Nov 1, 1977

Influence of temperature on neuromuscular transmission in myasthenia gravis

Journal of Neurology
K RickerS Stodieck


The effect of local cooling was studied in 28 patients with myastenia gravis. We stimulated the ulnar nerve with single stimuli and trains at 3/s for 2s and at 50/s for 1.5 s. The compound muscle action potential (MAP), the muscle twitch and the isometric tetanic force of the adductor pollicis were registered. 1. At 3/s stimulation the pathological decrement of the MAP decreased after slight cooling. 2. The amplitude of the single MAP was higher at lower temperature when compared to normal temperature. The same increase is however to be found in healthy subjects. 3. After slight cooling, the maximum tetanic force was higher. However, the decrement of the force was higher also, therefore ruling out a practicable application of cooling for the patient. 4. After severe cooling (18-22 degrees C) the tetanic force was much lower and in many cases a complete failure of the neuromuscular transmission occured.

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Mentioned in this Paper

Synaptic Transmission
Myasthenia Gravis
Myasthenia Gravis, Ocular
Nerve Impulses
Nerve-Muscle Preparation

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