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Belly of digastric

Digastric: Origin, insertion, innervation and action Kenhu

Anterior Belly of Digastric Muscle Transfer: A Useful

  1. The digastric muscle is composed of two bellies, anterior and posterior, connected by an intermediate round tendon. The two bellies of the muscle have different embryonic origins and hence are supplied by different cranial nerves. Summary. origin. anterior belly: digastric fossa on the deep surface of symphysis menti of the mandibl
  2. The posterior belly of the digastric muscle is innervated by the facial nerve, aka cranial nerve VII. where is the Digastric muscle located? The digastric muscle is located in the neck, beneath the jaw. This muscle belongs to the suprahyoid muscle group, and it assists in opening and closing the jaw
  3. The digastric muscle (Latin: musculus digastricus) is a small paired muscle of the neck that stretches between the mandible and hyoid bone.It is located in the anterior compartment of the neck. Therefore, the digastric belongs to the anterior neck muscles. Also, as it is located above the hyoid bone, the digastric is classified as the suprahyoid muscle
  4. Anterior belly, intermediate tendon, and posterior belly variations were evaluated according to unilateral, bilateral and unclassified types. 10 variations were identified in the digastric muscle of 40 cadavers. Thus, five of the variations were unilateral and rest of them were bilateral. Two of the variations were residing in the central area

Posterior belly of digastric Encyclopedia Anatomy

  1. The digastric muscle consists of an anterior and posterior belly and helps to lower the mandible and open the mouth, as well as stabilise and elevate the hyoid bone with swallowing. 5 The PBD muscle is innervated by the second branch of the facial nerve after it exits the stylomastoid foramen. 6 Therefore, post paralytic facial synkinesis is likely to affect the PBD in the same way as the other muscles of facial expression. Given its location, running from the mastoid process to the hyoid.
  2. The digastric muscle functions during swallowing, chewing, and speech. The anterior belly of the digastric is one of the three suprahyoid muscles which stabilizes the hyoid during swallowing, an action critical in protecting the airway while eating. Furthermore, the digastrics work to depress the mandible for jaw opening, chewing, and speech
  3. Digastric Muscle Definition. The digastric muscle is one of few muscles containing separate muscle bellies. These two parts of the digastric muscle are separated by an intermediate rounded tendon, running through the hyoid bone.There is a digastric muscle on each side of the jaw, connecting from the jaw through the hyoid to the lower part of the skull
  4. Trigger points in the digastric muscle are palpated in the supine position. The posterior belly is palpated between the angle of the jaw and the mastoid process by applying pressure against the underlying neck structures. Trigger points in the anterior belly are palpated with the neck extended further and the head tilted back
  5. The anterior belly originates from a depression located on the posterior surface of the symphysis menti of the mandible, termed the digastric fossa. The posterior belly originates from the inferomedial surface of the mastoid process of the temporal bone in a groove termed the mastoid notch, digastric notch, or digastric groove

The hyoid can be identified in the midline and the anterior belly of the digastric can then be identified at the greater cornu superolaterally allowing for incision and drainage with less risk to the neurovascular structures both laterally and deeper to the digastric By elevating the hyoid bone, the digastric muscle depresses or lowers the mandible, helping to open the mouth and also assisting in swallowing. The name disgastric is indicative of the muscle's double-bellied structure, though other muscles in the human body also possess two or more structural bellies The digastric muscle is a small muscle located in the neck, just below the lower jaw. This muscle gets its name because it has two separate muscle bellies, an anterior belly and a posterior belly (..

Digastric Muscle - Physiopedi

The anterior digastric muscle belly (ADMB) may present significant variations of substantial surgical importance. We present an unusual complex bilateral asymmetry of an accessory ADMB found when dissecting the submental area in a 72-year-old Greek male cadaver. A rare variant was recognized in the submental area constituted by a combination of bilateral asymmetry of the ADMB with unilateral. The digastric fossa is located on the inner jaw, right behind the middle point of the chin. The posterior (back) belly of the digastric muscle originates from the mastoid process of the temporal bone The digastric muscle is one of the supra hyoid muscles that that assist in the chewing movements, usually consisting of two bellies: one anterior and other posterior, united by an intermediate tendon. This study aimed to report the presence of a previous accessory belly in digastric. The dissection was performed on a human body, adult, male, fixed and preserved in 10% formaldehyde solution. The suprahyoid muscles arethe digastric,the stylohyoid,the mylohyoid and the geniohyoid.The muscles are in following layers:1. First layer formed by digastri..

