy is incredibly difficult, given the underlying neurological deficits. However, some approaches aim to teach individuals to recognize and label emotions in others, and to intellectually understand the impact of their actions, rather than relying on affective empathy.
• Focus on Risk Reduction: For individuals with high psychopathy, interventions often shift from trying to “cure” the psychopathy to managing and mitigating the harmful behaviors associated with it, such as preventing reoffending.

It’s vital to have realistic expectations. While interventions can sometimes lead to a reduction in antisocial behaviors and improved functioning, they rarely eliminate the core deficits in empathy and emotional processing associated with psychopathy. The “brain type” characteristics are deeply embedded.

What Brain Type Are Psychopaths? A Concise Answer

To concisely answer what brain type are psychopaths: Individuals exhibiting psychopathic traits typically display a distinct pattern of neurological differences, characterized by reduced activity and connectivity in areas crucial for emotional processing (especially fear and empathy, like the amygdala and insula) and executive functions (like the prefrontal cortex, particularly the OFC and vmPFC). This results in a brain that processes social and emotional information differently, often leading to a reduced capacity for empathy, impaired decision-making, and a diminished response to punishment or distress signals. It’s less a singular “type” and more a network-level alteration.

Frequently Asked Questions About the Psychopathic Brain

The complexities surrounding psychopathy and its neurological basis naturally lead to many questions. Here, we address some of the most common and important ones.

How is the brain of a psychopath different from a neurotypical brain?

The brain of an individual with psychopathic traits differs in several key ways from that of a neurotypical person. Neuroimaging studies consistently highlight differences in the structure and function of several brain regions and their interconnectedness.

First, there’s often a noticeable reduction in the size and activity of the amygdala. The amygdala is a critical part of the brain’s limbic system, responsible for processing emotions, particularly fear and threat detection. When individuals with psychopathy encounter situations that would typically evoke fear or distress, their amygdala shows significantly less activation compared to neurotypical individuals. This blunted response to fear is believed to be a core reason for their lack of caution and their reduced ability to recognize or respond to the fear signals in others, which is fundamental to empathy.

Second, the prefrontal cortex (PFC), the brain’s command center for executive functions like decision-making, impulse control, and social behavior, also exhibits differences. Specifically, subregions like the orbitofrontal cortex (OFC) and the ventromedial prefrontal cortex (vmPFC) are often implicated. These areas are vital for integrating emotional information with cognitive processes to make sound judgments and understand social consequences. Reduced activity and impaired connectivity in these regions can lead to poor decision-making, impulsivity, and a failure to learn from negative experiences. It’s as if the brain’s internal “risk assessment” and “social consequence” modules are not functioning optimally.

Third, the insula, which plays a role in interoception (sensing the body’s internal state) and is crucial for empathy and emotional awareness, also shows atypical functioning. Reduced insula activation can contribute to a diminished capacity to feel what others are feeling, further hindering empathic resonance. It’s like being unable to truly connect with the emotional experience of another person on a visceral level.

Finally, the anterior cingulate cortex (ACC), involved in error detection and conflict monitoring, often shows reduced activity. This might explain why individuals with psychopathy frequently repeat harmful behaviors without learning from their mistakes; their brain’s “warning system” for errors and negative outcomes is less sensitive.

Beyond individual brain regions, research increasingly points to disrupted connectivity between these areas. The communication pathways between emotional centers and executive control centers may be less efficient, leading to a disconnect between emotional understanding and behavioral response. So, it’s not just about isolated regions but the way the entire network operates as a system. This network-level difference creates a fundamentally distinct way of processing the world, particularly social and emotional information.

Why do psychopaths lack empathy, and how is this reflected in their brain activity?

The lack of empathy in psychopaths is a defining characteristic, and it’s deeply rooted in their brain’s functioning, particularly concerning how they process emotions and understand others’ mental states. The neurological basis for this deficit is multifaceted, involving several key brain structures and their interactions.

As mentioned, the amygdala is central to this. Empathy often requires us to feel a resonance with another person’s emotional state. When someone is suffering, a neurotypical person’s amygdala activates, signaling distress and allowing for vicarious emotional experience. In individuals with psychopathy, this amygdala response is often muted. They may intellectually understand that someone is sad or in pain, but they don’t *feel* it in the same visceral, emotional way. This “affective empathy” deficit is a major contributor to their callousness and their ability to inflict harm without apparent remorse.

