Brodmann's area 4

Brodmann's area 4

[′bräd·mənz ‚er·ē·ə ′fȯr]
(anatomy)
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This area corresponds to the posterior part of the frontal lobe (Brodmann's area 4, the primary motor field of the isocortex) and the anterior parts of the cerebral parietal lobe (the gyrus postcentralis, which corresponds to the primary somatosensory fields, Brodmann's areas 1, 2, and 3).
Afferent input into these nuclei is from the cerebral cortex, information being received from the primary motor cortex (Brodmann's area 4), primary sensory cortex (Brodmann's area 3, 1, 2), association cortex (Brodmann's area 5), premotor cortex (Brodmann's area 6), and supplementary cortex (Brodmann's area 6).