has part has part has_part characteristic of part of has modifier abnormal extrinsic tongue muscle morphology abnormal genioglossus muscle morphology 2017-09-28T09:37:50Z MP:0030210 abnormal genioglossal muscle morphology any structural anomaly of the paired, fan-shaped extrinsic tongue muscle which forms the majority of the body of the tongue, arises from the mental spine of the mandible and inserts into the hyoid bone and the bottom of the tongue; its action protracts and depresses the tongue abnormal genioglossus morphology MPheno.ontology morphology abnormal genioglossus muscle