Which of the following cranial nerves carries only motor information?

Índice Show

References[edit]
Which cranial nerve carries only motor information?
Which cranial nerves have motor functions only quizlet?
Do cranial nerves carry motor information?
Which of the following nerve is purely motor?

Hole's Human Anatomy and Physiology

13th EditionDavid N. Shier, Jackie L. Butler, Ricki Lewis

1,402 solutions

Mader's Understanding Human Anatomy and Physiology

10th EditionSusannah Longenbaker

1,331 solutions

Anatomy and Physiology: The Unity of Form and Function

9th EditionKenneth Saladin

2,065 solutions

Seeley's Anatomy and Physiology

12th EditionAndrew Russo, Cinnamon VanPutte, Jennifer Regan

2,712 solutions

The cranial nerves are numbered sequentially in relation to their position from the front of the brain to the back. There are 12 pairs of cranial nerves which emerge from the underside of the brain and pass through the foramina in the base of the skull. Cranial nerves I, II, and VIII are pure sensory nerves. Cranial nerves III, IV, VI, XI, and XII are pure motor nerves. Cranial nerves V, VII, IX, and X are mixed sensory and motor nerves.

The olfactory nerve (CN I) contains special sensory neurons concerned with smell.
The optic nerve (CN II) contains sensory neurons dedicated to vision.
The oculomotor nerve (CN III) provides motor function for all eye muscles except those supplied by cranial nerves IV and VI.
The trochlear nerve (CN IV) provides motor function to the superior oblique muscle of the eye.
The trigeminal nerve (CN V) is the principal sensory supply to the head (face, teeth, sinuses, etc.); it also provides motor function to the muscles of mastication.
The abducens nerve (CN VI) provides motor function to the lateral rectus muscle of the eye.
The facial nerve (CN VII) provides motor innervation to the muscles of facial expression, lacrimal gland, submaxillary gland, sublingual gland, as well as sensory supply to the anterior two-thirds of the tongue.
The acoustic nerve (CN VIII), also known as the vestibulocochlear nerve, provides sensory innervation for hearing and equilibrium.
The glossopharyngeal nerve (CN IX) provides motor innervation to the pharyngeal musculature and sensory function to the posterior one-third of the tongue and pharynx.
The vagus nerve (CN X) provides motor innervation to the heart, lungs, and gastrointestinal tract. It also provides sensory innervation to the heart, respiratory tract, gastrointestinal tract, and external ear.
The accessory nerve (CN XI) provides motor function to the sternocleidomastoid and trapezius muscles.
The hypoglossal nerve (CN XII) is a pure motor nerve that innervates the muscles of the tongue.

