Sleep cycles

Front

The pattern of physical and behavioral changes that follows a 24 hour cycle, in accordance with the hours of light and darkness.

Back

circadian rhythm

Front

The stages of sleep are classified into two distinct basic types characterized by

Back

rapid eye movement vs non-rapid eye movement

Front

The stages of sleep are differentiated from each other by

Back

varying patterns of brain activity

Front

A hormone released by the pineal gland that increases feelings of relaxation and tiredness

Back

melatonin

Front

During this stage of sleep, you drift in and out of sleep and can be easily awakened.

Back

NREM 1

Front

During this stage of sleep, muscle activity and eye movements completely stop, and you become difficult to awaken.

Back

NREM 3

Front

The period of the sleep cycle when most dreaming occurs is

Back

REM

Front

Stage 3 sleep disorder that may cause you to wake up screaming or sweating.

Back

Night Terrors

Front

In NREM-1, ________________ are the sensation that we are falling, which causes us to wake up.

Back

hypnagogic sensations

Front

In REM sleep, the motor cortex is active, but the __________ blocks our movement, preventing us from acting out our dreams.

Back

brain stem