Bilateral variation of anterior belly of digastric muscle

Abstract Introduction: Digastric is a suprahyoid muscle and usually consists of two bellies. Its action consists in drawing the mental region downwards and backwards when opening the mouth, resulting in the depression of the mandible. Methods and Results: During a routine dissection of the cervical region, a muscle bundle arising from the intermediary tendon going towards the middle line was found. The supranumerary belly arised from the intermediary tendon so that some bundles inserted on the middle rafe and others continued towards the mento and inserted on the belly of mylohyoid muscle at the same side. These anatomic variations on the anterior belly of the digastric muscle could be significant during surgical procedures involving the submental region. Conclusion: Besides this surgical importance, we suggest that these supranumerary bellies have no direct action on the mandible, but on the floor of the mouth, due to its insertions on the mylohyoid muscle.

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Effect of Dysphagia Rehabilitation Using Kinesiology Taping on Oropharyngeal Muscle Hypertrophy in Post-Stroke Patients: A Double Blind Randomized Placebo-Controlled Trial

Healthcare ◽

10.3390/healthcare8040411 ◽

2020 ◽

Vol 8 (4) ◽

pp. 411

Author(s):

Young-Jin Jung ◽

Hee-Jeong Kim ◽

Jong-Bae Choi ◽

Ji-Su Park ◽

Na-Kyoung Hwang

Keyword(s):

Sham Group ◽

Digastric Muscle ◽

Stroke Patients ◽

Mylohyoid Muscle ◽

Double Blind ◽

Tongue Muscle ◽

Dysphagia Rehabilitation ◽

Anterior Belly ◽

Suprahyoid Muscle ◽

Experimental Group

Background: It has recently been shown that suprahyoid muscle exercise using kinesiology taping (KT) increases the activation of the suprahyoid muscle in healthy adults, suggesting a potential therapeutic clinical exercise for dysphagia rehabilitation. This study investigated the effect of dysphagia rehabilitation using KT in stroke patients with dysphagia. Methods: Thirty subjects in South Korea were enrolled in this prospective placebo-controlled double-blind study. Participants were randomly assigned to the experimental and sham groups. In the experimental group, the tape was attached to the hyolaryngeal complex, pulled downward with approximately 70% tension, and then attached to the sternum and the clavicle bilaterally. In the sham group, the tape was applied similarly but without the tension. Both groups performed voluntary swallowing 50 times (10 times swallowing per set, times 5 sets) a day for 4 weeks with KT applied. Outcome measures were assessed using portable ultrasound equipment. The parameter measured was the change in thickness of the tongue muscle, mylohyoid muscle, and the anterior belly of the digastric muscle. Results: The experimental group showed statistically significant changes in the thickness of the tongue muscle, mylohyoid muscle, and anterior belly of the digastric muscle than the sham group (p = 0.007, 0.002, and 0.001). Conclusion: Dysphagia rehabilitation using KT is a technique that may promote oropharyngeal muscle thickness in patients with dysphagia after stroke.

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A morphological variant of anterior belly of digastric muscle: a cadaveric case report

Bangladesh Journal of Medical Science ◽

10.3329/bjms.v16i3.32876 ◽

2017 ◽

Vol 16 (3) ◽

pp. 461-463

Author(s):

B Satheesha Nayak ◽

Srinivasa Rao S ◽

S Sudarshan ◽

AM Prasad ◽

R Deepthinath

Keyword(s):

Case Report ◽

Head And Neck ◽

Hyoid Bone ◽

Medical Science ◽

The Body ◽

Digastric Muscle ◽

Mylohyoid Muscle ◽

Anterior Belly ◽

The Right ◽

Accessory Belly

Occurrence of accessory bellies of anterior belly of digastric muscle (ABD) in the submental region is not uncommon. However reporting of different pattern of accessory bellies is of tremendous clinical significance for head and neck surgeons, radiologists and plastic surgeons. Herein we report a rare asymmetrical variant of ABD in the suprahyoid region. Accessory bellies were observed on either side of midline. On the right side accessory belly had two segments; one segment extended between the lower part of the ABD and hyoid bone, other one extended between the digastric fossa of mandible to the body of hyoid bone. On the left side accessory belly extended between mylohyoid muscle and to the lower part of the ABD.Bangladesh Journal of Medical Science Vol.16(3) 2017 p.461-463

