The stage of vivid dreaming and paradoxical brain activity. 🛌 Slide 5: NREM Stage 1 (N1) – The Gateway
| Rhythm | Frequency | State | | :--- | :--- | :--- | | Beta | 13-30 Hz | Awake, alert, anxious | | Alpha | 8-13 Hz | Awake, relaxed, eyes closed | | Theta | 4-8 Hz | Light sleep (N1), drowsiness | | Delta | 0.5-4 Hz | Deep sleep (N3), regeneration | eeg and sleep physiology ppt