The Disproportionate Cortical Representation in the Primary Motor Cortex of the Fingers

question 7

Multiple Choice

The disproportionate cortical representation in the primary motor cortex of the fingers and mouth is due to the fact that

• A) the hands and mouth take more innervation to move.
• B) are less sensitive than other areas of the body.
• C) are more sensitive than other areas of the body.
• D) require greater precision of movement.
• E) require less precision of movement.

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Definitions:

B-Thalassemia Major

A severe blood disorder caused by a genetic mutation, leading to reduced production of hemoglobin and potentially severe anemia.

Hemophilia

A medical condition, usually inherited, in which the ability of the blood to clot is severely reduced, causing the sufferer to bleed severely from even a slight injury.

X-Linked Recessive

A pattern of genetic inheritance where the gene causing the trait or disorder is located on the X chromosome; more common in males who have only one X chromosome.

Vasoocclusive Crisis

A painful episode that occurs in sickle cell anemia when sickled red blood cells block blood flow through vessels.