12 terms

Sleep Stages


Terms in this set (...)

Describe the features of N1
1. Begins with disappearance of Alpha
2. Brain waves transform from Alpha to Theta waves
3. Patient has/or may have hypnogogic jerks and twitches
4. Loss of muscle tone happens
5. conscious awareness to external environment
6. Posts appear in this stage
Describe the features of N2
1. Characterize by V waves (vertex) waves
2. Characterized by sleep spindles
3. K complexes appear in this stage
Sleep spindles in N2 rages from
11-16 HZ
K complexes in N2
1. Consists of a various mixture of delta-theta and sharp wave bursts often associated with sleep spindles
2. Start to appear in stage 2 and continues into the beginning of stage 3
3. More frontally dominate than V waves
4. Can be induced by arousal stimuli such as a click or noise
Describe the features of N3
1. Also known as Delta Sleep
2. Parasomnias happen in this stage
3. REM
4. Criteria: rapid eye movements
5. Sawtooth waves may appear
6. Memorable dreaming occurs
7. Decreasing muscle tone
Where is sawthooth waves appear
Central head regions
K-complexes are formed in what stages of sleep
Stage 2 and 3
Posts may appear in what stage of sleep
Stage 1
Stage 1 sleep is characterized by
Alpha activity decreases in voltage, then disappears
Stage 2 sleep is characterized by the presence of sleep spindles and vertex waves
In stage 1 slow transients are sharp in appearance appear in the vertex area are called V waves. They are focal at Pz, but also spread to P3 and P4.
Stage REM is characterized by
sharp theta waves called "saw-tooth" wave