The abducens nerve is the sixth paired cranial nerve. It has a purely somatic motor function – providing innervation to the lateral rectus muscle.
What is the Abducens nerve?
Cranial nerve six (CN VI), also known as the abducens nerve, is one of the nerves responsible for the extraocular motor functions of the eye, along with the oculomotor nerve (CN III) and the trochlear nerve (CN IV).
Which cranial nerve is sensory and motor?
Trigeminal Nerve (V)
The trigeminal nerve has both sensory and motor functions.
Which cranial nerve is purely motor?
Cranial nerves XI, the spinal accessory nerve, and XII, the hypoglossal nerve, are purely motor and innervate the muscles of the neck that are used to turn the head (the sternocleidomastoid and upper part of the trapezius) and the muscles of the tongue, respectively.
Which cranial nerves have motor functions only?
Cranial nerve VIII, Acoustovestibular, modulates hearing and balance. There are four cranial nerves with primarily motor function. Link to Corticobulbar. CN IV, Trochlear, innervates the superior oblique muscle of the eyeball.
What is the sixth nerve?
The sixth cranial nerve sends signals to your lateral rectus muscle. This is a small muscle that attaches to the outer side of your eye. When this muscle contracts, your eye moves away from your nose. Each eye has its own lateral rectus muscle served by its own cranial nerve.
What symptoms characterize Abducens nerve damage?
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 cranial nerve 3 sensory or motor?
Table of cranial nerves
|No.||Name||Sensory, motor, or both|
|V||Trigeminal||Both sensory and motor|
What is the only cranial nerve to extend beyond the head neck region?
Vagus nerve (CN X) is the only cranial nerve that innervates the structures beyond the head and neck region.
Which is the smallest nerve in human body?
The trochlear nerve is unique among the cranial nerves in several respects: It is the smallest nerve in terms of the number of axons it contains. It has the greatest intracranial length.
What nerve is responsible for hearing?
The vestibular nerve is primarily responsible for maintaining body balance and eye movements, while the cochlear nerve is responsible for hearing.
Is the accessory nerve sensory or motor?
The accessory nerve is the eleventh paired cranial nerve. It has a purely somatic motor function, innervating the sternocleidomastoid and trapezius muscles.
What is the largest cranial nerve?
The trigeminal nerve is the largest and most complex of the 12 cranial nerves (CNs). It supplies sensations to the face, mucous membranes, and other structures of the head. It is the motor nerve for the muscles of mastication and contains proprioceptive fibers.
What is the shortest cranial nerve?
The trochlear nerve is the fourth paired cranial nerve. It is the smallest cranial nerve (by number of axons), yet has the longest intracranial course.
Which cranial nerve is responsible for swallowing?
The cranial nerves associated with the swallowing process are the trigeminal (V), facial (VII), glossopharyngeal (IX), vagus (X), accessory (XI) – usually not considered – and hypoglossal (XII).