forebrain(diencephalon)

Question 1

what is the forebrain composed of?

Answer 1

the Diencephalon:
-Thalamus,
-Hypothalamus,

the telencephalon:
-Decorticate - Basal ganglia
-Limbic system
-Neocortex

Question 2

what are the functions?

Answer 2

-Hypothalamus:
Relay station of brainstem projections with limbic system
Autonomic and Endocrine regulation
Motivated behaviour (feeding, sexual behaviours emotional responses)
-Thalamus
Relay station brainstem projections with the cortex and between cortical regions
-Epithalamus
Regulation of sleep-wake cycle
Regulation of hunger/thirst

Question 3

What symptoms do you expect when the diencephalon is disconnected from the rest of the brain? (i.e intact thalamus)

Answer 3

Intact olfactory system and smell
Intact hormonal, thermal and homeostatic regulation

Quasi-emotional-phenomena:
Energetic behaviours, but excessive and inappropriate
Sham rage: unchecked and ongoing rage
Pathological uncontrolled laughter or crying
Constant aimless activity – wandering without a purpose
Problems in goal-directed behaviours

Question 4

what is affect and motivation?

Answer 4

aimless. excessive and spontaneous voluntary movements
- it shows a poorly directed but well-integrated affective behaviour