PSY 3108 Lecture Notes - Threshold Of Pain, Mechanoreceptor, Eugenius Warming

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Chapter 3 in text: touch, thermal sensations, proprioception & kinesthesis, pain. Touch: subtopics: the stimuli of touch, anatomy of the skin, types of mechanoreceptors, brain areas processing touch sensations, tactile acuity and vibration sensitivity, haptic object perception. The many stimuli of touch: somatosensory neurones respond to physical changes in skin, mainly involving, pressure (stretch & compression, vibration (movement, temperature (cold or heat, these combine to elicit higher-order sensations such wetness or smoothness. Pain: excessive intensities of pressure, vibration, and temperature (as well as ph) produce painful sensations. factors, the pain threshold varies according to many, pain is in general a very complex and subtle topic. Skin & (some) mechanoreceptors: heaviest and largest sense organ by far, two main layers: keratinized skin cells, epidermis: outer layer, made up mainly of, dermis: below the epidermis. Contains three: two types of skin: hairy and hairless (no, shaving categories of mechanoreceptors doesn"t change the type), with different elastic properties.

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