What is a function of the abducens nerve?
The abducens nerve functions to innervate the ipsilateral lateral rectus muscle and partially innervate the contralateral medial rectus muscle (at the level of the nucleus – via the medial longitudinal fasciculus).
What is the function of the Abducens and Trochlear?
The trochlear (CN IV) and abducens (CN VI) nerves are derivatives of the somatic efferent column of the basal plates of the brainstem. As such, they are pure motor nerves that are responsible for carrying general somatic efferent impulses to their end target organs.
Where does abducens nerve exit the skull?
The abducens nerve originates from neuronal cell bodies located in the ventral pons. These cells give rise to axons that course ventrally and exit the brain at the junction of the pons and the pyramid of the medulla. The nerve of each side then travels anteriorly where it pierces the dura lateral to the dorsum sellae.
What is the main function of CN VII?
The two 7th Cranial Nerves (CN VII) are located on either side of the brainstem, at the top of the medulla. They are mixed cranial nerves with BOTH sensory and motor function. CN VII controls the face and is mainly FACE MOVEMENT with some face sensation.
What is the function of the hypoglossal nerve?
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 does the abducens nerve test?
The abducens nerve is examined in conjunction with the oculomotor and trochlear nerves by testing the movements of the eye. The patient is asked to follow a point with their eyes (commonly the tip of a pen) without moving their head.
What is hypoglossal function?
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. Function.
What foramen does the abducens nerve pass through?
Cranial Nerve Review Table
| Cranial Nerve | Foramen |
|---|---|
| VI-Abducens | superior orbital fissure |
| VII-Facial (Major motor branches: Temporal, Zygomatic, Buccal, Mandibular, Cervical, and Posterior Auricular) | internal acoustic meatus-> facial canal-> stylomastoid foramen |
| facial canal-> middle ear-> chorda tympani-> petrotympanic fissure |
How does the abducens nerve move the eye?
The abducens nerve is a purely somatic motor nerve, It has no sensory function. It innervates the lateral rectus muscle, an extraocular muscles of the eye, which is responsible for the abduction of the eyes on the same (ipsilateral) side.
Is the Abducens nerve sensory or motor?
The trochlear, abducens, accessory, and hypoglossal nerves are only motor nerves; the trigeminal nerve is both sensory and motor; the oculomotor nerve is both motor and parasympathetic; the facial glossopharyngeal, and vagus nerves have sensory, motor, and parasympathetic components (Standring, 2008).
What is the responsibility of the hypoglossal nerve quizlet?
The hypoglossal nerve controls tongue movements.
What is hypoglossal nerve stimulation?
The hypoglossal nerve stimulator is an implanted medical device that reduces the occurrence of OSA by electrically stimulating the hypoglossal nerve, which causes tongue movement. This stimulation is timed with breathing to relieve upper airway obstruction.
What is the function of the abducens nerve?
The function of the abducens nerve is quite simple and straightforward: 1 It moves the eye outward (abduction) so you can look to the side. 2 Via the contralateral medial rectus muscle, it coordinates the simultaneous side-to-side movement of your eyes. More
What are the clinical features of abducens nerve palsy?
Clinical features of abducens nerve palsy include diplopia, the affected eye resting in adduction (due to unopposed activity of the medial rectus), and inability to abduct the eye. The patient may attempt to compensate by rotating their head to allow the eye to look sideways.
Is the trochlear nerve the same as the abducens nerve?
The trochlear nerve is the fourth of the twelve cranial nerves, whereas the abducens nerve is the sixth. They both consist of afferent and efferent motoric fibers.