Basal Ganglia Flashcards
Salience
How much a units characteristics stand out against its neighbors
What is the order in the cortical loops
cortex, striatum, SN/GPi, Thalmus back to cortex
what is the order in Subcortical loos
subcortical structures, Thalmus, straiatum, SN/GPi then back to subcortical structures.
What are the three competing motivational systems?
Energy ballance, Fluid ballance and threat.
What does the basal ganglia model show and give examples one old one new.
It demonstartes competant dianmic signal selection action selection is a core aspect of the basal ganglia. Wildebeasts and crocodile and driving a car.
What are the three external imputs to the basal ganglia?
Cerebral cortex, limbic system, brainstem via thalmus.
What are the three imput functions of the basal ganglia?
Comparitive, affective, sensorimotor.
What 2 features make a generic selection machine?
Parallel projection channels and selective disinhibition.
Thorndikes law of effect
Any act in a given sitiuation is more likely to be selected again than before.
what does VTA stand for and where is it.
ventral tegmental area. It is a group of neurons close to the midline on the floor of the midbrain.
What are the first and second most common neurodegenerative disorders?
1 Alzheimer’s 2 Parkinsons
What are the ages of onset of Parkinsons with percentages?
4% of over 80s 1% of over 60s 5-10% of patients early onset 20-50 years
Goal directed learning
selection determined by the values of the outcomes of competing actions.
habitual control
selection determined by competing stimulus-response association.
Which type of control is implicit, unconscious, automatic, externally triggered, and involunatry
Habitual control
