PSYC 2230 Lecture Notes - Alpha Wave, Delta Wave, Thymus
26 Jun 2014
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Motivation may be viewed on a continuum of behavioural activation. Continuum ranges from low levels of arousal (coma and sleep) to high levels of arousal (fig. 3. 1, p. 62): inverted u function: behaviours most efficient at optimal level of arousal. Yerkes-dodson law: a relationship between level of arousal and efficient performance (fig. 3. 2, p. 63: different tasks are related to arousal level and performance: higher arousal for simple, habitual tasks and lower arousal for complex, cognitive task. Too much arousal reduces performance: emotion and motivation related to activation of nervous system. There are structures that come into play in emotion and motivation; e. g. - separating the medulla from the spinal cord and organism goes through normal sleep-wake cycle (encephala isole preparation). (p 63 65). Separation of the colliculi from the brainstem the organism is deprived of crucial structures (medulla, pons, and reticular activating system ras) and organism sleeps constantly (cerveau isole preparation).
