PSYC 271 Chapter 6: Somatosenses
13 Jul 2016
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They respond to changes and are attracted to changes that occur. The speed of habituation to stimuli is adaptation. Indentation of something, vibrations are quickly felt and shut off. Respond to changes between 22 and 23 degrees in water, but you cant tell if you"re cold. You"ll acclimatize to rooms that initially seem cold/warm. Afferent nerves enter through the spinal cord through the dorsal horn dorsal column. Travel up the spinal cord ipsilaterally to the dorsal nuclei. Typically results from parietal lobe damage, limited to one side of the body. Deep mechanical stimulation from fun to not anymore. High threshold mechanoreceptors (touch receptors ) intense pressure. Irritant detectors: chemicals that produce inflammation (tear gas, mustard, garlic) Allodynia: perception of pain to a stimuli that was not previously painful. Von frey filaments (sharp) with a set force. Chronic pain from damage to the spinal cord. Myelinated, fast fibers carry temperature information for sharp acute pain.
