BAB L21 Flashcards
What is emotion?
Affect, combination of psychological and physiological responses to a stimulus
Why have emotion?
Helps with communication and aids memory. Evidence for important by motor cortex homunculus which more of brain has control over bc face movements portray emotional state.
What underpins emotions?
A circuit; a network of neurons and various bits of brain get involved depending on the emotion we focusing on
Which structures in the brain are involved in emotion?
Neocortex, cingulate gyrus, amygdala, hippocampus, anterior thalamic nuclei, thalamus and hypothalamus.
What happens when you have lesions in the anterior thalamus?
Spontaneous laughing/crying
What happens when you have lesions to neocortex?
Personality changes: impulsive, prone to emotional outbursts, angry state, inappropriate behaviour.
Where is pleasure centre?
Orbitofrontal in pre-frontal
How is the hippocampus involved?
Memory, emotion, and found decreased volume in chronic depression.
How are the amygdala involved?
In temporal lobes, bilateral and the size of almonds.
Involved in fear and emotional memory, which helps with interpretation of sensory input. Remember something is dangerous so will avoid in future.
Describe the revised circuitry of Papez.
look at diagram
Clinical relevance of dysfunctional amygdala?
Anxiety disorder, PTSD, depression, autism, aggression?
What is thought to cause emotional disorders?
Circuitry dysfunction?
In the past psychosurgery
DBS and depression
Drugs
