Musco Mus musculus dorsalis externi medialis musculus rhomboideus superficialis musculus flexor digitorum sublimis musculus incisivi labii superioris musculi flexor digitorum profundus musculi quadratus labii superioris musculus arytaenoideus transversus musculus quadratus labii superioris musculi obliquus internus abdominis muscarine type cholinergic receptor