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How does the central sulcus separate motor and sensory areas of the cerebral cortex?
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human nervous system
The conduction of electrochemical stimuli from sensory receptors in the human nervous system occurs via organized groups of specialized cells, consisting largely of neurons, various neural support cells, and tracts of nerve fibers.
The central sulcus, also known as the fissure of Rolando, serves as a primary anatomical boundary on the surface of each cerebral hemisphere that distinguishes the frontal lobe from the parietal lobe.12
This fissure functions as a separator between the brain's primary motor and sensory regions:
- Motor Area: Located immediately anterior (rostral) to the central sulcus is the precentral gyrus, which constitutes the primary motor region of the brain. This area is responsible for producing voluntary movements on the opposite side of the body.12
- Sensory Area: Located immediately posterior (caudal) to the central sulcus is the postcentral gyrus, which serves as the primary sensory area. This region receives and processes sensory input from the contralateral half of the body.12
Because of this positioning, the central sulcus effectively acts as the dividing line between the cortical motor area in the frontal lobe and the cortical sensory area in the parietal lobe.2