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Physiology

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Central Nervous System

Question
9 out of 20
 

Weber Fechner law is related to: (DNB Jun-2009)



A Intensity discrimination

B Frequency discrimination

C Two point discrimination

D Receptive field organization

Ans. A Intensity discrimination

I. WEBER-FECHNER principle states that gradations of stimulus strength are discriminated approximately in proportion to the logarithm of stimulus strength.

II. It is related to intensity discrimination.

III. Weber-Fechner law:A graded potential in a receptor caused by a transduction process which opens or closes ion channels. The magnitude of the receptor potential is increased with increasing stimulus strength.

IV. Increasing receptor potential magnitude can increase action potential frequency. R=KSAR is the sensation felt, S is the intensity of the stimulus This does not increase action potential magnitude (All or None law).

Central Nervous System Flashcard List

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