ANP 1106 Lecture Notes - Lecture 2: Peripheral Nervous System, Sensory Neuron, Thermoreceptor

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1106
• Professor: Frank Feiner

Document Summary

Sensory stimulus type: mechanoreceptors, mechanical force (touch, pressure, vibration, stretch, thermoreceptors, temperature and temperature change, photoreceptors, light, chemoreceptors, molecules smelled/tasted, also changes in blood/interstitial fluid chemistry, nociceptors, pain from damaging stimuli, eg. Receptor location etc: stimuli outside (of you, eg. Touch, pressure, pain, temperature, vision, hearing, taste, smell: exteroceptors at/near body surface. Interoceptors (visceroceptors) inside body: proprioceptors also inside body etc, confined to muscles, tendons, joints, ligaments, monitor stretch, inform brain of movement, stimuli inside body, eg. Most body tissues, especially connective tissue, joint capsules epithelia, and glands warm/cold. Exteroceptors: dermal papillae of hairless skin- nipples, external genitalia, fingertips, soles of feet, eyelids hair deflection. Mechanoreceptors: light pressure, discriminative touch, low frequency vibration (merkel) discs. External genitalia, fingertips, soles of feet, deep pressure, stretch, high frequency vibration. Provide info on joint position & motion joint stretch. Levels of sensory perception: sensation, awareness of internal/external environment, perception, conscious interpretation of stimuli, somatosensory system, three levels of neural integration, receptor level.