Subgenual cingulate cortex and personality in chimpanzees (Pan troglodytes)
Barbara J Blatchley1, William D Hopkins
1Department of Psychology, Agnes Scott College, Decatur, Georgia 30030, USA. bblatchley@agnesscott.edu
Cognitive, Affective & Behavioral Neuroscience
|September 1, 2010
Summary
Chimpanzee brain structure, specifically gray matter in the subgenual cingulate cortex (SGCC), correlates with personality traits like dominance and conscientiousness. This suggests a biological basis for personality in apes.
Area of Science:
- Neuroscience
- Primatology
- Behavioral Biology
Background:
- Animal behavior is characterized by consistent individual differences in personality traits.
- The subgenual cingulate cortex (SGCC) is implicated in emotional regulation and social behavior, potentially underlying personality.
Purpose of the Study:
- To investigate the relationship between chimpanzee personality traits and the structural characteristics of the subgenual cingulate cortex (SGCC).
- To explore potential neural correlates of personality in a non-human primate model.
Main Methods:
- Magnetic Resonance Imaging (MRI) was used to assess the percentage of gray matter (PGM) and asymmetry in the SGCC of 74 chimpanzees.
- Personality traits (dominance, extraversion, conscientiousness, agreeableness) were measured using established assessment methods.
- Statistical analyses were performed to correlate neuroanatomical measures with personality factors.
Main Results:
- Female chimpanzees exhibited significantly higher PGM in the SGCC compared to males.
- In male chimpanzees, PGM in the SGCC was significantly correlated with dominance and conscientiousness.
- A population-level leftward asymmetry was observed in the SGCC across the study group.
Conclusions:
- The findings suggest that the SGCC plays a role in the biological foundation of personality in chimpanzees.
- Sex differences in SGCC structure may contribute to observed sex differences in personality traits.
- This study provides evidence for the neuroanatomical basis of personality in non-human primates.
Related Concept Videos
01:29Personality Theory by Eysenck and Eysenck
Hans and Sybil Eysenck developed a widely recognized theory of personality, which emphasizes the role of temperament and genetically based differences in shaping individual traits. Their theory posits that biological factors primarily determine personality and can be understood through two main dimensions: extroversion/introversion and neuroticism/stability.
In the extroversion/introversion dimension, highly extroverted people are sociable, outgoing, and easily connect with others. In contrast,...
In the extroversion/introversion dimension, highly extroverted people are sociable, outgoing, and easily connect with others. In contrast,...
01:23Implicit Personality Theories
Implicit personality theory explains how individuals make assumptions about the relationships between personality traits, behaviors, and character types. When people learn that someone possesses a particular trait, they tend to infer the presence of other related characteristics, forming a cohesive impression. This cognitive shortcut plays a crucial role in social interactions and interpersonal judgments.Central Traits and Their InfluenceSolomon Asch's seminal 1946 study highlighted the power...
01:30Social Cognitive Perspective on Personality
Social cognitive perspectives on personality emphasize the importance of conscious awareness, beliefs, expectations, and goals in shaping behavior. These perspectives incorporate behaviorist principles, such as learning through reinforcement and conditioning, but extend beyond them by highlighting human reasoning and planning. Unlike traditional behaviorist views, social cognitive theory focuses on how individuals reflect on their past experiences and plan for future outcomes by considering...
01:19The Behavioral Perspective on Personality
Behaviorists view personality as primarily shaped by environmental reinforcements and consequences. According to this perspective, behavior is influenced by external stimuli, and individuals adjust their actions based on rewards and punishments. Over time, learning histories — accumulated patterns of reinforcement — play a significant role in shaping personality. Behaviors that lead to positive outcomes are reinforced, while those resulting in negative outcomes are diminished. Radical...
01:26Cultural Influences on Personality
Individualist and collectivist cultures emphasize different core values, shaping personality in distinct ways. In individualist cultures, such as those in the United States, England, and Australia, people prioritize independence, competition, and personal achievement. These societies tend to promote self-focused traits, with individuals often reporting higher levels of self-esteem. In contrast, collectivist cultures, commonly found in regions like Asia, Africa, and South America, emphasize...
01:29Dark Triad and Person Perception
Person perception is influenced by both external behaviors and the observer’s internal characteristics, including personality traits. Individuals with dark personality traits, comprising psychopathy, Machiavellianism, and narcissism — collectively known as the dark triad – exhibit manipulative and exploitative tendencies in social contexts. These traits affect how they perceive others and how they are perceived.The Role of Dark Personality Traits in Person PerceptionBlack et al. (2014) explored...