PSYC20006 Lecture Notes - Lecture 14: Posttraumatic Stress Disorder, Adrenal Gland, Telepathy
25 Jul 2018
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Document Summary
Noradrenaline breakdown: noradrenaline molecule, 1 additional synthesis step in adrenal gland results in hormone adrenaline, drives effects in body, monoamine oxidase (mao) inactive metabolite. Stress & arousal: stress response: intricate interactions between brain & body, optimal performance requires balance, function impaired with too much or too little stress (inverted u) Na & behavioural selection: steps, 1) competition, 2) burst of na release tips balance" in favour of winner. Increases strength of activating & inhibiting signals: 3) competition resolved, selection complete, 4) decision consolidated (executed) If it"s high-arousal context, everything is bigger and future new decisions inhibited for longer: more important/salient/arousing the alternate is, the bigger the burst of lc neurons and na release. Increased na promotes switch to new decision: promotes exploration of alternate behaviour. Lc-na & performance: low lc act + na release = tired, vague, poor performance, high lc act + na release = restless, stressed, poor performance, optimal performance: moderate activity with large intermittent bursts.