Anatomy and variations of digastric muscl

  1. Digastric has two muscle bellies that function to open the mouth. Each of the two muscle bellies of the digastric have their own referred pain pattern. The posterior (back) belly refers into the upper aspect of the sternocleidomastoid (SCM) muscle and, not quite as often, to the front of the throat, and under the chin
  2. To our knowledge, this is the first report of an absent posterior belly of the digastric muscle. The posterior belly of the digastric muscle is an important landmark in neck dissection, and its absence makes knowledge of other anatomic landmarks critically important. Laryngoscope, 131:1501-1502, 2021. Volume 131, Issue 7
  3. A series of 14 patients with permanent loss of the MMBFN during resection of head and neck tumors were treated with the anterior belly of digastric muscle transfer (ABDMT). The loss of the MMBFN occurred in isolation in five patients and formed a part of total facial nerve palsy in nine
  4. The digastric branch of facial nerve innervates the posterior belly. Anterior belly. The anterior belly originates via a indentation on the inner side of the lower margin of the mandible referred to as the digastric fossa of mandible, which is located near the symphysis and goes inferior and posterior
  5. Conclusions Anterior belly of digastric transfer for lower lip reanimation is a safe, low morbidity procedure which enhances the psychological wellbeing of patients with facial palsy

Dissection of the posterior belly of the digastric muscle. ( A ) Head of the animal in a supine position. Localize the submandibular gland (Sg), masseter muscle (M), facial nerve (VII) and. Digastric: The digastric muscle is positioned in the neck, beneath the jaw. It occupies below the body of the mandible, and extends, in a curved form, from the mastoid process to the symphysis menti. This muscle assists in opening and closing the jaw. Origin: Anterior belly - digastric fossa of the mandible. Posterior belly - [ The anterior belly goes through posterolateral inferiorly intermediate tendon to the digastric fossa on the inner face of the jaw (insert), and the posterior belly passes anteroinferiorly on the medial side of the mastoid incisure of the temporal bone (source) to the intermediate tendon, i.e, both linked by a single tendon attached to mandible, while the posterior belly of the digastric muscle (PBDM) originated from the mastoid notch of the temporal bone (Harrison et al.; Moore et al., 2014). Morphologic variations in the digastric muscle have been linked with the anomalous arches during its development

NULL. This is a Most important question of gk exam. Question is : Structures lying deep to posterior belly of digastric are all, Except , Options is : 1. Hyoglossus muscle, 2. Occipital artery, 3.Retromandibular vein, 4. Hypoglossal nerve, 5. NULL. Electronics Bazaar is one of best Online Shopping Store in India The anterior belly of the digastric muscle, as a member of the suprahyoid muscle group, is directly involved in masticatory activity, such as mastication, speech, and swallowing [16, 17]. The major role of the digastric muscle is in the opening of the mouth and depression of the mandible

Posterior Belly of the Digastric Muscle: An Important

  1. The digastric branch of facial nerve arises close to the stylomastoid foramen, and divides into several filaments, which supply the posterior belly of the Digastricus; one of these filaments joins the glossopharyngeal nerve.. References. This article incorporates text in the public domain from page 905 of the 20th edition of Gray's Anatomy (1918). External link
  2. The anterior belly of digastric muscle sits underneath the chin. It can be used by surgeons to improve the symmetry of the lower lip as there are a number of other muscles in the same area that can perform its function. As a result, you won't notice any problems with movement after the muscle has been used in this operation
  3. The posterior belly is supplied by the digastric branch of facial nerve. The digastric muscle stretches between the mastoid process of the cranium to the mandible at the chin, and part-way between, it becomes a tendon which passes through a tendinous pulley attached to the hyoid bone
  4. The anterior belly of the digastric muscle varies greatly in its shape and size. It is important to know the variation of the digastric muscle, as it is used as a landmark in certain surgical procedures, especially for surgeons operating in the submandibular and submental region. The digastric muscle is formed by tw
The digastric muscle posterior belly (DMPB) and

