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The anterior belly may be double, or extra slips from this belly may pass to the jaw or mylohyoideus or decussate with a similar slip on opposite side. It may be absent and posterior belly inserted into the middle of the jaw or hyoid bone. It may fuse with the
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origins - the anterior belly is derived from the first brachial arch and the posterior belly from the second brachial arch - and consequently differ in their innervation (the former being innervated via CN V and the latter via CN VII).
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The digastric muscle is involved in any complex jaw action such as speaking, swallowing, chewing, and breathing. The posterior belly is particularly functionally involved in swallowing and chewing.
269:
The digastric muscle consists of two muscular bellies united by an intermediate tendon. The posterior belly is longer than the anterior belly. The two bellies of the digastric muscle have different
432:
The intermediate tendon may be absent. The posterior belly may arise partly (by an supplemental strip of muscle) or entirely from the styloid process of the temporal bone. It may be connected by a
198:
250:; the two bellies are united by an intermediate tendon which is held in a loop that attaches to the hyoid bone. The anterior belly is innervated via the
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The tendon may pass in front, more rarely behind the stylohyoideus. The mentohyoideus muscle passes from the body of hyoid bone to chin.
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The term "digastric muscle" refers to this specific muscle even though there are other muscles in the body to feature two bellies.
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Schiraldi, Michael; Baron, Eli M.; Vaccaro, Alexander R. (2018-01-01), Baron, Eli M.; Vaccaro, Alexander R. (eds.),
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The digastric muscles are present in a variety of animals, specific attachment sites may vary. For example, in the
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It extends anteroinferiorly from its osseous attachment toward the intermediate tendon.
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602:"Procedure 5 - Anterior C1-C2 Arthrodesis: Lateral Approach of Barbour and Whitesides"
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The posterior belly is situated posterior to the parotid gland and the facial nerve.
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Knowledge articles incorporating text from the 20th edition of Gray's
Anatomy (1918)
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muscle. The tendon is embraced by a fibrous sling which attaches the body and
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It extends inferoposteriorly from its origin toward the intermediate tendon.
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291:(which is located upon the inferior surface of the skull, medial to the
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The muscle depresses the mandible, and may elevate the hyoid bone.
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608:, Operative Techniques, Philadelphia: Elsevier, pp. 36–40,
258:. It may act to depress the mandible or elevate the hyoid bone.
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Gray's
Anatomy: The Anatomical Basis of Clinical Practice
318:(situated at the base of the mandible near the midline).
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The anterior belly receives motor innervation from the
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at Human
Anatomy Online, SUNY Downstate Medical Center
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Operative
Techniques: Spine Surgery (Third Edition)
367:mandibular division of the trigeminal nerve (CN V
234:as it has two 'bellies') is a bilaterally paired
1129:
254:, and the posterior belly is innervated via the
693:
462:when the hyoid bone is held in place (by the
422:inferior carotid triangle (muscular triangle)
16:Small muscle located under the jaw in mammals
246:, and its anterior belly is attached to the
410:submandibular triangle (digastric triangle)
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686:
585:: CS1 maint: location missing publisher (
486:, the posterior digastric attaches to the
39:
27:
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329:The two bellies meet at the intermediate
242:. Its posterior belly is attached to the
557:(42nd ed.). New York. p. 581.
418:submental triangle (suprahyoid triangle)
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436:to the middle or inferior constrictor.
376:The posterior belly is supplied by the
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504:This article incorporates text in the
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299:- between the mastoid process and the
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667:Roche Lexicon - illustrated navigator
345:. The tendon occasionally features a
96:Anterior belly - Submental branch of
658:at the SUNY Downstate Medical Center
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287:The posterior belly attaches at the
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365:, which is in turn a branch of the
314:The anterior belly attaches at the
13:
614:10.1016/b978-0-323-40066-4.00005-9
289:mastoid notch of the temporal bone
282:
252:mandibular nerve (cranial nerve V)
61:Anterior belly - digastric fossa (
33:Muscles of the neck. Lateral view.
