Answer to Question 1
Answer: The pons is responsible for inhibiting the release of neurotransmitters necessary for large-scale muscle movement; it is a protective mechanism that prevents the sleeper from physically acting out dreams. Although body movement is reduced, respiration, auditory nerves, and eye muscles continue to function.
Answer to Question 2
Answer: Stage 1: falling asleep; Stage 2: light sleep; Stage 3: beginning of deep sleep; Stage 4; deep sleep; Stage 5: dreaming occurs (REM sleep only present in Stage 5)
brain development in the human embryo
Pneumonia. This common lung inflammation may be caused by bacteria, viruses, or fungi and is often d
Brain Damage and Recognition of Facial Expressions of Emotion
Primary motor area of cerebral cortex
A thin cleft, called the synapse, separates one cell from another.
The human brain