Neural And Hormonal Mechanisms

Question 1

What are the two types of neural influences in aggression

Answer 1

1. The limbic system
2. Serotonin

Question 2

What is the limbic system

Answer 2

A system of subcortical structures in the brain associated with regulating emotional behaviour

Question 3

Which key structures make up the limbic system

Answer 3

1. Amygdala
2. Hippocampus
3. Hypothalamus

Question 4

What is serotonin

Answer 4

A neurotransmitters which has inhibitory effects in the brain and can be implicated in different behaviours such as aggression, eating behaviour and sleep

Question 5

Explain how serotonin can influence aggression

Answer 5

Reduced serotonin levels removes its inhibitory effect and leads to more impulsive and aggressive behaviour

Question 6

What is a hormonal influence in aggression

Answer 6

Testosterone

Question 7

What is testosterone

Answer 7

A hormone produced mainly by the testes in males, associated with development of male secondary sexual characteristics, but also implicated in aggression

Question 8

State a study which shows support for the role of the amygdala on aggression

Answer 8

Gospic at all. (2011)- fMRI scan whilst plating Ultimatum Game- heightened response in amygdala when participants rejected unfair offers

Question 9

State a study which shows support for the role of serotonin in aggression

Answer 9

Mann et al. (1990)- when given drug which reduces serotonin levels they had increased aggression scores on a questionnaire

Question 10

State two studies which show support for the role of testosterone in aggression

Answer 10

1. Dolan et al. (2001) - positive correlation between testosterone levels and aggressive behaviours in UK offenders
2. Dabbs et al. (1987)- violent criminals had higher levels of testosterone in their saliva