PSYC1002 Lecture Notes - Lecture 11: Raphe Nuclei, Electrical Brain Stimulation, Suprachiasmatic Nucleus

• School: University of Sydney
• Department: Psychology
• Course: PSYC1002
• Professor: Caleb

Document Summary

Lack of sleep increases activity in sympathetic nervous system, which can have negative impacts on the body: heart health (e. g. 24% increase in heart attacks on day after daylight savings starts) What keeps us awake: noradrenaline neurons in locus coeruleus, serotonin neurons in raphe nuclei and. What sends us to sleep: suprachiasmatic nucleus controls release of hormone melatonin from pineal gland, melatonin signals night time to whole body. Neuroscience lecture 5: adenosine builds up in brain while we are awake. Being awake for longer increases amount of adenosine: ade(cid:374)osi(cid:374)e i(cid:374)(cid:272)(cid:396)eases sleepi(cid:374)ess (cid:894)(cid:862)sleep p(cid:396)essu(cid:396)e(cid:863)(cid:895) (cid:271)(cid:455) i(cid:374)hi(cid:271)iti(cid:374)g ale(cid:396)t(cid:374)ess (cid:272)e(cid:374)t(cid:396)es (cid:894)espe(cid:272)iall(cid:455) Locus coeruleus, serotonin neurons in raphe nuclei and acetylcholine neurons in pons in brainstem. Sleep cycles: whe(cid:374) (cid:449)e(cid:859)(cid:396)e a(cid:449)ake, the ele(cid:272)t(cid:396)i(cid:272)al a(cid:272)ti(cid:448)it(cid:455) i(cid:374) ou(cid:396) (cid:271)(cid:396)ai(cid:374)s is high f(cid:396)e(cid:395)ue(cid:374)(cid:272)(cid:455) a(cid:374)d (cid:862)(cid:374)ois(cid:455)(cid:863, leep (cid:272)ha(cid:396)a(cid:272)te(cid:396)ised (cid:271)(cid:455) slo(cid:449) (cid:396)h(cid:455)th(cid:373)i(cid:272) patte(cid:396)(cid:374)s of ele(cid:272)t(cid:396)i(cid:272)al a(cid:272)ti(cid:448)it(cid:455) i(cid:374) the (cid:271)(cid:396)ai(cid:374) (cid:894)(cid:862)slo(cid:449)-wave- sleep(cid:863)(cid:895) Slow-wave sleep: role of reciprocal connections between thalamus and cortex in orchestrating synchronised neuronal activity.