PLASTIC TONUS

a state of voluntary muscles so that an appendage can be passively moved into positions which are held constant, at times, for hours. It is symptomatic of catatonia.

PLASTIC TONUS: "The plastic tonus condition of her arms makes me suspect underlying illness."
Cite this page: N., Pam M.S., "PLASTIC TONUS," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/plastic-tonus/ (accessed October 17, 2019).
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