What is the action of the Pterygoids?
| Lateral pterygoid muscle | |
|---|---|
| Artery | Pterygoid branches of maxillary artery |
| Nerve | Lateral pterygoid nerve from the mandibular nerve |
| Actions | Depresses and Protrude mandible, side to side movement of mandible |
| Identifiers |
What nerve Innervates pterygoid muscle?
The lateral pterygoid muscle receives innervation from the mandibular branch of cranial nerve V (trigeminal nerve). The main trunk of the mandibular nerve divides into the anterior and the posterior division. The anterior division gives off three motor branches.
What Innervates medial pterygoid?
[2] The nerve to medial pterygoid is given off from the medial surface of the mandibular nerve. It travels through the otic ganglion (without synapsing) and gives motor innervation to the medial pterygoid muscle.
What is the function of medial pterygoid muscle?
The function of medial pterygoid, while contracting bilaterally, it produces elevation and protrusion of the mandible, while unilaterally contracted, it produces contralateral excursion (Neumann, 2010; Okeson, 2013). It pulls the ramus of the mandible medially and shifting the mandible toward to the contralateral side.
What nerve Innervates temporalis muscle?
Motor branches of the trigeminal nerve innervated the temporalis: the deep temporal nerves of the mandibular nerve (98 percent, central part), branches of the buccal nerve (95 percent, anterior part), and branches of the masseteric nerve (69 percent, posterior part).
Where is the Pterygoid process?
Two pairs of bony plates, the pterygoid processes, arise from the base of each alisphenoid bone. The outer plates are nearly horizontal in position. They extend from the posterior end of the maxillary bone caudad and laterad to the lateral surface of the tympanic bulla.
What is the V3 nerve?
The Mandibular Nerve (V3) As the terminal branch of the inferior alveolar nerve, the mental nerve enters the face through the mental foramen and supplies the skin of the lower lip. The auriculotemporal nerve innervates the skin behind the temporomandibular joint and within the superior surface of the parotid gland.
What artery supplies the medial and lateral pterygoid muscles?
Blood Supply and Lymphatics The medial pterygoid muscle receives vascular supply from the maxillary artery through its pterygoid branches and by the facial artery through its muscular branches.
What is medial pterygoid plate?
The medial pterygoid plate (or medial pterygoid lamina) of the sphenoid bone is a horse-shoe shaped process that arises from its underside. The anterior margin of the plate articulates with the posterior border of the vertical part of the palatine bone. In many animals it is a separate bone called the pterygoid bone.
What nerve innervates the orbicularis oculi?
The orbicularis oculi are innervated by the seventh cranial nerve, the facial nerve.
What nerve Innervates Sternohyoid muscle?
The sternohyoid 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.
How is the lateral pterygoid muscle supplied by nerves?
Lateral pterygoid muscle 1 Innervation. The muscle is supplied by the paired nerves to lateral pterygoid (one for each head) which arise deep to the muscle from the anterior division of the mandibular nerve 2 Action. The superior part is active during retrusion (opposite of protrusion) and ipsilateral jaw movement. 3 Variant Anatomy
How does the motor innervation of the tongue work?
These muscles affect the shape and size of the tongue – for example, in tongue rolling – and have a role in facilitating speech, eating and swallowing. Motor innervation for the intrinsic muscles of the tongue is via the hypoglossal nerve (CNXII). Attachments: Arises from the mandibular symphsis.
Where are the intrinsic muscles of the tongue located?
Motor innervation for the intrinsic muscles of the tongue is via the hypoglossal nerve (CNXII). Extrinsic Muscles. The extrinsic muscles are as follows: Genioglossus. Attachments: Arises from the mandibular symphsis. Inserts into the body of the hyoid bone and the entire length of the tongue.
Is the medial pterygoid part of the mandibular nerve?
Medial pterygoid is innervated by nerve to medial pterygoid (a branch of the mandibular nerve), which also innervates tensor tympani and tensor veli palatini.