Document Detail

Responses of mechanoreceptive afferent units in the glabrous skin of the human hand to sinusoidal skin displacements.
MedLine Citation:
PMID:  6288178     Owner:  NLM     Status:  MEDLINE    
The impulse responses to perpendicular sinusoidal skin displacements were recorded from 4 different types of mechanoreceptive different units innervating the glabrous skin of the human hand. The cycle responses, defined as the number of impulses evoked per sine wave cycle, were studied at a wide range of frequencies (0.5-400 Hz) and amplitudes (0.001-1mm). The rapidly adapting units (RA) were most easily excited at stimulus frequencies between 8 and 64 Hz, whereas the corresponding frequencies for the Pacinian units (PC) were above 64 Hz. However, at high stimulus amplitudes, the RA and the PC units showed quite similar response profiles within the range of frequencies tested. The sensitivities of the slowly adapting unit types (SA I and SA II) were greatest at lower frequencies. A characteristic finding for all 4 types of units was that the higher the amplitude, the lower the frequency at which the cycle response was maximal.
R S Johansson; U Landström; R Lundström
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Brain research     Volume:  244     ISSN:  0006-8993     ISO Abbreviation:  Brain Res.     Publication Date:  1982 Jul 
Date Detail:
Created Date:  1982-12-02     Completed Date:  1982-12-02     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0045503     Medline TA:  Brain Res     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  17-25     Citation Subset:  IM; S    
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MeSH Terms
Afferent Pathways / physiology
Evoked Potentials, Somatosensory
Hand / innervation*
Mechanoreceptors / physiology*
Physical Stimulation
Sensory Thresholds
Skin / innervation*
Synaptic Transmission

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