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Ultrasound examination of swallowing disorder characteristics in patients with oncopathology of the oral cavity

Zaporozhye Medical Journal ◽

10.14739/2310-1210.2021.2.228776 ◽

2021 ◽

Vol 23 (2) ◽

pp. 236-241

Author(s):

A. O. Kushta

Keyword(s):

Oral Mucosa ◽

Malignant Tumors ◽

Contralateral Side ◽

Muscle Group ◽

Tongue Base ◽

Digastric Muscle ◽

Lateral Projection ◽

Tongue Surface ◽

Anterior Belly ◽

Longitudinal Examination

The aim of the study was to compare the dynamics of oral and oropharyngeal muscles contraction during swallowing in normal individuals and in patients with malignant tumors depending on the clinical disease using ultrasound. Materials and methods. The study included 29 patients aged 38–55 years (men), normtrophic, who were treated in the Department of Head and Neck Tumors of Podolsk Regional Oncology Center for malignant tumors of the tongue, floor of the mouth and oropharynx. Among them, there were 12 patients with cancer of the lateral tongue surface, 9 - with oral mucosa cancer and 8 – with tongue base cancer. Scanning was performed in the sagittal and frontal planes with a 7.5 MHz sensor in two modes (B and M) at rest and during swallowing in several stages on the TOSHIBA device (Model USDI-A500A/EL; Serial No. ELA14Z2082). B-mode was the main one in all the studied areas where one image frame was vertically lined up. The swallowing act was assessed in M-mode (a length of the axial movement). The obtained indicators were compared with the normal ones. Results. The work was carried out to verify the musculoskeletal complex involved in the act of swallowing. Measurements of several indicators were performed revealing a violation of the swallowing act, namely a decrease in indicators in the longitudinal and lateral examination of the sublingual muscle group in B-mode and M-mode in patients diagnosed with cancer of the tongue base and mucosa of the mouth floor. In addition, a deviation and displacement of the musculoskeletal complex to the healthy contralateral side with preserved muscle function in patients diagnosed with the lateral tongue surface cancer was revealed by M-mode ultrasound of the swallowing act. Conclusions. In patients with malignant tumors of the lateral tongue surface, the longitudinal examination of the sublingual muscle group in B-mode ultrasound showed decreased indicators by 7 % and in the lateral projection of the anterior belly of the digastric muscle in M-mode – by 3.5 times. In tongue base cancer, the mentohyoid distance was merely 4 mm reduced during the act of swallowing, and in the longitudinal projection of the sublingual muscle group - by only 5 %. In oral mucosa cancer, there was the lowest reduction in the mentohyoid distance, about 4 mm when swallowing, (in healthy people 8–12 mm) and decreased indicators in longitudinal examination of the sublingual muscle group by 8 % in B-mode, in lateral M-mode ultrasound – by 2 mm.

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Lateral Congenital Anomalies of the Pharyngeal Apparatus: Part III. Cadaveric Representation of the Course of Second and Third Cleft and Pouch Fistulas

The American Surgeon ◽

10.1177/000313481107700939 ◽

2011 ◽

Vol 77 (9) ◽

pp. 1257-1263 ◽

Cited By ~ 1

Author(s):

Petros Mirilas

Keyword(s):

