sleep Flashcards
control of sleep: explain how the sleep / wake cycle is controlled by the lateral hypothalamus and ventrolateral preoptic nucleus, and explain how the this is synchornised to day length
what system controls consciousness, and therefore maintains arousal
reticular activating system
where is the reticular activating system
originates in brainstem, and projects towards thalamus, hypothalamus and cerebral cortex
what section of the reticular activating system promotes wakefulness
lateral hypothalamus
what neuropeptide is released by lateral hypothalamus which is important in promoting wakefulness
orexin/hypocretin
what section of the reticular activating system promotes sleep
ventrolateral preoptic nucleus (anterior hypothalamus)
what part of the hypothalamus synchronises sleep with falling light level (circadian synchronisation)
suprachiasmatic nucleus
what regions of the reticular activating system does the suprachiasmatic nucleus impact
ventrolateral preoptic nucleus, lateral hypothalamus, brainstem, pineal gland
what does the pineal gland secrete in response to stimulation by suprachiasmatic nucleus
melatonin
