A small, triangular, flaccid portion of the tympanic membrane, or eardrum, lying above the malleolar folds, attached directly to the petrous bone at the notch of Rivinus.
Comment:
[taxon-note] "Size varies across mammals, with the sheep pars flaccida larger than the human" xsd:string {source="http://audilab.bmed.mcgill.ca/AudiLab/teach/me_saf/me_saf.html"}
Synonyms:
exact_synonym:
Shrapnell's membrane; pars flaccida (membrana tympanica); pars flaccida membranae tympanicae