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Temperature dependence of the electrical and mechanical responses of the adductor pollicis muscle in humans
Author(s) -
Hopf Hanns Christian,
Maurer Konrad
Publication year - 1990
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.880130314
Subject(s) - adductor pollicis muscle , isometric exercise , contraction (grammar) , adductor muscles , muscle contraction , amplitude , nerve conduction velocity , chemistry , materials science , electromyography , anatomy , nuclear magnetic resonance , medicine , physics , ulnar nerve , elbow , quantum mechanics , psychiatry
Changes at low temperatures of the electrical and mechanical activity of the adductor pollicis muscle were studied in 10 volunteers. Decreasing temperatures resulted in increased amplitude and duration of the negative phase and peak‐to‐peak amplitude of the evoked muscle action potential. Distal latency, electromechanical latency, contraction time, and half‐relaxation time were also increased while isometric force, contraction velocity, and relaxation velocity were decreased. The increase of contraction time is greater over the temperature range below 28°C than above 29°C. Skin temperature differs significantly from muscle temperature, showing about 3°C lower values during cooling and up to 4°C higher values during rewarming with radiant heat.