A 66-Year-Old Man Has Difficulty Controlling Voluntary Movements

question 13

Multiple Choice

A 66-year-old man has difficulty controlling voluntary movements. He can clearly state what he intends to do, describe how he would do it, and initiate or stop the movement. However, he has poor coordination and often misses his target. If his difficulty arises from a defect in one particular area of the central nervous system, which area is most likely to be involved?

• A) Association cortex
• B) Primary motor cortex
• C) Muscle spindles
• D) Spinocerebellum

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Definitions:

Fetus

A developing human from roughly 8 weeks after conception until the time of birth.

Motion

Describes the change in position of an object with respect to time and its surroundings.

Lungs

Pair of respiratory organs located in the thorax, responsible for exchanging oxygen and carbon dioxide between the blood and the environment.

Breathing Air

The act of inhaling oxygen from the atmosphere and exhaling carbon dioxide, essential for the survival of terrestrial organisms.