Ultradian Rhythms 0.0 / 5 ? PsychologyApproachesA2/A-levelAQA Created by: Katie7082Created on: 30-11-17 12:53 Defintion A type of biologial rhythm, wih a frequency of more than one cycle in 24hrs, such as the stages of sleep 1 of 2 Example: FIVE STAGES OF SLEEP Ultradian rhythm follows pattern of altenating REM and NREM sleep Stages 1-4 are NREM A complete cycle is stages 1-5 Repeats every 90 mins Eviddence from EEG recording show distinct difference in in brainwave patterns during each stage Stage 1: light sleep muscle activity slows - occaisonal twitch Stage 2: Slightly deeper Breathing/heart rate slow and slight decrease in body temp Theta waves Stage 3: Deep sleep Delta waves Stage 4: Slower still - very deep - difficult to rouse Limited muscle activity Rhythmic breathing Stage 5: REM Body paralysed but brain activity speeds up Highly correlated with dreaming Jerky eye movements and breathing = rapid 2 of 2
Comments
No comments have yet been made