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5 Cards in this Set
- Front
- Back
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What is sensory adaptation/accommodation? |
Some sensations have the quality of adaptation- decreased sensitivity to a continued stimulus. "Ignoring". After exposure to a certain stimulus strength for a time, the response of the receptors or the sensory pathways lessens from when the stimulus was first applied. The local graded depolarization that produces a receptor potential adapts/returns to its resting level, even though stimulus is still applied. Involves proprioception/tonic/phase receptors. |
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What is proprioception? |
Proprioception: is the sense of your body's position & movement. (Touch your nose with eyes closed) |
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What are the 2 types of proprioceptors that provide positional information? |
*the rate of adaptation varies for different receptors, as occurs in proprioception. When stimulus is applied... Tonic receptors: generate A.P.'s as long as a stimulus is applied so that they adapt very slowly. Fire the whole time, over and over. Duration on stimulus (Ex. Meter stick on skin, moving) Phasic receptors: adapt rapidly so they are most sensitive to changes in stimuli. Fire in a burst, then stop unless there is a change. Change in sensations (Ex. Meter stick on skin, not moving) |
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What is receptor potential? |
Receptor potential: the local/graded potential produced by the sensory receptor once the sensory neuron has been stimulated. |
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What is generator potential? |
Generator potential: receptor potential that reaches threshold, makes neuron fire, triggers A.P. |