About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators. The Digastric is a member of the Suprahyoid Group, which is composed of the: Digastric. Mylohyoid. Geniohyoid. Stylohyoid. The Digastric has two bellies: Posterior belly and Anterior belly. The two bellies are connected to each other by the Central Tendon (aka the Intermediate Tendon), which is attached to the hyoid bone by a fibrous sling of. BTX-A injection into the anterior belly of the digastric muscle could treat patients with anterior open bite after an open reduction in the bilateral mandibular angle fractures . Radiofrequency therapy for the correction of post-traumatic open bite has similar mechanisms to BTX-A injection [ 28 ]

Digastric Muscle - Structure, Function & Pai

  1. ترجمة و معنى كلمة anterior belly of digastric muscle - قاموس المصطلحات - العربية - الإنجليزية مزيد من الخصائص وطريقة عرض أسهل.. جرب النسخة التجريبية الآ
  2. The digastric muscle is a suprahyoid muscle, consisting of two bellies (the anterior and the posterior belly), with different embryonic origins and innervation, that are joined together by an intermediate tendon
  3. Enervation of digastric anterior belly. mylohyoid nerve. enervation of digastric posterior belly. digastric nerve. Digastric posterior belly origin. mastoid notch of temporal bone. digastric posterior belly insertion. intermediate tendon on the hyoid bone. Digastric muscle anterior belly origin
  4. al aorta) where it splits into two common iliac arteries. The aortic arch begins when the ascending aorta emerges from the pericardium, passes upward, backward, and to the left, travels through the superior.
  5. The posterior belly is innervated by the digastric branch of the facial nerve. Mylohyoid. The mylohyoid is a broad, triangular shaped muscle. It forms the floor of the oral cavity and supports the floor of the mouth. Attachments: Originates from the mylohyoid line of the mandible, and attaches onto the hyoid bone

There are two main functions of the digastric muscle: depression of the lower jaw and elevation of the hyoid bone. Since the anterior belly of the digastric muscle is connected to the inner front part of the mandible, this muscle can pull the mandible down, which depresses this bone, causing the mouth to open The posterior belly of the digastric muscle begins on the surface of the skull and stretches from the mastoid process to the mandible. This muscle then becomes a tendon and attaches itself to the hyoid bone. A branch of the facial nerve known as the digastric branch is responsible for the nerve supply to this portion of the muscle

The anterior belly of the digastric muscle (ABDM) is important in a variety of surgeries including submental lipectomy, rhytidectomy, alteration of the cervicomental angle via muscle resection, the digastric corset procedure for submental rejuvenation, the submental artery flap, and reanimation of the mouth after facial nerve palsy ④ 筋三角(Muscular Triangle) A 顎二腹筋前腹(Anterior belly of digastric) B 顎二腹筋後腹(Posterior belly of digastric) C 肩甲舌骨筋の上腹(Superior belly of omohyoid) D 胸鎖乳突筋(Sternocleidomastoid) ・②を 顎下腺(Submandibular gland) 、 顔面動静脈(Facial vessels) が走行する The relationships of posterior belly of digastric are essential because 3 cranial nerves: 10th, 11th and 12th and 3 great blood vessels of neck, viz. internal jugular vein, internal and external carotid arteries pass deep to it. Differences between the Anterior and Posterior Belly of the Digastric Muscle digastric: [adjective] of, relating to, or being either of a pair of muscles that depress the lower jaw and raise the hyoid bone during swallowing The digastric muscle (also digastricus) (named digastric as it has two 'bellies') is a small muscle located under the jaw. The term digastric muscle refers to this specific muscle. However, other muscles that have two separate muscle bellies include the ligament of Treitz, omohyoid, occipitofrontalis. Contents. Structure; Posterior belly.

Digastric muscle - wikidoc

The digastric It is a muscle located in the anterior region of the neck and which is made up of two portions or bellies, one anterior and one posterior. Both are connected to each other by means of a tendon. The anterior belly of the muscle attaches to the mandible and the posterior to the temporal bone of the skull Anterior belly of digastric. Origin: mandible Insertion: lesser horn of hyoid (indirect) Action: depresses mandible, elevates hyoid. NERVE TO MYLOHYOID (V3) Posterior belly of digastric. Origin: mastoid notch of temporal bone Insertion: lesser horn of hyoid (indirect

