Neural & Hormonal Mechanisms Flashcards
What does the Amygdala do?
It evaluates the emotional importance of sensory information and prompts an appropriate response.
It is also linked to moderating testosterone levels.
What happens if the amygdala is removed?
No aggression is shown.
What happens if the amygdala is damaged?
Could raise testosterone making aggression more likely.
What is the Limbic system?
It co-ordinates behaviors which satisfies emotional and motivational urges such as fear and aggression.
What is the Limbic system made out of?
The Amygdala and the Hippocampus.
What does the Hippocampus do?
It forms long term memories which allow animals to compare current threats to similar experiences in the past.
What happens if the Hippocampus is damaged?
The Amygdala may react inappropriately; possibly through aggression.
What is Serotonin?
It is a neurotransmitter which has been linked to aggression.
What does Serotonin do?
It inhibits the Amygdala, which in turn inhibits emotional responses such as fear and aggression less likely.
What are neurotransmitters?
Chemicals that allow impulses from one part of the brain travel to another.
What is the Serotonin Deficiency Theory?
Having low levels of Serotonin removes this inhibitory effect; resulting in less control over impulsive aggressive behaviours.
What is Testosterone?
It is an Androgen, a primarily male hormone, which produces male characteristics such as status seeking domineering aggression.
Outline Dabbs’ study into testosterone?
Measured salivary testosterone in violent and non-violent criminals. Those with a history of mostly violent crimes were found to have the highest levels of testosterone.
What is the link between aromatase and testosterone.
Aromatase metabolises testosterone and is found in the lymbic region of the brain.
What happens if aromatase levels are reduced?
Reduced level of aromatase means that there would not be enough enzymes to activate the testosterone - resulting in lower chances of showing aggression.
