has part has part has_part characteristic of part of has modifier abnormal tongue muscle morphology abnormal extrinsic tongue muscle morphology 2017-09-28T08:10:03Z MPheno.ontology abnormal extrinsic lingual muscle morphology any structural anomaly of any of the four paired muscles that originate outside of and insert into the tongue and act to alter the position of the tongue, allowing for protrusion, retraction, and side-to-side movement; these muscles include the genioglossus, the hyoglossus (often including the chondroglossus), the styloglossus, and the palatoglossus MP:0030209 morphology abnormal extrinsic muscle of tongue