The presence of an accessory digastric belly could modify the topographic anatomy in a neck dissection including Level I. Other surgical implications of this variant can be found in plastic and reconstructive surgery. Atamaz Pinar et al. [2] wrote about the use of a sub-men digastric definition: 1. Digastric muscles have two fleshy parts joined by a tendon (= a strong band of fibres). 2. a. Learn more The digastric muscle (named digastric as it has two bellies) is a small muscle located under the jaw.. It lies below the body of the mandible, and extends, in a curved form, from the mastoid process to the symphysis menti. It belongs to the suprahyoid muscles group. A broad aponeurotic layer is given off from the tendon of the Digastricus on either side, to be attached to the body and greater. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): The anterior belly of the digastric muscle varies greatly in shape and size. In this report, two cases of anomalies in the digastric muscle found in necropsy material belonging to the Institute of Anatomy are described. In the first case, we found a bilateral anomaly - a lateral widening of the muscle belly as an.

Anteriorly - anterior belly of the digastric muscle. Posteriorly - posterior belly of the digastric muscle. By TeachMeSeries Ltd (2022) Fig 5 - Lateral view of the neck, showing the submandibular triangle. Muscular Triangle. The muscular triangle is situated more inferiorly than the subdivisions The digastric muscle consists of the anterior belly and the posterior belly connecting the mandible, hyoid bone and temporal bone. Its unique morphology, structure and variations have drawn genuine interests in this muscle from anatomists, scientists and physicians for a long time, and the variations of the digastric muscle have been documented since the 18th century The anterior belly arose from the digastric fossa and inserted on the side of the tendinous hyoid body and the posterior belly arose from the mastoid incisura and inserted on the styloid process. A trigastric muscle, with the third head arising from the inferomedial aspect of the mandible and inserting on the intertendon has been reported Digastric Muscle Pain The muscle, having two portions separately innervated by different branches of cranial nerves and operating a complex tendon pulley, is prone to tense up. Unfortunately, tension in the anterior belly of the muscle and tension in the posterior belly do not produce the same sensation

belly of digastric was absent on the right side. On the left side, AcADM was superficial to the anterior belly of digastric. This type of unique variant digastric muscle has not been reported previously. Unilateral and bilateral variations in the anterior belly of digastric muscle can be due to deficiency in the differentiation Figure 4 Posterior belly. The posterior belly, longer than the anterior, arises on the inferior surface of the skull, from the medial surface of the mastoid process of the temporal bone and a deep groove between the mastoid process and the styloid process called the digastric groove. The posterior belly is supplied by a branch of the facial nerve.

Digastric muscle Radiology Reference Article

舌骨上三角(suprahyoid triangle):又稱頦下三角(submental triangle), 外側是the anterior belly of the Digastricus,內側是the middle line of the neck from the hyoid bone to the symphysis menti,下界是the body of the hyoid bone所形成的區域。 Mandible ; Stylohyoid m. Digastric m. Digastric m. Submaxillary triangl A normal anterior belly of the left digastric muscle is seen (yellow arrow). Figure 2. Coronal T2-weighted (left) and postcontrast T1-weighted (right) magnetic resonance imaging (MRI) brain obtained at the same hospitalization to further evaluate the intracranial vascular anomaly confirmed aplasia of the anterior belly of the right digastric muscl It is subdivided by the digastric & sup belly of omohyoid into. a. submental. b. digastric. c. carotid. d. muscular triangles a) Submental Triangle. base. hyoid core. on each side. ant belly of digastric. b) Digastric Triangle. anteroinferiorly. ant belly of digastric. posteroinferiorly. post belly of digastric Abstract. Anterior belly of the digastric muscle (ABDM) variations have been reported to occur in as few as 2.7% to as many as 69.6% of individuals. Therefore The hypoglossal nerve is the twelfth cranial nerve, or CN XII, and innervates all the extrinsic and intrinsic muscles of the tongue, except for the palatoglossus which is innervated by the vagus nerve. It is a nerve with a solely motor function.The nerve arises from the hypoglossal nucleus in the medulla as a number of small rootlets, passes through the hypoglossal canal and down through the.

