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Open AccessJournal Article

Transcranial magnetic stimulation. Negative effects.

Mark Hallett
- 01 Jan 1995 - 
- Vol. 67, pp 107-113
TLDR
Myoclonus appears to be generated by a brief transient activation of a focal region of motor cortex that gives rise to a transient depression of function that would lead to a brief lapse in muscle activation that would be interpreted as either asterixis or negative myOClonus.
Abstract
Myoclonus appears to be generated by a brief transient activation of a focal region of motor cortex. Activation of a focal region of motor cortex can also give rise to a transient depression of function. If a subject, or patient, is trying to produce movement, this depression would lead to a brief lapse in muscle activation that would be interpreted as either asterixis or negative myoclonus. Both positive events and negative events can occur either individually or together. The physiological substrate in the cortex appears to be different for the two phenomena, and the pharmacology may differ as well.

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