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12 Cards in this Set

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Transmission mode
Waking mode of EEG
Electroencephalogram
EEG
- characterize global features of cortical activity during sleep and wake.
- reflect summated activity of cortical dendrites
Burst mode
Slow-wave sleep mode of EEG
Reticular nucleus
Excitation causes thalamus to hyperpolarize.
Prevents excitation from reaching cortex.
Causes slow waves on EEG
Pedunculopontine Nu.
Innervates reticular nucleus and reduces it's activity.
prevents hyperpolarizing during wakefulness.
Lateral Dorsal Tegmental N.
Innervates reticular nucleus and reduces it's activity.
prevents hyperpolarizing during wakefulness.
Cerveau Isole
Isolated brain
- Bremer study
- Cut at mid-colliculus
- Cat's brain alone survived few days
- synchronized EEG and pupillary constriction
- comatose animal
Encephale Isole
- Cut brainstem below the medulla.
- Left both sleep and wakefulness intact.
Ascending Arousal System
- Projections from brainstem modulate arousal and consciousness.
- Wakfullness increased by projections from brainstem and post. hypothalamus to thalamus and cortex.
- receives input from pedunculopontine and laterodorsal tegmental nu.
- damage to either brach impairs consciousness
Polysomnogram
- Used to evaluate sleep behavior.
- EEG, EOG, and EMG
EOG
Electro-oculogram - detect REM
non-REM sleep
4 stages - 1, 2, 3, 4
low neuronal activity
low brain temp and metabolism
decreased SNS, HR, and BP
increased PSNS
intact muscle tone and reflexes
constricted pupils