has part has part has_part characteristic of has modifier abnormal forebrain morphology absent forebrain absent prosencephalon absence of the anterior of the three primary divisions of the developing chordate brain or the corresponding part of the adult brain (in vertebrates, includes especially the cerebral hemispheres, the thalamus, and the hypothalamus and especially in higher vertebrates is the main control center for sensory and associative information processing, visceral functions, and voluntary motor functions) missing prosencephalon forebrain agenesis missing forebrain csmith prosencephalon agenesis MPheno.ontology MP:0012136 2013-10-09T15:20:00Z abnormal absent forebrain