The muscles innervated directly by the XI nerve are the trapezius and the sternocleidomastoid, in addition to the laryngeal musculature (in collaboration with the vagus nerve), such as the palatal, pharyngeal, laryngeal muscles.

What does cranial nerve 11 assess?

11th Cranial nerve The 11th (spinal accessory) cranial nerve is evaluated by testing the muscles it supplies: For the sternocleidomastoid, the patient is asked to turn the head against resistance supplied by the examiner’s hand while the examiner palpates the active muscle (opposite the turned head).

What cranial nerve supplies the muscles?

Your hypoglossal nerve is the 12th cranial nerve which is responsible for the movement of most of the muscles in your tongue.

What muscles does cranial nerve 12 innervate?

• Genioglossus muscles, which push the tongue forward.
• Hyoglossus muscles that pull the tongue back and flatten it.
• Intrinsic muscles that change the tongue’s shape, including curving and narrowing.
• Styloglossus muscles, which move the tongue up and down.

Is cranial nerve 11 sensory or motor?

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.

Which muscle is innervated by the XII hypoglossal nerve?

Hypoglossal Nerve Stimulation The hypoglossal nerve (cranial nerve XII) innervates both the tongue protrusor (genioglossus) and retrusor (styloglossus and hyoglossus) muscles through its medial and lateral divisions.

Which head neck muscle is innervated by a cranial nerve?

Sternocleidomastoid and trapezius muscles are innervated by the lower part of cranial nerve XI (Standring, 2008).

What nerve Innervates the palatoglossus muscle?

All the other muscles of the tongue derive from the occipital myotomes. This is the reason that all the other tongue muscles receive innervation from the twelfth cranial nerve (hypoglossal nerve) except the palatoglossus muscle, which is innervated by the tenth cranial nerve (vagus nerve).

What nerve innervates the sternocleidomastoid?

The muscles innervated directly by the XI nerve are the trapezius and the sternocleidomastoid, in addition to the laryngeal musculature (in collaboration with the vagus nerve), such as the palatal, pharyngeal, laryngeal muscles.

What is the XI nerve?

Anatomical terms of neuroanatomy The accessory nerve is a cranial nerve that supplies the sternocleidomastoid and trapezius muscles. It is considered as the eleventh of twelve pairs of cranial nerves, or simply cranial nerve XI, as part of it was formerly believed to originate in the brain.

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Is the trapezius muscle?

The trapezius is a large muscle in your back. It starts at the base of your neck and extends across your shoulders and down to the middle of your back. Providers call it the trapezius because of its shape. It looks like a trapezoid (a shape with four sides, two that are parallel).

What is the function of the Glossopharyngeal nerve?

Structure and Function The glossopharyngeal nerve carries sensory, efferent motor, and parasympathetic fibers. Its branches consist of tympanic, tonsillar, stylopharyngeal, carotid sinus nerve, branches to the tongue, lingual branches, and a communicating branch to cranial nerve X (vagus nerve).

What are the cranial muscles?

MuscleOriginOccipitalfrontalisFrontal Belly: Epicranial aponeurosis Occipital Belly: Superior nuchal line of occipital boneTemporalisTemporal fossa; Temporal fasciaTemporoparietalisFascia superior to the auricular

Which muscles is innervated by cranial nerve VII?

The motor portion, or the facial nerve proper, supplies all the facial musculature. The principal muscles are the frontalis, orbicularis oculi, buccinator, orbicularis oris, platysma, the posterior belly of the digastric, and the stapedius muscle.

Which extraocular muscles are innervated by CN III?

The CN III innervates the levator palpebrae superioris, the superior rectus muscle, the inferior rectus muscle, the medial rectus muscle, the inferior oblique muscle, the sphincter pupillae, and the ciliary muscle.

What do the cranial nerves innervate?

Cranial nerves supply sensory and motor information to structures of the head and neck, controlling the activity of this region. Only the vagus nerve extends beyond the neck, to innervate thoracic and abdominal viscera.

Which muscle is innervated by the tibial nerve?

In addition to the two heads of the gastrocnemius muscle, the tibial nerve innervates the plantaris, soleus, popliteus, posterior tibialis, flexor digitorum longus, and flexor hallucis longus muscles (Fig. 1).

Which cranial nerve innervates the sternocleidomastoid and trapezius quizlet?

The spinal accessory nerve is a motor nerve that innervates the sternocleidomastoid and trapezius muscles.

What muscles are innervated by cranial nerve 5?

This branch supplies motor innervation to the facial muscles involved in mastication which include the masseter, temporalis muscle, and the lateral and medial pterygoids.

Are any skeletal muscles innervated by cranial nerves?

Skeletal muscles that arise from the branchial arches are innervated by fibres of cranial nerves V, VII, IX, and X; these are classified as special visceral efferent fibres. The cranial nerves (I–XII) and their areas of innervation.

What muscle does cranial nerve 6?

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 is hypoglossal canal?

Hypoglossal canals are tunnels through the anterior part of the base (therefore superior in placement) of each condyle. From: The Human Bone Manual, 2005.

Is cranial nerve 12 motor or sensory?

No.NameSensory, motor, or bothIXGlossopharyngealBoth sensory and motorXVagusBoth sensory and motorXIAccessory Sometimes: cranial accessory, spinal accessory.Mainly motorXIIHypoglossalMainly motor

What is hypoglossal XII?

The Hypoglossal Nerve is the 12th Cranial Nerve (Cranial Nerve XII). It is mainly an efferent nerve for the tongue musculature. The nerve originates from the medulla and travels caudally and dorsally to the tongue.

What nerve innervates the deltoid?

After exiting the quadrangular space posteriorly, the anterior branch of the axillary nerve wraps around the surgical neck of the humerus, with the posterior humeral circumflex artery, to then innervate the deltoid muscle.

What does C2 nerve innervate?

C1, C2, and C3 (the first three cervical nerves) help control the head and neck, including movements forward, backward, and to the sides. The C2 dermatome handles sensation for the upper part of the head, and the C3 dermatome covers the side of the face and back of the head.

What muscle forms the posterior Faucial pillars?

The posterior faucial pillar is formed by the palatopharyngeal muscle. It originates from the posterolateral part of the soft palate and runs downward and laterally to insert into the pharyngeal constrictor muscle and the thyroid cartilage of the larynx.

What is between the Palatoglossus and Palatopharyngeus?

Structure. It is separated from the palatoglossus muscle by an angular interval, in which the palatine tonsil is lodged. … The anterior fasciculus, the thicker, lies in the soft palate between the levator and tensor veli palatini muscles, and joins in the middle line the corresponding part of the opposite muscle.

Why is Palatoglossus innervated by vagus?

Palatoglossus muscleNerveVagus nerve (via pharyngeal branch to pharyngeal plexus)ActionsRaising the back part of the tongueIdentifiers

What is the trapezius innervated by?

Cranial nerve XI innervates the motor function of the trapezius. The function of the trapezius is to stabilize and move the scapula.

What does the Abducens nerve do?

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).