The sublingual space is bounded between the mylohyoid muscle and the geniohyoid and genioglossus muscles.
What muscle Innervates the geniohyoid?
The hypoglossal nerve innervates the geniohyoid (GH) muscle, the intrinsic muscles of the tongue, and the extrinsic muscles of the tongue, i.e., the genioglossus muscle (medial branch), the styloglossus (SG), and hyoglossus (HG) muscles (lateral branch) (Fig. 109.2).
What is the origin of geniohyoid muscle?
Origin. The geniohyoid is a paired slender ribbon of muscle that originates from the inferior mental spine on the posterior surface of the mandibular symphysis.
What is the genioglossus?
The genioglossus muscle is a fan-shaped muscle that is involved in forming most of the tongue mass. It emerges from the superior mental spines and inserts on the hyoid bone as well as the inferior portion of the tongue. [1] The genioglossus muscle divides into four main parts: Anterior.
Why is it called Geniohyoid?
The geniohyoid muscle is a narrow muscle situated superior to the medial border of the mylohyoid muscle. It is named for its passage from the chin (genio- is a standard prefix for chin) to the hyoid bone.
What nerve Innervates the stylohyoid?
Nerve supply derives from the second pharyngeal arches (facial nerve). It is the stylohyoid branch of the facial nerve (cranial nerve VII) that innervates this muscle. Sometimes, the nerve towards the posterior belly of the digastric (branch of the facial nerve) also gives a branch to the stylohyoid muscle.
What is the sternohyoid?
The sternohyoid is a paired, flat strap of muscle that serves to fix the hyoid bone as well as depressing the larynx in phonation and in the terminal phase of swallowing.
What is Sternothyroid?
Medical Definition of sternothyroid : an infrahyoid muscle on each side of the body below the sternohyoid that arises from the sternum and from the cartilage of the first and sometimes of the second ribs, inserts into the thyroid cartilage, and acts to draw the larynx downward by depressing the thyroid cartilage.
What is the Hyoglossus muscle?
The hyoglossus muscle is a thin, quadrilaterally shaped muscle in the upper neck and the floor of the mouth. It is one of the extrinsic muscles of the tongue. The submandibular ganglion suspended from the lingual nerve sits on it.
What Innervates the Thyrohyoid muscle?
The thyrohyoid muscles are innervated by a branch of the ventral ramus of C1 from the cervical plexus, which courses with the hypoglossal nerve. The nerve fibers are thus not from the hypoglossal nucleus.
What is Sternothyroid muscle?
The sternothyroid muscle is an infrahyoid muscle of the neck that is innervated by the ansa cervicalis of the cervical plexus receiving fibers from the ventral rami of C1-C3 spinal nerves.
What is a Platysma muscle?
The platysma is a broad muscle which arises from the fascia that covers the upper segments of the deltoid and pectoralis muscles. Its thin muscle fibers cross over the clavicle and proceed obliquely superiorly, laterally and medially over the neck.
Where does the genioglossus attach?
The genioglossus muscle is attached to the lingual surface of the mandible at the geniotubercle and also to the hyoid complex just above the larynx. Movement forward of either or both of these anatomic structures stabilizes the tongue base along with the associated pharyngeal dilatators.
Why is genioglossus Called Life Saving muscle?
Bcoz genioglossus helps in protruding the tongue. … It keeps the tongue protruded. If the person falls unconscious or if u observe an epileptic attack, then the pt’s tongue may fall back due to temporary loss of motor control on tongue muscle.
Does the genioglossus move the mandible?
Contraction of the genioglossus stabilizes and enlarges the portion of the upper airway that is most vulnerable to collapse. … Given this connection, the mandible can be pulled forward to maximise the airway space, and prevent the tongue from sinking backwards under anaesthesia and obstructing the airway.
What are the tongue muscles?
The four extrinsic muscles originate from bone and extend to the tongue. They are the genioglossus, the hyoglossus (often including the chondroglossus) the styloglossus, and the palatoglossus.
What Innervates the Digastric muscle?
