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Define Differential Sensibility
Receptors may be structurally similar but only get activated by specific stimuli and ignore others
Expanded tip endings
Merkel's Disk
Spray endings
Ruffinis endings
Encapsulated endings
Meissner's corpuscles
Krause's corpuscles
NociReceptors
Detect physical and chemical damage
Eg: Spilling acid substance of finger
MechanoReceptors
Detect mechanical compression and stretching of receptor or adjacent tissue
EG: skin tactile receptors
What are the five classifications for sensations?
1. Type of stimulus energy
2. Scourse of stimulus (Sherrington)
3. Type of sensation
4. Rate of adaptation
5. Anatomical / clinical
Name 4 Deep tissue sensibilities
Encapsulated - Pacinian Corpuscles (lamellar)
Hearing - Sound receptors of cochlea
Vestibular Receptors in ears for balance
Arterial pressure via Baroreceptors
Components of Sherrington classification
Externo: outside body (skin)
Enterno: inside body (chemo, proprio, baro, gluco)
Tele: Distant from body (visual, choclear, olfactory)
What are the 2 rates of adaptation
Slow and Rapid
What is slow adapting
Tonic and static receptors that continuously fire AP during stimulus application.
No change with increasing stimulus intensity
Eg: pain, cold, muscles and joints
protective function
What are rapidly adapting receptors
Phasic and dynamic receptors that fire AP at decreasing rate.
Specific to the amount of stimuli
What are the 3 anatomical classifications?
Superficial = close to the surface
Deep = muscles, tendons, joints and subcutaneous tissue
Visceral = inside organs
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