part of part of in lateral side of innervated by innervated_by attached to attached to has muscle origin has muscle origin has muscle insertion has muscle insertion Homo sapiens facial muscle depressor labii inferioris facial nerve mandible lower lip chin mentalis muscle http://upload.wikimedia.org/wikipedia/commons/3/37/Mentalis.png A muscle of facial expression, innervated by the facial nerve, attached to the skin of the lower lip and inferior to the lower lip (in humans this region is called the chin or mental region), the orbicularis oris muscle, and the mandible in the symphyseal region. See Diogo et al., 2009; Burrows et al., 2011). MFMO:0000122 UBERON:0008596 Wikipedia:Mentalis musculus mentalis FMA:46825 SCTID:244744003 mentalis orbicularis oris muscle digestive system element lateral structure mandibular symphyseal region