Why is it called mylohyoid?
The mylohyoid muscle or diaphragma oris is a paired muscle of the neck. It runs from the mandible to the hyoid bone, forming the floor of the oral cavity of the mouth. It is named after its two attachments near the molar teeth. It elevates the hyoid bone and the tongue, important during swallowing and speaking.
What does the Mylohyoid line do?
Function. The mylohyoid line is the site of attachment of many muscles, including the mylohyoid muscle, and the superior pharyngeal constrictor muscle. It is also the site of attachment of the pterygomandibular raphe.
Where is the mylohyoid ridge located?
mandible
A ridge on the inner surface of the mandible extending upward and backward on either side from the lower part of the symphysis of the mandible. It provides attachment to the mylohoid muscle and the lowermost part of the superior constrictor of the pharynx.
What is a mylohyoid raphe?
The mylohyoid raphe extends from the symphysis menti of mandible to the body of hyoid bone. It might be absent in some individuals. In that case the mylohyoid muscle fibers either blend with the anterior belly of digastric muscle, or the left and right mylohyoid muscles fuse with each other.
What is Ramus of mandible?
The rami are two vertical processes located on either side of the body; they join the body at the angle of the mandible. At the superior aspect of each ramus, the coronoid and condylar processes articulate with the temporal bone to create the temporomandibular joint which permits mobility.
What is Lingula of mandible?
The lingula of the mandible is a tongue-shaped bony projection on the medial surface of the mandibular ramus that forms the medial boundary of the mandibular foramen.1 The lingula is a reliable anatomic landmark used to determine the position of the mandibular foramen.2 Due to the close proximity of the lingula to the …
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.
Is mylohyoid superficial to Geniohyoid?
Relations. The paired geniohyoid muscles lie adjacent to one another and are immediately superior to the mylohyoid muscles on the floor of the mouth and inferior to the genioglossus muscles that form the roof of the mouth.
What causes mylohyoid pain?
Pain or discomfort in the digastric muscle may be related to muscle tears and sprains or injuries due to overuse. Some conditions which may affect the digastric muscle include myopathy, atrophy, infectious myositis, lacerations, contusions or neuromuscular diseases.
How do you relax the 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 does Mylo meaning anatomy?
It is a flat and triangular muscle that originates from the mandible near the molars hence the prefix “mylo” (Greek for molars) and inserts on the hyoid bone. The mylohyoid mainly functions to elevate the hyoid bone, elevate the oral cavity, and depress the mandible.
What Innervates the Stylohyoid muscle?
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.
Where does the mylohyoid originate in the body?
Origin and insertion Mylohyoid is a sheet like muscle, originating from the entire length of the mylohyoid line on the inner surface of mandible. It courses inferomedially, with its fibers inserting onto the mylohyoid raphe (median fibrous raphe) and superior aspect of body of hyoid bone.
Where is the mylohyoid line on the mandible?
Anatomical terms of bone. The mylohyoid line is a line on the inside of the mandible. It extends superior and posterior (upward and backward) on either side from the lower part of the symphysis of the mandible.
Is the mylohyoid a muscle or a suprahyoid?
It is a pharyngeal muscle (derived from the first pharyngeal arch) and classified as one of the suprahyoid muscles. Together, the paired mylohyoid muscles form a muscular floor for the oral cavity of the mouth.
Where do the mylohyoid and hyoglossus muscles unite?
The medial fibres of the two mylohyoid muscles unite in a midline raphe (where the two muscles intermesh). The mylohyoid muscle separates the sublingual space from the submandibular space, which communicate via a lateral gap between the mylohyoid and hyoglossus muscles at the posterior free margin of mylohyoid muscle.