No.	Name	Sensory, motor, or both	Origin/Target	Exited manner	Function[1]
0	Terminal	?	Lamina terminalis	Located in the cribriform plate of the ethmoid bone.	Animal research indicates that the terminal nerve is involved in the detection of pheromones.[2]
I	Olfactory	Purely sensory	Telencephalon	Located in the olfactory foramina in the cribriform plate of the ethmoid bone.	Transmits the sense of smell from the nasal cavity.[3]
II	Optic	Sensory	Retinal ganglion cells	Located in the optic canal.	Transmits visual signals from the retina of the eye to the brain.[4]
III	Oculomotor	Mainly motor	Anterior aspect of Midbrain	Located in the superior orbital fissure.	Innervates the levator palpebrae superioris, superior rectus, medial rectus, inferior rectus, and inferior oblique, which collectively perform most eye movements. Also innervates the sphincter pupillae and the muscles of the ciliary body.
IV	Trochlear	Motor	Dorsal aspect of Midbrain	Located in the superior orbital fissure.	Innervates the superior oblique muscle, which depresses, abducts, and intorts the eyeball.
V	Trigeminal	Both sensory and motor	Pons	Three Parts: V1 (ophthalmic nerve) is located in the superior orbital fissure V2 (maxillary nerve) is located in the foramen rotundum V3 (mandibular nerve) is located in the foramen ovale.	Receives sensation from the face and innervates the muscles of mastication.
VI	Abducens	Mainly motor	Nuclei lying under the floor of the fourth ventricle Pons	Located in the superior orbital fissure.	Innervates the lateral rectus, which abducts the eye.
VII	Facial	Both sensory and motor	Pons (cerebellopontine angle) above olive	Located in and runs through the internal acoustic canal to the facial canal and exits at the stylomastoid foramen.	Provides motor innervation to the muscles of facial expression, posterior belly of the digastric muscle, stylohyoid muscle, and stapedius muscle. Also receives the special sense of taste from the anterior 2/3 of the tongue and provides secretomotorinnervation to the salivary glands (except parotid) and the lacrimal gland.
VIII	Vestibulocochlear In older texts: auditory, acoustic.	Mostly sensory	Lateral to CN VII (cerebellopontine angle)	Located in the internal acoustic canal.	Mediates sensation of sound, rotation, and gravity (essential for balance and movement). More specifically, the vestibular branch carries impulses for equilibrium and the cochlear branch carries impulses for hearing.
IX	Glossopharyngeal	Both sensory and motor	Medulla	Located in the jugular foramen.	Receives taste from the posterior 1/3 of the tongue, provides secretomotor innervation to the parotid gland, and provides motor innervation to the stylopharyngeus. Some sensation is also relayed to the brain from the palatine tonsils. This nerve is involved together with the vagus nerve in the gag reflex.
X	Vagus	Both sensory and motor	Posterolateral sulcus of Medulla	Located in the jugular foramen.	Supplies branchiomotor innervation to most laryngeal and pharyngeal muscles (except the stylopharyngeus, which is innervated by the glossopharyngeal). Also provides parasympathetic fibers to nearly all thoracic and abdominal viscera down to the splenic flexure. Receives the special sense of taste from the epiglottis. A major function: controls muscles for voice and resonance and the soft palate. Symptoms of damage: dysphagia (swallowing problems), velopharyngeal insufficiency. This nerve is involved (together with nerve IX) in the pharyngeal reflex or gag reflex.
XI	Accessory Sometimes: cranial accessory, spinal accessory.	Mainly motor	Cranial and Spinal Roots	Located in the jugular foramen.	Controls the sternocleidomastoid and trapezius muscles, and overlaps with functions of the vagus nerve (CN X). Symptoms of damage: inability to shrug, weak head movement.
XII	Hypoglossal	Mainly motor	Medulla	Located in the hypoglossal canal.	Provides motor innervation to the muscles of the tongue (except for the palatoglossal muscle, which is innervated by the vagus nerve) and other glossal muscles. Important for swallowing (bolus formation) and speech articulation.

References[edit]

^ "Cranial Nerves - Function, Table, Anatomy and FAQs".
^ Butler, Ann B.; Hodos, William (2005). Comparative Vertebrate Neuroanatomy: Evolution and Adaptation. John Wiley & Sons. p. 605. ISBN 978-0-471-73383-6.
^ McCracken, Thomas (2000). New Atlas of Human Anatomy. China: MetroBooks. pp. 1–240. ISBN 1-58663-097-0.
^ McCracken, Thomass (2000). New Atlas of Human Anatomy. China: MetroBooks. pp. 1–240. ISBN 1-58663-097-0.

Which cranial nerve carries only motor information?

Cranial nerves III, IV, VI, XI, and XII are pure motor nerves.

Which cranial nerves have motor functions only quizlet?

The only three cranial nerves that are purely sensory neurons include Olfactory (smell), Optic(sight), and Acoustic (hearing). Cranial nerves that are involved in motor movement only, include Vagus, spinal, hypoglossal, abducens, and trochlear.

Do cranial nerves carry motor information?

In fact, three cranial nerves carry purely sensory information and four cranial nerves carry almost entirely somatic motor information. The remaining cranial nerves carry some combination of sensory, somatic motor and parasympathetic information.