Diencephalon: Metathalamus

Question 1

Metathalamus

Answer 1

Made of geniculate bodies

Question 2

Geniculate bodies site

Answer 2

Under surface of posterior end thalamus (pulvinar)

Question 3

Metathalamus function

Answer 3

Thalamic center of hearing and vision

Question 4

Geniculate body types

Answer 4

1. Medial (MGB)
2. Lateral (LGB)

Question 5

MGB Afferent

Answer 5

From lateral lemniscus and inferior colliculus via inferior brachium

Question 6

MGB efferent

Answer 6

Send via internal capsule sub-lentiform part (auditory radiation) to area 41 and 42 (heschl’s gyrus)

Question 7

MGB function

Answer 7

Functions as relay on auditory pathway

Question 8

LGB Afferent

Answer 8

Receives from optic tract

Question 9

LGB efferent

Answer 9

Sends via internal capsule retro-lentiform part (visual radiation) to area 17 (occipital cortex)

Question 10

LGB function

Answer 10

Constitutes 3rd order neuron in vision pathway