Abnormal anterior belly of the digastric muscle: a proposal for the classification of abnormalities.
We recognized an abnormal anterior belly of the digastric muscle in an 83-year-old male cadaver. Three muscle bundles were observed on the left anterior belly: (i) attached to the left digastric fossa; (ii) attached to the right digastric fossa; and (ii) attached to the raphe of the mylohyoid muscle. Four muscle bundles were recognized on the right anterior belly: (i) attached to raphe of the mylohyoid muscle; (ii, iii) attached to the exterior surface on the base of the mandible from the raphe of the mylohyoid muscle; and (iv) attached to the interior surface on the base of the mandible from the raphe of the mylohyoid muscle. The raphe of the mylohyoid muscle was curved significantly to right and the four abnormal bundles found on the right anterior belly (see above) were attached to its curved point.
Fujimura
Akira
A
First Department of Oral Anatomy, School of Dentistry, Iwate Medical University, Morioka, Japan. akifuji@iwate-med.ac.jp
Onodera
Masao
M
Feng
Xin-Yan
XY
Osawa
Tokuji
T
Nara
Eisuke
E
Nagato
Satomi
S
Matsumoto
Yoko
Y
Sasaki
Nobuhide
N
Nozaka
Yohichiro
Y
D000368:Aged; D000369:Aged, 80 and over; D019521:Body Patterning; D006801:Humans; D006928:Hyoid Bone / Q000002:abnormalities / Q000473:pathology; D008297:Male; D008334:Mandible / Q000002:abnormalities / Q000473:pathology; D008340:Mandibular Nerve / Q000033:anatomy & histology / Q000473:pathology; D008410:Masticatory Muscles / Q000002:abnormalities* / Q000294:innervation / Q000473:pathology*; D019767:Maxillofacial Abnormalities / Q000145:classification* / Q000473:pathology*; D012016:Reference Values