PSYC 2301 Lecture Notes - Lecture 2: Hans Selye, Sympathetic Nervous System, Thymus
25 Mar 2015
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Document Summary
Historical models of stress: walter cannon"s fight or flight response: adaptive unless continues for long time. Perceived threat results in the activation and mobilization of the body"s coping resources sam and hpac. Stress: non-specific biological effects, regardless of cause or stressor. Stage i: alarm: activation of sam complex, arousal of the sympathetic nervous system releases hormones (e) to help prepare the body to meet stress and danger, highly adaptive short term response to an emergency situation (fight or flight) Stage ii: resistance: activates hpa if the stress is prolonged, the body continues to draw on internal resources at an above normal rate, outwards appearance seems normal, arousal lower. Sets the stage for diseases of adaptation (e. g. , peptic ulcers, ulcerative colitis) Stage iii: exhaustion: the capacity to resist is depleted, resulting in disease. Impact of selye"s gas: general theory of stress reactions, environmental physiological interactions. Stress: cognitive transactional model: emphasizes the relationship between the individual & their environment, & its appraisal.
