Thalamus - Afferent And Efferent Connections

Question 1

A

Answer 1

• Afferent: mammillary body (mammillothalamic tract), fornix, hippocampus, hypothalamus
• Efferent: cingulate gyrus (BA 23, 24, 32)

Question 2

VA and VL

Answer 2

• Afferent: GP, RF, substantia nigra, cerebellum (dentate nuc.)
• Efferent: precentral g. (VL to BA 4, VA to BA 6)

Question 3

VPL

Answer 3

• Afferent: spinothalamic t. (crude touch, itch, acute pain, thermal info.), dorsal column nuclei (medial lemniscus - fine touch, vibration, conscious proprioceptive info., tactile pressure)
• Efferent: primary somatosensory area (BA 3, 1, 2) in postcentral g.

Question 4

VPM

Answer 4

• Afferent: spinal nuc. of trigeminal n. and principal sensory nuc. of trigeminal n. (trigeminal lemniscus or trigeminothalamic tract), ascending fibers from solitary tract nuc. (taste information), vestibular information from the vestibular nuclei
• Efferent: primary somatosensory area (BA 3, 1, 2) in postcentral g.

Question 5

DM or MD

Answer 5

• Afferent: amygdaloid nucleus
• Efferent: prefrontal areas (frontal lobe)

Question 6

CM

Answer 6

• Afferent: RF, spinothalamic t., spinal nuc. of trigeminal n. (trigeminal lemniscus)
• Efferent: frontal lobe

Question 7

LP and pulvinar

Answer 7

• Afferent: cerebral cortex, spinothalamic t., sup. colliculus, pretectal area, geniculate bodies
• Efferent: all association areas, all limbic structures

Question 8

Reticular nucleus

Answer 8

• Afferent: thalamus
• Efferent: thalamus

Question 9

MGB

Answer 9

• Afferent: brachium of inf. colliculus
• Efferent: sup. temporal g. or primary auditory cortex (BA 41, 42)

Question 10

LGB

Answer 10

• Afferent: retina (optic n. and t.)
• Efferent: striate cortex (BA 17) occipital lobe