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)
The major language areas of the left hemisphere of the brain.
Blood coagulation pathways in vivo showing the central role played by thrombin
A rat pressing a lever to obtain rewarding brain stimulation.
Split-brain patients were shown composite photographs
This image shows a normal third-trimester fetal brain
Cancer cells can move to new locations in the body, a process called metastasis