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Senses. General - located throughout body Special – localized to specific organs. Sensory / Afferent Receptors. Chemoreceptors – detect chemicals dissolved in solution Mechanoreceptors – respond to change in pressure of movement of fluids/tissue Nocioceptors – respond to tissue damage
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Senses General - located throughout body Special – localized to specific organs
Sensory / Afferent Receptors • Chemoreceptors – detect chemicals dissolved in solution • Mechanoreceptors – respond to change in pressure of movement of fluids/tissue • Nocioceptors – respond to tissue damage • Thermoreceptors – respond to changes in temperature • Photoreceptors – respond to light energy
General Senses somatic senses Associated with skin, muscles, joints and visceral organs • Touch -- Pressure [ mechanoreceptors] • Proprioception [ mechanoreceptors] • Temperature [ mechanoreceptors] • Pain [ mechanoreceptors]
Special Senses Taste = Gustatory [ chemoreceptor] CN VII [facial] & IX [ glossopharyngeal] Smell = Olfaction [ chemoreceptor] CN I [olfactory] Hearing/ Equilibrium [ mechanoreceptor] CN VIII [ acoustic / vestibulocochlear] Sight [ photoreceptor] CN II [optic]
Cranial Nerves CN I – Olfactory – sensory CN II – Optic - sensory CN III – Oculomotor - motor CN IV –Trochlear– motor CN VI – Abducens - motor
CN III – Oculomotor CN IV - Trochlear
Cranial Nerves CN V – Trigeminal – sensory & motor
Cranial Nerves CN VII - Facial – sensory & motor
Cranial Nerves CN VIII – Vestibulocochlear - sensory CN IX – Glossopharyngeal – sensory & motor
Cranial Nerves CN X – Vagus – sensory & motor
Cranial Nerves CN XI – Accessory - motor
Cranial Nerves CN XII – Hypoglossal - motor