In the Motor and Sensory Homunculi, Each Body Part Is

question 151

Multiple Choice

In the motor and sensory homunculi, each body part is shown next to the area of cerebral cortex devoted to it. Which statement best describes what these homunculi represent?

• A) The homunculi map out the dermatomes of the body.
• B) The relative size of the body parts corresponds to the ascending and descending tracts that control that body part.
• C) The homunculi are open to interpretation by neurologists, based upon his or her area of specialty.
• D) The relative size of the body part represents the relative size of the cortical area devoted to that body part.
• E) The relative size of the body part distinguishes which part is primarily on the right side of the brain versus the left.

---

Definitions:

Scoliosis

A condition in which there is an abnormal lateral curvature of the spine.

Sesamoid Bones

Sesamoid bones are small, round bones embedded in tendons, often found in locations where tendons pass over joint areas, such as the kneecap.

Calcium Salts

Compounds formed when calcium ions combine with anions, which are important for bone and teeth health and muscle function.

Calcaneus Bone

is the large bone forming the heel of the foot, acting as a foundation for the rear part of the foot and serving as an attachment site for muscles and ligaments.