What nerve Innervates posterior belly of Digastric

of the anterior digastric belly coming from the stylohioid muscle's facial branch. According to the innervation classification proposed by Sakamoto et al. (6), this variation presents digastric domi-nance, since the innervations were localized on the accessor The majority reports of anomalies of the digastric CT group, an anterior belly of digastric muscle was muscle appeared in the late 19th Century and were absent [4]. Michna [5] detected the right anterior digas- mostly reported in the French or Italian literature [7]. tric muscle had an accessory belly in one cadaver [5].. Note that the digastric bulge is greatly accentuated with neck flexion. B and D, Postoperative views show patient 1 year after face lift and cervical rejuvenation. Eighty-five percent of the anterior belly of each digastric muscle was tangentially excised digastric muscle. The anatomical variations of that muscle were bilateral and classified in the category of consistency. The right digastric had a posterior belly of 74 mm in length. The anterior bellies on the right side were two and the medial or the normal one ended on the digastric fossa. Its length was 38 mm an

Digastric Encyclopedia Anatomy

Anterior belly of the digastric muscle and the mylohyoid muscle (these are suprahyoid muscles) Tensor veli palatini; Tensor tympani; Parasympathetic Supply: Submandibular and Sublingual glands: Post-ganglionic fibres from the submandibular ganglion (derived from the facial nerve), travel with the lingual nerve to innervate these glands Figure 1.Digastric muscle. 5 Stylohyoid . The stylohyoid muscle is a thin strip of muscle, located superior to the posterior belly of the digastric muscle.. Function. Functions of the stylohyoid muscle include:. elevation of the hyoid bone superiorly and posteriorly during swallowing; depression of the mandibl jection into the anterior belly of the digastric muscle The patient underwent orthognathic surgery under seemed to prevent post-operative open bite. The pa- general anesthesia. For the maxilla, 2 mm of total impac- tient's overbite was successfully maintained for 15 tion with an additional 2 mm of posterior impaction, months post-operatively 먼저 submental & submandibular LN를 구분하게 해주는 digastric muscle (하악 이복근)의 anterior belly가 초음파영상에서 어떻게 보이는지 보겠습니다. 턱 바로 밑에서 횡단면영상을 얻으면 좌우측 mylohyoid muscle (하악 설골근)이 서로 붙어서 삼각형 모양의 단면을 이루고 있는.

Identification of the SAN, which can be found in close proximity to the meeting point of the IJV and the posterior belly of the digastric muscle. The nerve runs along the line, bisecting the right angle formed by the IJV and the posterior belly of the digastric muscle. Dissection of the SAN deep to the SCM muscle Anterior belly of digastric Posterior belly of digastric Mylohyoid Stylohyoid (thoracic aorta) and extends to the abdomen (abdominal aorta) where it splits into two common iliac arteries. The aortic arch begins when the ascending aorta emerges from the pericardium, passes upward, backward, and to the left, travels through the superior.

Variations of the digastric muscle and accessory bellies

post. belly of digastric m. auricularis superior m. auricularis posterior m. 및 occipitalis m. 마비. solitary nucleus (그림-C) 혀의 앞 2/3부분의 미각소실. Brain stem 가까이에. 위치한 얼굴신경, 중간신경 (그림-D) 얼굴근육마비, 혀앞 2/3부분의 미각소실, 혀밑 Mastoid process, sternocleidomastoid muscle, and posterior belly of the digastric muscle. Styloid process and a styloid group of muscles. The structures that enter the gland through this surface are following: Facial nerve trunk in its superior part. The external carotid artery in its inferior part. Anterior Border The Digastricus ( Digastric muscle) consists of two fleshy bellies united by an intermediate rounded tendon. It lies below the body of the mandible, and extends, in a curved form, from the mastoid process to the symphysis menti. The posterior belly, longer than the anterior, arises from the mastoid notch of the temporal bone and passes downward. To passively stretch the posterior belly of the digastric, the patient leads the head back against the practitioner in a relaxed position with the teeth nearly approximated. For stretching of the right posterior digastric, the patient's head is turned to the right to move the mastoid process away from the hyoid bone A case of bilateral variation of the anterior belly of digastric muscle detected during the routine dissection of a 55 year old male cadaver and inserted into the greater horn and body of hyoid bone is reported. Address for Correspondence: Dr. Chaithra Rao B R, Asst Prof, Dept of Anatomy, Sapthagiri Institute of Medical Sciences, no.15, Chikkasandra, Hesarghatta Main Road, Bangalore560090.

