Which of the Suprahyoid muscles forms the floor of the mouth?

All suprahyoid muscles contribute to the floor of the mouth but the actual muscle plate which bridges between the two rami of mandible is formed by the mylohyoid muscles (oral diaphragm). From above the mouth floor is reinforced by the geniohyoid muscles and from below by the anterior bellies of the digastric muscles.


Additionally, what nerve Innervates Suprahyoid muscles? Innervation: The anterior belly is innervated by the inferior alveolar nerve, a branch of the mandibular nerve (which is derived from the trigeminal nerve, CN V). The posterior belly is innervated by the digastric branch of the facial nerve.

Beside above, what are the Suprahyoid muscles?

The suprahyoid muscles are four muscles located above the hyoid bone in the neck. They are the digastric, stylohyoid, geniohyoid, and mylohyoid muscles. They are all pharyngeal muscles, with the exception of the geniohyoid muscle.

What do the hyoid muscles function in?

The infrahyoid muscles are responsible for the positioning of the hyoid bone along with the suprahyoid muscles. They play an active role in swallowing and the movement of the larynx. More specifically, all infrahyoid muscles (except the sternothyroid) depress the hyoid.

What is the floor of the mouth?

The floor of the mouth is a horizontally aligned U-shaped space situated in the part of the oral cavity that lies beneath the tongue. For purposes of surgical planning, the floor of the mouth is defined as the space between the mucosal surface and the mylohyoid muscle sling and comprising both structures (1).

What is the muscle action which would open the mouth?

The masseter elevates the jaw, closing the mouth. The temporalis elevates and retracts the jaw. The lateral pterygoid is the only muscle of mastication that actively opens the jaw.

What does the Geniohyoid do?

The geniohyoid muscle is one of the suprahyoid muscles of the neck that is innervated by the ventral ramus of C1. Geniohyoid draws the hyoid bone up and forward during mastication and assists the opening of the mandible.

What nerve controls the tongue?

hypoglossal nerve

What is oral diaphragm?

The oral diaphragm is a muscular floor of the oral cavity that bridges between the two rami of the mandible and forms from the mylohyoid muscle. The mylohyoid muscle is superior and deep to the anterior belly of the digastric muscle and deep to the stylohyoid muscle.

What does the lingual nerve supply?

The lingual nerve, which is a branch of the mandibular division of the trigeminal (nerve of the first branchial arch), carries common sensation from the anterior two-thirds. Taste is carried by the chorda tympani fibres within the lingual nerve.

What are strap muscles?

The infrahyoid muscles (strap muscles) are a group of four pairs of muscles in the anterior (frontal) part of the neck. The four infrahyoid muscles are; the sternohyoid, sternothyroid, thyrohyoid and omohyoid muscles. The infrahyoid muscles either originate from or insert on to the hyoid bone.

How many muscles attach to the hyoid bone?


Which muscles insert on the hyoid bone?

A large number of muscles attach to the hyoid: Superior. Middle pharyngeal constrictor muscle. Hyoglossus muscle. Genioglossus. Intrinsic muscles of the tongue. Suprahyoid muscles. Digastric muscle. Stylohyoid muscle. Geniohyoid muscle. Mylohyoid muscle. Inferior. Thyrohyoid muscle. Omohyoid muscle. Sternohyoid muscle.

How do I remember my hyoid muscles?

Mnemonic C: constrictor muscle (middle pharyngeal) H: hyoglossus muscle. D: digastric muscle (intermediate tendon) S: stylohyoid muscle. G: geniohyoid muscle. M: mylohyoid muscle. T: thyrohyoid muscle. O: omohyoid muscle.

What is the Stylopharyngeus muscle?

The stylopharyngeus is a muscle in the head that stretches between the temporal styloid process and the pharynx.

How do you stretch your Digastric muscle?

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.

What are the Suboccipital muscles?

Anatomical terms of muscle The suboccipital muscles are a group of muscles defined by their location to the occiput. Suboccipital muscles are located below the occipital bone. These are four paired muscles on the underside of the occipital bone; the two straight muscles (rectus) and the two oblique muscles (obliquus).