Term
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Definition
| correlating perception of stimuli with their physical characteristics |
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Term
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Definition
| change I/I = constant....change I = just noticeable difference |
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Term
| power law of sensory perception |
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Definition
| log(x) = klog(I - Io)....so x = (I - Io)^k...exponent greater than one is expansive/accelerating (pain)....exponent less than one is compressive or decelerating (brightness) |
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Term
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Definition
| process of conversion of stimulus energy into a change in membrane potential: stimulation -> ion chanels open/close -> receptor current -> receptor potential (change in membrane potential) |
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Term
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Definition
| transmitter release or action potentials - how the message initiated by the stimulus is gotten accross |
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Term
| operating characteristic of a receptor |
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Definition
| frequency of a spike-generating receptor vs stimulus intensity. can be compressive or expansive. you can figure out which stage (encoding or transduction) has more of an influence on the operating characteristic by seeing the effect of receptor potential on the discharge rate (encoding). if it is linear, you can conclude that the influence doesn't come from the encoding stage (what we just tested), so it must come from the transduction stage. |
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Term
| dynamic range of a receptor |
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Definition
| reigon of stimulus intensities over which the receptor will change its output when the stimulus intensity changes |
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Term
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Definition
| a change in the gain of the receptor produced by background stimulation...dependent on intensity and length of exposure to the stimulus |
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Term
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Definition
| the value of change of intensity that evokes a reliable response from the receptor |
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