Single Fibre Microneurography and Sensation

  • Å. B. Vallbo
Part of the Clinical Medicine and the Nervous System book series (CLIN.MED.NERV.)


The concept of a sensory threshold is a central element in sensory physiology and psychophysics. Yet it is a puzzle that a distinct threshold cannot be demonstrated. A fixed threshold would imply that stimuli above a certain strength are detected with certainty by a human observer while all stimuli below this strength escape detection. Experimental findings, on the other hand, demonstrate that the sensory threshold is a smoothly rising function, i.e. the probability of psychophysical detection gradually rises with stimulus intensity. The plot of the probability of detection as a function of stimulus strength usually follows an S-shaped curve.


Receptive Field Human Hand Skin Region Glabrous Skin Single Impulse 
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© Springer-Verlag Berlin Heidelberg 1989

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  • Å. B. Vallbo

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