ASPD ASPD Neurobiological and Genetic Factors

Question 1

Which brain region is most consistently implicated in the reduced emotional processing seen in individuals with ASPD?

Accepted Answer

Amygdala

Answer

The amygdala shows reduced volume and activity in individuals with ASPD, contributing to deficits in fear conditioning and emotional empathy.

Question 2

Twin studies on antisocial behavior in ASPD suggest that heritability accounts for approximately what percentage of variance?

Accepted Answer

40-60%

Answer

Twin studies consistently estimate that genetic factors account for roughly 40–60% of the variance in antisocial behavior associated with ASPD.

Question 3

Which neurotransmitter system is most strongly associated with impulsivity and aggression in ASPD?

Accepted Answer

Serotonin

Answer

Low serotonin activity is strongly linked to impulsive aggression and poor behavioral inhibition characteristic of ASPD.

Question 4

What does neuroimaging research consistently show about prefrontal cortex volume in individuals diagnosed with ASPD?

Accepted Answer

Reduced gray matter volume

Answer

Studies demonstrate significantly reduced prefrontal cortex gray matter in ASPD, which is associated with impaired decision-making and impulse control.

Question 5

The 'callous-unemotional' trait in youth that predicts adult ASPD is most closely linked to dysfunction in which biological system?

Accepted Answer

Mirror neuron and empathy circuits

Answer

Callous-unemotional traits are linked to reduced responsivity in the mirror neuron system and empathy-related circuits, particularly the amygdala–ventromedial prefrontal loop.

(ASPD) Sociopath & Antisocial Personality Disorder Test Practice Test

(ASPD) Sociopath & Antisocial Personality Disorder Test Practice Test

ASPD ASPD Neurobiological and Genetic Factors