The insula also plays a significant role. It connects us to our own bodily feelings and helps us simulate the bodily states of others, which is crucial for empathic understanding. Reduced insula activity in psychopaths means they may have a diminished capacity to register the physical manifestations of emotions, both in themselves and in others. This contributes to a general detachment from emotional experiences and makes it harder to tune into the suffering of others.

Furthermore, the prefrontal cortex (PFC), particularly the vmPFC and OFC, is involved in applying emotional knowledge to social decision-making. This region helps us understand the emotional impact of our actions on others and regulate our own emotional responses to maintain social harmony. When these areas are compromised, individuals may struggle to translate emotional cues into appropriate social behavior or to appreciate the emotional consequences of their deeds. They might understand the rules of social interaction but lack the emotional “glue” that makes those rules feel intrinsically important.

The temporoparietal junction (TPJ), as discussed, is vital for “theory of mind” – the ability to infer the mental states of others. Some evidence suggests atypical TPJ function in psychopathy, which could impair their ability to fully grasp the intentions, beliefs, and feelings of others, further limiting their capacity for deep, affective empathy. They might be skilled at cognitive empathy (intellectually understanding someone’s perspective) but lack the crucial emotional component.

In essence, their brain is not wired to generate the emotional feedback loops that underpin empathy. It’s a significant neurological difference that impacts their social cognition and their moral compass. It’s not simply a choice to be unempathetic; it’s a fundamental difference in how their brain processes and generates emotional responses, particularly those related to others’ distress.

What are the implications of these brain differences for diagnosis and treatment?

The growing understanding of the neurological underpinnings of psychopathy has profound implications for both diagnosis and treatment, though it also presents significant challenges.

Diagnostic Implications: While neuroimaging is not currently used as a standalone diagnostic tool for psychopathy (diagnosis is typically based on clinical assessment, interviews, and psychometric measures like the PCL-R), neurological findings can bolster the validity and reliability of existing diagnostic methods. Identifying specific neural markers could, in the future, aid in earlier identification or differentiate subtypes of psychopathy. It provides a biological basis for the observed behavioral patterns, moving beyond purely symptomatic descriptions. For instance, understanding the neurobiological correlates of superficial charm versus impulsivity might lead to more refined diagnostic subcategories or treatment approaches tailored to specific presentations.

Treatment Challenges: The primary implication for treatment is that psychopathy is not a condition that is easily “cured” through conventional therapeutic means. The neurological differences, particularly in emotional processing and fear conditioning, are deeply ingrained. Standard psychotherapy, which relies heavily on emotional insight and the capacity for remorse and guilt, often has limited success.

Traditional approaches may need significant modification. For example, interventions might focus less on fostering deep emotional empathy (which is neurologically challenging) and more on teaching cognitive strategies. This could involve:

• Skill-building: Training in impulse control, anger management, and problem-solving skills can help manage some of the more destructive behavioral manifestations.
• Consequence-based learning: Utilizing approaches that emphasize understanding and internalizing the real-world consequences of their actions, rather than relying on guilt or remorse.
• Risk management: In forensic settings, a significant focus is placed on managing the risk of reoffending. This involves behavioral interventions aimed at reducing violence and recidivism, even if the core psychopathic traits remain.
• Targeted interventions: Emerging research is exploring how to leverage neuroplasticity in specific circuits, though this is still in its nascent stages. Some studies are investigating whether interventions that specifically target amygdala or prefrontal cortex function might offer some benefit, but this is highly experimental.

It’s crucial to understand that for individuals with high levels of psychopathy, the goal of treatment often shifts from fundamental personality change to behavioral modification and risk reduction. The neurological differences suggest that a “one-size-fits-all” approach to therapy is unlikely to be effective. Tailoring interventions based on the specific profile of neurological and behavioral characteristics is likely the most promising path forward.

Does this mean psychopaths are born this way?

The question of nature versus nurture is central to understanding psychopathy. While the neurological differences observed in the psychopathic brain suggest a strong biological component, it’s more accurate to say that individuals with psychopathy are likely born with a predisposition that is then shaped by their environment and experiences.

