ATONIA By N., Pam M.S. - April 7, 2013 n. refers to the lack of normal muscle tone or strength. See also dystonia. Also known as atony- atonicity. ATONIA: "A person with atonia does not have proper muscle tone." Related Psychology Terms AUDIOGRAM AUDIOMETRIC ZERO NEUROLOGICAL EVALUATION TONIC PROSTIGMIN OCCUPATIONAL CRAMP REM SLEEP SIZE PRINCIPLE ATROPHY 1 SEAMSTRESS'S CRAMP Cite this page: N., Pam M.S., "ATONIA," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/atonia/ (accessed May 16, 2021).