Uploaded byNikhil Pradeep
SLEEP .pdf
The document provides information about sleep stages and the associated EEG patterns. It discusses the main sleep stages: Stage 1 (N1), Stage 2 (N2), Stage 3 (N3), and REM sleep. For each stage it provides the characteristic EEG patterns, level of brain activity, eye movements, muscle activity, and other physiological indicators. The document is intended to help students learn about the different sleep stages identified on an EEG or polysomnography recording.
SLEEP .pdf
- 1. Sleep stages identification slidespdf shared for students Dr. Sachin Arora DAMS Psychiatry
- 2. NEET PG 2020q. The marked EEG in below image is of: (BOXED) A.Sleep stage 1 (N1) B. Sleep stage 2 (N2) C. Sleep stage 3 (N3) D.REM sleep DR SACHIN ARORA
- 4. Electrophysiology Of Sleep Sleep stage AssociatedEEG pattern & characteristics Awake Beta waves (13-30cps) Alpha waves(8-13cps) Active mental concentration Relaxed with eyes closed Stage 1 ◼ Mixed frequency pattern ◼ Theta waves (4-8 cps) Onset of sleep with waves slow rolling eye movements Lightest stage of sleep ↓ Pulse, respiration & BP
- 5. Electrophysiology Of Sleep(Contd.) Sleep stage Associated EEG pattern & characteristics Stage 2 Sleep spindle & K-complex Largest % of sleep Rapid eye movement absent Reduced EMG level Disorders – Bruxism Stage 3 20% <δ< 50% & Stage 4 δ >/= 50% Delta (0-4 cps) (SWS) Deepest sleep ↓ with age Most relaxed stage Disorders-night terror, sleep walking & enuresis
- 6. Sleep stage AssociatedEEG pattern & characteristics REM sleep Bursts of 3 -5 Hz activity NO EMG activity Saw tooth, beta, alpha, theta waves Dreaming, penile erection, & vaginal lubrication ↑ Pulse, respiration, BP & gastric secretion Muscle atonia ↓ with age Peak REM - 5-6AM : most of deaths due to cardiac problems Electrophysiology Of Sleep (Contd.)
- 7. Question (AIIMS) Thecolumn 3 of polysomnography set in the given image corresponds to which stage? A.Awake stage B.REM stage C.NREM stage D.Drowsy due to medications
- 9. Q : Eyemovements of sleep stages was recorded and which sleep stage the given part of graph represent: A. REM B. NREM 1 C. NREM 2 D. NREM 3 # INICET MAY, 2022