Genetic Predisposition: Heritability studies suggest that genetic factors play a significant role in the development of psychopathic traits. Certain gene variants can influence the development and function of neurotransmitter systems (like dopamine and serotonin) and brain structures involved in emotional regulation and impulse control. This means some individuals may be born with a brain that is neurologically more vulnerable to developing these traits.

Environmental Influence: However, genetics alone does not determine destiny. Environmental factors are crucial in the development of psychopathy. Adverse childhood experiences, such as abuse, neglect, inconsistent parenting, exposure to violence, and early institutionalization, can interact with genetic vulnerabilities. These experiences can profoundly impact brain development during critical periods, exacerbating pre-existing predispositions and contributing to the emergence of psychopathic behaviors. For example, a child with a genetic predisposition for impulsivity might develop severe psychopathic traits if exposed to severe neglect or trauma. Conversely, a supportive and structured environment might mitigate some of the risks in a predisposed individual.

Gene-Environment Interaction: The most compelling current understanding is that psychopathy arises from a complex interplay between genetic vulnerabilities and environmental influences. It’s not a simple case of “born this way” or “made this way.” It’s more likely a scenario where certain individuals are born with a biological “blueprint” that makes them more susceptible, and these vulnerabilities are then activated, amplified, or sometimes (though less commonly) mitigated by their life experiences. Therefore, while the neurological underpinnings are significant, they are not necessarily fixed at birth and can be influenced by the developmental trajectory.

Can psychopathy be detected in children?

Detecting psychopathy in children is a complex and sensitive issue. While the traits associated with adult psychopathy can sometimes be observed in children as “conduct problems” or “callous-unemotional traits,” it’s crucial to distinguish between childhood behavioral issues and a diagnosis of psychopathy. The term “psychopathy” is generally reserved for adults, as personality is still developing in childhood and adolescence.

Callous-Unemotional (CU) Traits: Researchers often refer to “callous-unemotional (CU) traits” when discussing these characteristics in children. These include a lack of empathy, lack of guilt, shallow affect (limited emotional expression), and disregard for others. Children exhibiting high levels of CU traits, especially when combined with persistent aggressive and antisocial behaviors (classified as conduct disorder), are at a higher risk of developing psychopathy in adulthood compared to children with conduct disorder alone.

Neurological Correlates in Children: Studies have begun to explore the neurological correlates of CU traits in children. Similar to adults, children with CU traits have shown differences in amygdala function and connectivity with the prefrontal cortex. For instance, they might display reduced amygdala responses to fearful faces and altered patterns of brain activity during tasks assessing emotional understanding. This suggests that the neurological underpinnings may emerge early in development.

Importance of Early Intervention: Identifying children with high CU traits and associated behavioral problems is important not for labeling them as “psychopaths” but for initiating early intervention. These interventions can be crucial for mitigating the development of more severe antisocial behaviors and psychopathic traits later in life. They often focus on:

• Parenting support programs: Teaching parents effective strategies for managing challenging behaviors, setting boundaries, and fostering prosocial behavior.
• Social skills training: Helping children learn to recognize and respond to social cues, understand emotions, and develop more empathic interactions.
• Targeted therapies: Addressing specific behavioral issues and promoting emotional regulation.

The goal is not to “cure” a child of potential psychopathy but to nurture their development in a way that encourages more prosocial behaviors and reduces the likelihood of severe, persistent antisocial trajectories. It’s about providing the support and guidance needed to foster healthier emotional and social development.

Conclusion: Towards a Deeper Understanding of the Psychopathic Brain

The question, what brain type are psychopaths, doesn’t have a simple, singular answer. Instead, it points to a complex tapestry of neurological differences that impact how individuals perceive, process, and react to the world. It’s characterized by altered emotional circuitry, particularly in the amygdala, insula, and prefrontal cortex, leading to profound deficits in empathy and impaired executive functions. This unique neural architecture, shaped by a combination of genetic predispositions and environmental influences, creates a distinct “brain type” that underlies the observable behaviors associated with psychopathy.

Understanding these differences is not about demonizing or excusing; it’s about advancing scientific knowledge, improving diagnostic precision, and developing more effective, albeit challenging, interventions. As research continues to unravel the intricate connections within the psychopathic brain, we move closer to a more comprehensive and compassionate understanding of this complex human condition. The journey is far from over, but each neuroimaging scan, each behavioral study, brings us nearer to a more complete picture of what makes the psychopathic brain tick.