PSYCH 3M03 Study Guide - Midterm Guide: Posterior Grey Column, Periaqueductal Gray, Sympathetic Nervous System
3 Apr 2018
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Thermoregulation: motivation to seek comfort in relation to excess heat/cold. Pain: adaptive value: disincentive for maladaptive/self-injurious behaviour, punishes activity when rest/recovery needed, important for signalling internal issues. C fibres: no myelin, signal travels slower, dull, aching pain, throbbing, comes later: go to dorsal horn of spinal cord to synapse and continue to brain, pain pathways to brain (ascending/afferent) post-synaptic. Spinothalamic: spinal cord medial and lateral thalamus cortex (limbic); lesion thalamus less pain perception, integration of pain w emotional response/consciousness. Spinoreticular: spinal cord reticular formation medial thalamus cortex; integration of pain with general arousal. Severe injuries and analgesic escaping situations, push you through, not think of pain: adaptive level hypothesis: past experiences influence future experiences with pain. Fear & avoidance: nature of fear: response to anticipation of damage, ancestral dangers more salient fears, can use cognitive aspects to overcome fears. Fear constrained by innate processes but flexibility in fearful behaviours and stimuli: one trial conditioning with single traumatic experiences.
