Both the Primary Somatosensory Cortex and the Primary Motor Cortex

question 58

Multiple Choice

Both the primary somatosensory cortex and the primary motor cortex have all regions of the body represented within each cortex.How is this representation organized?

• A) Larger body parts are represented by more neurons within each cortex.
• B) Areas of the body requiring greater muscle strength have more neurons located in both cortexes.
• C) Representation is proportional to the innervation of the body area that results in finer motor control or greater sensitivity.
• D) The senses of sight and hearing occupy most of the cortical map, with all other body parts having fewer neurons in either cortex.
• E) Information from muscle fibers is distributed uniformly throughout the primary motor cortex, which passes this information on to the somatosensory cortex.

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