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6B: other senses

QuestionAnswer
Vestibular system sensory system that helps maintain balance, posture, equilibrium
Semicircular canals placed at right angles to each other, represent three axes of rotations
Otolith organs sense linear acceleration
Saccule up+down / forward+backward
Utricle horizontal
Cupura organ that senses rotation
Somesthesis sense of touch
Mechanoreceptors touch
Proprioceptors perception/awareness
Nociceptors pain
Free nerve endings pain, heat, cold
Merkel’s disks sustained touch, pressure (cutaneous)
Meissner’s corpuscles slow vibration, texture (cutaneous)
Pacinian corpuscles rapid vibration (deep)
Ruffini’s corpuscles deep pressure (deep)
Krause corpuscles cold, rapid vibration
Root hair plexus hair movement
Tonic receptors slowly adapting receptors that respond for the duration of a stimulus
Phase receptors rapidly adapt to a constant stimulus and turn off
Thermoreceptors high thermal sensitivity
Acute pain local damage; cute, burns, broken bones, incisions, ischemia
Chronic pain long term damage associated with injury
Substance P peptide released when damage/inflammation occurs in the body
Dermatome nerve connections on the spine
Cervical top of skull to little past the neck
Thoracic most of the back bones
Lumbar lower back bones
Sacral genitals, butt, down the legs
Somatotopic organization spatial orientation of signals from different parts of the body
Gate control theory pain signals can be sent to the brain
Referred pain painful percept in a part of the body other than its source
Chemosensation sense of taste and sense of smell
Gustatory system sense of taste
Olfactory system sense of smell
Olfactory sensory neurons neurons that process the sense of smell
Olfactory epithelium superior part of each nostril
Created by: Rianagrani
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