What is the location and function of the styloid process?
What is the location and function of the styloid process?
The styloid process is a slender pointed piece of bone just below the ear. It projects down and forward from the inferior surface of the temporal bone, and serves as an anchor point for several muscles associated with the tongue and larynx.
What does the styloid muscle do?
Function. The stylohyoid muscle elevates and retracts hyoid bone. It initiates a swallowing action by pulling the hyoid bone in a posterior and superior direction.
Is stylohyoid muscle facial expression?
It contains predominantly somatic motor axons supplying muscles of the face and scalp, ear, posterior belly of the digastric muscle, and stylohyoid muscle. In particular, motor neurons of the facial nucleus control the muscles of the forehead, lips, and cheeks, which together are called muscles of facial expression.
What is the Stylohyoid muscle?
The stylohyoid muscle (musculus stylohyoideus in Latin) is one of the suprahyoid muscles of the neck that stretches between the base of the skull and the hyoid bone. The stylohyoid is paired and narrow muscle in close proximity to the digastric muscle, extending along the superior border of its posterior belly.
What does the stylohyoid ligament do?
The stylohyoid ligament forms part of the styloid apparatus. The origin is at the styloid process of the temporal bone and it inserts into lesser horn of the hyoid bone. The stylohyoid ligament provides part of the origin for the middle pharyngeal constrictor muscle and styloglossus muscle.
What is the action of stylohyoid muscle?
The stylohyoid muscle connects the hyoid bone to the base of the skull, and it pulls the hyoid bone upward and backward, resulting in elevation of the base of the tongue and elongation of the floor of the mouth. This movement helps in deglutition and this muscle functions in association with other suprahyoid muscles.
Why is styloid process important?
The styloid process gives origin to three muscles, the styloglossus, stylohyoid, and stylopharyngeus. The styloglossus receives innervation from CN XII, attaches to the apex of the tongue, and draws up the sides of the tongue to form a conduit that facilitates swallowing.
What are the 5 muscles of facial expression?
Frontalis.
What nerve Innervates the stylohyoid?
the facial nerve
Stylohyoid receives innervation from the stylohyoid branch of the facial nerve (Cranial nerve 7). The branch arises right after the facial nerve passes the mastoid process of temporal bone to enter the middle part of the muscle.
What is the stylohyoid muscle?
Stylohyoid is a paired muscle located in the anterior triangle of the neck. It is part of the suprahyoid muscle group which connects the hyoid bone to the mandible and skull. There are four suprahyoid muscles in total, the other three being the mylohyoid, geniohyoid and digastric muscles.
Where is the stylohyoid muscle located?
neck
Stylohyoid is a paired muscle located in the anterior triangle of the neck. It is part of the suprahyoid muscle group which connects the hyoid bone to the mandible and skull.
What muscle raises the eyebrows?
frontalis muscle
The frontalis muscle is responsible for elevating the eyebrows, while the corrugator supercilii, orbicularis oculi, and procerus play a role in its depression.
What muscle is used in smiling?
zygomaticus major muscles
A, the orbicularis oculi and zygomaticus major muscles during smiling.
Why does my stylohyoid muscle hurt?
Pathologic conditions associated with the stylohyoid muscle may result in cervical and pharyngeal symptoms such as neck pain laterally in the area of the angle of the mandible, submandibular space, and anterior upper neck. The pain may get exacerbated by movements such as speaking, swallowing, yawning, or head-turning.
What is stylohyoid innervated by?
Stylohyoid receives innervation from the stylohyoid branch of the facial nerve (Cranial nerve 7). The branch arises right after the facial nerve passes the mastoid process of temporal bone to enter the middle part of the muscle.
What is the main action of a suprahyoid muscle?
The suprahyoid musculature includes the geniohyoid, mylohyoid, stylohyoid, hyoglossus, and the anterior belly of the digastric muscle. These muscles attach to the superior aspect of the hyoid bone, and their main combined function is to elevate the hyoid and larynx and move them superiorly and anteriorly.
What muscles used in kissing?
Orbicularis oris muscle along with the buccinator and pharyngeal constrictor form a functional unit, known as “buccinator mechanism” which has an important role in orofacial function (swallowing, sucking, whistling, chewing, vowel pronunciation, kissing).
The stylohyoid muscle is extremely variable. In certain individuals it can be absent, while in others it can be doubled. When present, the muscle is located superior to the hyoid bone in the anterior triangle of the neck. It forms the superior border of the carotid triangle together with the posterior belly of the digastric muscle.
What happens when the stylohyoid muscle contracts?
Contraction of the stylohyoid muscle results in elevation and retraction (posterior movement) of the hyoid bone. As the muscle takes part in forming the floor of the mouth, this action also results in tongue retraction and lengthening the floor of the mouth.
Where does the stylohyoid receive its blood supply?
Stylohyoid receives its blood supply from branches of the facial, posterior auricular and occipital arteries (branches of the external carotid artery) For Marginal Mandibular Nerve Palsy, stylohyoid muscle transfer is a possible second surgical option whereas the digastric muscle is the most preferred option.
Where does the stylohyoid attach to the temporal bone?
Stylohyoid. Attachments: Arises from the styloid process of the temporal bone and attaches to the lateral aspect of the hyoid bone. Actions: Initiates a swallowing action by pulling the hyoid bone in a posterior and superior direction. Innervation: Stylohyoid branch of the facial nerve (CN VII). This arises proximally to the parotid gland.