The contents of the SMS are: anterior belly of the digastric muscle, superficial portion of the sub-mandibular gland, submandibular and submental lymph nodes, facial artery and vein, fat, and the inferior loop of the hypoglossal nerve. A simplified approach to the spaces of the suprahyoid neck The digastric muscle belongs to the group of suprahyoid muscles. It is formed by two bellies: an anterior and a posterior belly. The groups of suprahyoid muscles include four muscles: the digastric, the geniohyoid, stylohyoid and mylohyoid. These muscles insert to the hyoid bone. The bellies of the digastric are joined togethe The digastric muscle's anterior accessory belly Med Oral Patol Oral Cir Bucal 2007;12:E341-3. The digastric. Breathing Modes, Body Positions, and Suprahyoid Muscle Activity. Journal of Orthodontics, Vol. 29, 2002, 307-313 SCIENTIFIC Breathing modes, body positions, and SECTION suprahyoid muscle activity S. Takahashi and Belly of Digastric Anterior Belly of Digastric Sternomastoid Trapezius Inferior belly of Omohyoid. Splenius capitis Scalenus medius Levator scapulae Anterior abdominal wall External oblique muscle Internal oblique muscle Spermatic cord Rectus abdominis muscle Anterior wall of rectus sheath Superficial Inguinal ring Oct 20, 2021 · Posterior belly: mastoid notch of temporal bone: Insertion: Body of hyoid bone (via intermediate tendon and its fibrous sling) Action: Depresses mandible Elevates hyoid bone during chewing, swallowing: Innervation: Anterior belly: mylohyoid nerve (of inferior alveolar nerve) (CN V3) Posterior belly: digastric branch of facial nerve (CN VII) Blood suppl

The carotid triangle Dr M Idris Siddiqui This is a vascular area bounded by the superior belly of the omohyoid, the posterior belly of the digastric, and the anterior border of the Sternoceidomastoid. 2. The carotid triangle • This triangle is important because the common carotid artery ascends into it. Its pulse can be auscultated or. The anterior belly of the digastric muscle originates in the digastric fossa, in the lower interior of the mandible, while the posterior belly originates in the mastoid notch, on the medial side of the mastoid process of the temporal bone. The two bellies are inserted in the body of the hyoid bone by means of a tendon

Targeted chemodenervation of the posterior belly of the

Digastric triangle. Assoc Prof Craig Hacking and Dr Arjna Kanagarajah et al. The digastric triangle is one of the paired triangles in the anterior triangle of the neck. The triangles of the neck are surgically focused, first described from early dissection-based anatomical studies which predated cross-sectional anatomical description based on. The anterior belly of the digastric muscle could be classified as a type II muscle, with a major pedicle and two minor pedicles, according to the system of Mathes and Nahai. The anterior digastric muscle can be a good alternative in obliteration of pharyngocutaneous fistulas, and defects of the mandible, including the body and angle of the. digastric translate: 二腹的, 二腹肌 . Learn more in the Cambridge English-Chinese traditional Dictionary Anatomic Variation of the Anterior Belly of Digastric Muscle and Positional Relationship between the Posterior Belly of Digastric and Stylohyoid Muscle Da Hye Kim, Hyung Joo Do, 1 Hyun Joo Kim, Sung Yoon Won, Da Yae Choi, Kyung Seok Hu, Jong Hoon Choi, 1 and Hee Jin Ki

Anatomy, Head and Neck, Digastric Muscle - StatPearls

The digastric fossa is an oval depression for the attachment of the anterior belly of the Digastricus, below the mental spines, on internal surface of body of manidble, on either side of the middle line. This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body. Morphometrics of the Anterior Belly and Intermediate Tendon of the Digastric Muscle: Sexual Dimorphism and Implications for Surgery. Zdilla MJ, Pancake AR, Lambert HW. J Craniofac Surg, 27(5):1321-1326, 01 Jul 2016 Cited by: 3 articles | PMID: 27258716 | PMCID: PMC4938752. Free to rea Anterior triangles of neck are-Submental, Digastric, Carotid, Muscular. Submental lymph nodes drain superficial tissues beliw tge chin, central part of lower lip, adjoining gums, anterior part if floor of mouth & tip of tongue. On both sides submental triangle is bounded by Anterior belly of diagastric The digastric muscle is located in the suprahyoid region on each side and frequently exhibits two muscular bellies (anterior and posterior) linked by an intermediate tendon. The paired digastric muscles act together either depressing the mandible or elevating the hyoid bone; therefore acting as a single muscle with important physiological roles

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