BRS

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BRS Neuroanatomy

Ventral lat. nucleus (area 4)

A

Ventral lat. nucleus (areas 3, 1, and 2)

Ventral ant. nucleus (areas 6 and 8)

Mediodorsal and ventral ant. nuclei

Lat. post. nucleus (areas 5 and 7)

(areas 9–12 and 44–47)

Pulvinar (areas 18, 19, 39, and 40)

Lat. geniculate body (area 17)

Medial geniculate body (areas 41 and 42)

B

Ventral lat. nucleus (area 4)

Central sulcus

Ventral post. nucleus (areas 3, 1, 2)

Ventral lat. nucleus (area 6)

Lat. dorsal nucleus (areas 5 and 7)

Ant. nucleus group (areas 24 and 31)

Lat. post. nucleus (area 7) Pulvinar

Mediodorsal and ventral ant. nuclei (areas 9–12)

(areas 18 and 19)

Lat. geniculate body

Calcarine fissure (area 17)

Pulvinar (areas 18 and 19)

FIGURE 13.2. (A) Lateral and (B) medial views of the cerebral hemisphere showing the cortical projection areas of the major thalamic nuclei.

III. PRIMARY THALAMIC NUCLEI AND THEIR MAJOR CONNECTIONS

A. Anterior nucleus ■ receives hypothalamic input from the mammillary nucleus via the mammillothalamic tract. ■ receives hippocampal input via the fornix. ■ projects to the cingulate gyrus. ■ part of Papez circuit, a well-described learning and memory circuit. B. Dorsomedial nucleus (mediodorsal nucleus) ■ reciprocally connected to the prefrontal cortex. ■ has abundant connections with the intralaminar nuclei. ■ receives input from the amygdala, the temporal neocortex, and the substantia nigra. ■ part of the limbic and striatal systems.

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