Central Nervous System
Weber Fechner law is related to: (DNB Jun-2009)
|C||Two point discrimination|
|D||Receptive field organization|
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).