Hypoglossal Nerve ◽

Thyroid Cartilage ◽

Three Dimensional ◽

Superior Laryngeal Nerve ◽

Carotid Bifurcation ◽

Preoperative Imaging ◽

Digastric Muscle ◽

Pharyngeal Apparatus ◽

Human Cadavers ◽

Anterior Belly

“Stepladder” surgery for fistula from second or third pharyngeal cleft and pouch is “blind.” Neither intraoperative methylene blue injection and probing nor preoperative imaging (fistulo-gram ultrasound, computed tomography, magnetic resonance imaging) reveal three-dimensional anatomic relations of fistulas. This article describes the most common second and third fistula courses and demonstrates representation of their tracts with wires in human cadavers. A second cleft and pouch fistula, at its external opening, pierces superficial cervical fascia (and platysma), then investing cervical fascia, and travels under the sternocleidomastoid muscle, superficial to the sternohyoid and anterior belly of omohyoid. It ascends along the carotid sheath, and at the upper border of the thyroid cartilage it pierces the pretracheal fascia. Characteristically, it courses between the carotid bifurcation and over the hypoglossal nerve. After passing beneath the posterior belly of the digastric muscle and the stylohyoid, it hooks around both glossopharyngeal nerve and stylopharyngeus muscle. The fistula reaches the pharynx below the superior constrictor muscle. The course of a third cleft and pouch fistula is similar until it has pierced pretracheal fascia; then it passes over the hypoglossal nerve and behind the internal carotid, finally descending parallel to the superior laryngeal nerve, reaching the thyrohyoid membrane cranial to the nerve.

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Botulinum toxin A injection into the anterior belly of the digastric muscle increased the posterior width of the maxillary arch in developing rats

Maxillofacial Plastic and Reconstructive Surgery ◽

10.1186/s40902-019-0203-7 ◽

2019 ◽

Vol 41 (1) ◽

Cited By ~ 1

Author(s):

Janghoon Ahn ◽

Seong-Gon Kim ◽

Min-Keun Kim ◽

Insan Jang ◽

Hyun Seok

Keyword(s):

Botulinum Toxin ◽

Botulinum Toxin A ◽

Digastric Muscle ◽

Toxin A ◽

Anterior Belly ◽

Maxillary Arch

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Morphometrics of the Anterior Belly and Intermediate Tendon of the Digastric Muscle

Journal of Craniofacial Surgery ◽

10.1097/scs.0000000000002708 ◽

2016 ◽

Vol 27 (5) ◽

pp. 1321-1326 ◽

Cited By ~ 5

Author(s):

Matthew J. Zdilla ◽

Alex R. Pancake ◽

H. Wayne Lambert

Keyword(s):

Digastric Muscle ◽

Anterior Belly

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Sublingual dermoid cysts: case report and review of the literature

The Journal of Laryngology & Otology ◽

10.1017/s0022215115001887 ◽

2015 ◽

Vol 129 (10) ◽

pp. 1036-1039 ◽

Cited By ~ 10

Author(s):

E Kyriakidou ◽

T Howe ◽

B Veale ◽

S Atkins

Keyword(s):

Differential Diagnosis ◽

Case Report ◽

Surgical Techniques ◽

Surgical Excision ◽

Cystic Lesions ◽

Review Of The Literature ◽

Mylohyoid Muscle ◽

Floor Of The Mouth ◽

Intraoral Approach ◽

History Of

AbstractBackground:Dermoid cysts in the floor of the mouth are relatively uncommon developmental lesions. They are thought to arise in the midline and along the lines of embryonic fusion of the facial processes containing ectodermal tissue.Case report:A 17-year-old female presented with a 3-month history of a growing, progressive swelling in the mouth floor. Clinical examination revealed a rather large symmetrical, soft swelling in the mouth floor, displacing the tongue superiorly. The fast growing nature and size of the lesion raised suspicion of potential compromise to the airway. Surgical excision was therefore performed.Conclusion:Differential diagnosis of cystic lesions in the floor of the mouth is of paramount importance, as the recommended surgical techniques vary depending on the anatomical position of the lesions. The intraoral approach is preferred for those lesions that do not extend beyond the mylohyoid muscle boundaries; this leads to a satisfactory cosmetic and functional outcome.

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