Sleep Flashcards
Ultradian Rhythm
Less than a day
Infradian Rhythm
Greater than a day
Circannual Rhythm
About a year
Free-running Rhythm
Rhythm generated inside body without external cues
Zeitgeber
Time giver
Circadian Rhythm is influenced by the…
Suprachiasmatic Nucleus
Evidence Suprachiasmatic Nucleus is biological clock
1) lesions
2) metabolic activity higher in light
3) single cell recording higher in light
4) transplants repair rhythm that has been damaged
These are important proteins in controlling circadian rhythm and expressing genes
PER and CRY
Slave Oscillators
Control functions that exhibit circadian activity
These are used to recognize sleep
1) electroencephalogram (EEG)
2) electrooculogram (EOG)
3) electromyogram (EMG)
Beta waves
Excited
Alpha waves
Relaxed
Delta waves
Deep sleep
Atonia
Inhibitory output from brain to inhibit spinal motor neurons to cease movement
Why do we sleep?
1) energy conservation
2) restorative processes
3) stores memory
Basic Rest Activity Cycle (BRAC)
Composed of 90 minute cycles
2 States of Waking
1) cholinergic ➡️ awake and still
2) serotonergic ➡️ awake and moving
Circadian Rhythm
Characterized on basis of time measure in periods of about 24 hours and on basis of magnitude of rhythmic effect measured by amplitude