The anterior belly of the digastric receives innervation from the mylohyoid nerve. The mylohyoid nerve is a branch of the inferior alveolar nerve, which arises from the mandibular branch of the trigeminal nerve. … [6] The facial nerve provides nerve supply to the posterior belly of the digastric.
What is the hypoglossal?
The hypoglossal nerve enables tongue movement. It controls the hyoglossus, intrinsic, genioglossus and styloglossus muscles. These muscles help you speak, swallow and move substances around in your mouth.
What is Eagle’s syndrome?
Eagle syndrome is characterized by recurrent pain in the middle part of the throat (oropharynx) and face. Classic Eagle syndrome is typically seen in patients after throat trauma or tonsillectomy. Symptoms include dull and persistent throat pain that may radiate to the ear and worsen with rotation of the head.
What is Suprahyoid?
The suprahyoid muscles are those above or superior to the hyoid bones of the neck. They elevate the hyoid bone when the mandible is fixed in place, and lower the mandible when the hyoid is held firm by muscles beneath it.
Which tendon penetrates the stylohyoid muscle?
intermediate tendon The two bellies meet as the intermediate tendon, which penetrates the stylohyoid muscle and also passes through the fibrous loop which is attached to the body and greater cornu of the hyoid bone [10,11].
How do you treat Sternocleidomastoid pain?
Pain management: Rest, ice, heat, and nonsteroidal anti-inflammatory drugs may help reduce pain. Some people find that alternating heat and ice is helpful. Physical therapy: Physical therapy can help a person regain strength in the neck and head. It can also help prevent chronic injuries.
What bones does the Sternocleidomastoid connect to?
The manubrium is part of the sternum and forms the anterior wall of the thoracic cage; it also serves as the attachment point for several muscles. … Sternocleidomastoid Attachments.
| Origin | Insertion |
|---|---|
| Superior border/anterior surface of medial third of clavicle | Nuchal line of occipital bone |
What does the sternocleidomastoid muscle do?
Function. Rotation of the head to the opposite side or obliquely rotate the head. It also flexes the neck. When acting together it flexes the neck and extends the head.
Where does the Sternothyroid muscle attach?
Sternothyroid muscle
| Origin | Posterior surface of manubrium of sternum, Costal cartilage of rib 1 |
|---|---|
| Insertion | Oblique line of thyroid cartilage |
| Action | Depress the larynx |
| Innervation | Anterior rami of C1-3 (via the ansa cervicalis) |
| Blood supply | Superior thyroid and lingual arteries |
Where is sternohyoid?
The sternohyoid muscle is one of the paired strap muscles of the infrahyoid muscles. It arises from the posterior border of the medial end of the clavicle, the posterior sternoclavicular ligament, and the upper and posterior part of the manubrium of the sternum.
Is the sternothyroid connected to the hyoid bone?
The sternohyoid, sternothyroid, and sternocleidomastoid muscles originate at the manubrium. The sternohyoid muscle runs from the dorsal manubrium to the ventrocaudal hyoid bone, with attachments to the sternoclavicular joint capsule, and the sternothyroid muscle attaches along the dorsal midline of the manubrium.
What is the function of the hyoglossus?
Function. The hyoglossus depresses and retracts the tongue and makes the dorsum more convex.
What is the hyoglossus muscle of the tongue?
The hyoglossus muscle is a thin, quadrilaterally shaped muscle in the upper neck and the floor of the mouth. It is one of the extrinsic muscles of the tongue. The submandibular ganglion suspended from the lingual nerve sits on it.
What is the submandibular triangle?
The submandibular triangle, also known as the digastric triangle, is bounded anteriorly by the anterior belly of the digastric muscle, posteriorly by the posterior belly of the digastric muscle, superiorly by the mandible, and inferiorly by the mylohyoid and hypoglossus muscles.
Graduated from ENSAT (national agronomic school of Toulouse) in plant sciences in 2018, I pursued a CIFRE doctorate under contract with Sun’Agri and INRAE in Avignon between 2019 and 2022. My thesis aimed to study dynamic agrivoltaic systems, in my case in arboriculture. I love to write and share science related Stuff Here on my Website. I am currently continuing at Sun’Agri as an R&D engineer.