The Excessive Activity Observed in ADHD Appears to Be

question 12

Multiple Choice

The excessive activity observed in ADHD appears to be

• A) caused by hyperarousal of the motor systems.
• B) attempts by patients to self-stimulate an underaroused cortex.
• C) seizure-like excitability of motor areas of the cortex.
• D) unaffected by reinforcing or punishing contingencies.

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Definitions:

Billion Years

A period of time equal to one thousand million (1,000,000,000) years, often used to express the age of the Earth or the universe.

Continental Drift

The movement of the Earth’s crust by plate tectonics, resulting in the movement of continents with respect to one another.

Glossopteris

An extinct genus of seed fern that serves as evidence for the theory of continental drift and once thrived in the supercontinent Gondwana.