Scientists Believe That Narcolepsy Is Caused by

question 136

Multiple Choice

Scientists believe that narcolepsy is caused by

• A)an overactive thyroid gland.
• B)loss of brain cells in the hypothalamus.
• C)an underactive thyroid gland.
• D)loss of brain cells in the reticular system.
• E)substance abuse.

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Definitions:

Superior Rectus

A muscle in the eye that primarily enables upward movement of the eyeball.

Inferior Rectus

A muscle in the eye that controls downward movement of the eyeball.

Superior Rectus

A muscle in the human eye, which is responsible for elevating the eye and turning it inward.

Orbicularis Oris

The orbicularis oris is a complex of muscles in the lip area that encircles the mouth, responsible for lip movements such as closing, puckering, and shaping during speech and eating.