14:
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638:
408:into four smaller triangles: the
404:The digastric muscle divides the
387:Anterior view of digastric muscle
309:
1115:
498:
477:
378:digastric branch of facial nerve
256:facial nerve (cranial nerve VII)
776:Rectus capitis lateralis muscle
771:Rectus capitis anterior muscle
663:"Anatomy diagram: 25420.000-1"
593:
352:
244:mastoid notch of temporal bone
1:
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406:anterior triangle of the neck
1143:Muscles of the head and neck
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277:
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512:of the 20th edition of
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316:digastric fossa of mandible
248:digastric fossa of mandible
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669:. Elsevier. Archived from
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206:Anatomical terms of muscle
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551:Standring, Susan (2020).
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794:Rectus capitis posterior
656:Anatomy photo:24:17-0101
650:Anatomy figure: 34:02-02
490:rather than the hyoid.
363:inferior alveolar nerve
303:of the temporal bone).
139:Opens the jaw when the
1090:Pharyngobasilar fascia
1085:Buccopharyngeal fascia
907:Pharyngeal constrictor
388:
400:Triangles of the neck
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333:which perforates the
82:Intermediate tendon (
65:); posterior belly -
1080:Palatine aponeurosis
1048:Deep cervical fascia
993:transverse arytenoid
163:musculus digastricus
125:; posterior belly -
100:; posterior belly -
1158:Human head and neck
1153:Otorhinolaryngology
1058:Prevertebral fascia
734:Sternocleidomastoid
325:Intermediate tendon
115:mandibular division
45:Front view of neck.
1148:Suprahyoid muscles
1053:Pretracheal fascia
934:Salpingopharyngeus
464:infrahyoid muscles
389:
238:located under the
1103:
1102:
979:oblique arytenoid
623:978-0-323-40066-4
564:978-0-7020-7707-4
458:It depresses the
451:Actions/movements
361:(a branch of the
236:suprahyoid muscle
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113:Anterior belly -
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1095:Pharyngeal raphe
811:Obliquus capitis
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442:mylohyoid muscle
414:carotid triangle
224:digastric muscle
212:edit on Wikidata
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102:occipital artery
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22:Digastric muscle
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359:mylohyoid nerve
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347:synovial sheath
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301:styloid process
293:mastoid process
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283:Posterior belly
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123:mylohyoid nerve
121:(CN V) via the
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673:on 2015-02-26.
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506:public domain
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478:Other animals
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297:temporal bone
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67:mastoid notch
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952:Cricothyroid
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786:Suboccipital
744:Longus colli
671:the original
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627:, retrieved
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175:A04.2.03.002
162:
147:are relaxed.
127:facial nerve
117:(V3) of the
1075:Alar fascia
879:Sternohyoid
434:muscle slip
353:Innervation
228:digastricus
152:Identifiers
1132:Categories
1030:Trachealis
874:Thyrohyoid
866:Infrahyoid
856:Geniohyoid
846:Stylohyoid
833:Suprahyoid
629:2020-11-10
573:1201341621
494:References
420:, and the
343:hyoid bone
145:temporalis
119:trigeminal
84:hyoid bone
974:Arytenoid
962:posterior
851:Digastric
841:Mylohyoid
764:posterior
581:cite book
484:orangutan
428:Variation
392:Relations
278:Structure
232:digastric
230:) (named
78:Insertion
922:inferior
912:superior
889:Omohyoid
821:superior
816:inferior
754:anterior
729:Platysma
721:Cervical
510:page 391
488:mandible
470:Function
460:mandible
143:and the
141:masseter
129:(CN VII)
63:mandible
1122:Anatomy
1040:Fasciae
1022:Trachea
967:lateral
899:Pharynx
749:Scalene
711:of the
709:Muscles
295:of the
265:Anatomy
135:Actions
51:Details
1108:Portal
944:Larynx
917:middle
759:middle
620:
571:
561:
518:(1918)
416:, the
412:, the
331:tendon
226:(also
92:Artery
57:Origin
1005:vocal
804:minor
799:major
508:from
210:[
199:46291
158:Latin
109:Nerve
713:neck
618:ISBN
587:link
569:OCLC
559:ISBN
222:The
187:2160
170:TA98
610:doi
466:).
424:.
373:).
341:of
240:jaw
194:FMA
182:TA2
69:of
1134::
665:.
616:,
604:,
583:}}
579:{{
567:.
525:^
444:.
380:.
349:.
1110::
701:e
694:t
687:v
612::
589:)
575:.
371:)
369:3
214:]
86:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
