Diencephalon

Question 1

Thalamus

Answer 1

80% of diencephalon.

• relay center for incoming sensory messages
• all afferent impulses EXCEPT olfactory converge at thalamus. The thalamus nuclei then organizes, amplifying or scales down signals

Question 2

Thalamus nuclei

Answer 2

ventral posteriorlateral. Relay station for sensory info ascending to the primary sensory ares of cerebral cortex.

Question 3

Thalamus nuclei- medial geniculate body

Answer 3

auditory

Question 4

Thalamus nuclei- lateral geniculate body

Answer 4

visual

Question 5

Hypothalamus

Answer 5

inferior to thalamus. Between optic chiasm and posterior border of the mamillary bodies.
pituitary gland
main visceral control center of body
control sleep-wake– superchiasmatic nucleus

Question 6

Hypothalamus- pre optic nucleus

Answer 6

response to superchiasmatics nucleus to induce sleep

Question 7

Hypothalamus- mamillary bodies

Answer 7

arousal from sleep. Relay of impulses from amygdala and the hippocampus

Question 8

Hypothalamus functions

Answer 8

• endocrine
• autonomic nervous system
• body temperature
• hunger/thirst
• feeding (initiating= lateral, inhibiting = ventromedial)
• emotion- pleasure, sex, rage
• motivation
• memory( mamillary)
• sleep wake

Question 9

Epithalamus

Answer 9

pineal gland

• influenced by the hypothalamus
• melatonin
• contributes to circadian rhythms