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What cranial nerve is also known as the accessory nerve?
The accessory nerve is also known as cranial nerve XI. It is primarily responsible for innervating the sternocleidomastoid and trapezius muscles, facilitating shoulder elevation and head rotation. The nerve has both cranial and spinal components, with its cranial part originating from the brainstem and the spinal part arising from the upper cervical spinal cord.
What is the 12 pairs of peripheral nerves that branch out from the brain?
You are speaking of the 12 cranial nerves:I. Olfactory nerve which branches out of the telencephalonII. Optic which branches out of the diencephalonIII. Oculomotor nerve which branches out of the mesencephalonIV. Trochlear nerve nerve which branches out of the mesencephalonV. Trigeminal nerve which branches out of the ponsVI. Abducens nerve which branches out of the ponsVII. Facial nerve which branches out of the ponsVIII. Vestibulochochlear nerve which branches out of the ponsIX. Glossopharangeal nerve nerve which branches out of the medullaX. Vagus nerve nerve which branches out of the medullaXI. Accessory nerve nerve which branches out of the medulla & cervical spineXII. Hypoglossal nerve nerve which branches out of the medulla
What two prominent muscles have been affected if your right accessory nerve was severed in an accident and there was muscle atrophy?
When a nerve is cut, the muscle that communicates with the brain along that nerve no longer functions. this results in atrophy, the muscle thinning. It may not be repairable since the nerves degenerate when they get cut. If the surgeon says a nerve graft is doable, then there can be good sucess with a repair.
Where do chemical messages originate from?
Chemical messages, also known as neurotransmitters, originate from the nerve cells in the brain or other parts of the nervous system. These chemical messengers are released at synapses, which are the junctions between nerve cells, to transmit signals from one nerve cell to another. Different neurotransmitters have specific functions and play a crucial role in regulating various physiological and cognitive processes in the body.
What cranial nerve passes through the foramen magnum?
olfactroy olfactroyOlfactory nerves Olfactory nerves
Which cranial nerve in the diencephalon?
Accessory nerve
What cranial nerve motor fibers to sternocleidomastoid and trapezius?
The sternocleidomastoid and trapezius muscles are controlled by the accessory cranial nerve. Some call it cranial nerve XI.
What is the spinal accessory nerve?
spinal accessory nerve (a nerve that helps control speech, swallowing, and certain movements of the head and neck)
What contains the cranial nerve and spinal nerve?
Spinal Accessory Nerve
What cranial nerve is used when rotating the head?
The spinal accessory nerve, or cranial nerve XI (eleven), is a purely motor nerve which innervates the trapezius and sternocleidomastoid muscles. The sternocleidomastoid muscles are used to turn the head. The Accessory nerve also provides somatic motor fibers to muscles of the soft palate, pharynx, and larynx (spinal and medullary fibers respectively.)
Who protects the spinal cords?
In anatomy, the accessory nerve is a nerve that controls specific muscles of the neck. As a part of it was formerly believed to originate in the brain, it is considered a cranial nerve. Based on its location relative to other such nerves, it is designated the eleventh of twelve cranial nerves, and is thus abbreviated CN XI. Although anatomists typically refer to the accessory nerve in singular, there are in reality two accessory nerves, one on each side of the body.Traditional descriptions of the accessory nerve divide it into two parts: a spinal part and a cranial part.[1] But because the cranial component rapidly joins the vagus nerve and serves the same function as other vagal nerve fibers, modern descriptions often consider the cranial component part of the vagus nerve and not part of the accessory nerve proper.[2] Thus in contemporary discussions of the accessory nerve, the common practice is to dismiss the cranial part altogether, referring to the accessory nerve specifically as the spinal accessory nerve.The spinal accessory nerve provides motor innervation from the central nervous system to two muscles of the neck: the sternocleidomastoid muscle and the trapezius muscle. The sternocleidomastoid muscle tilts and rotates the head, while the trapezius muscle has several actions on the scapula, including shoulder elevation and adduction of the scapula.Range of motion and strength testing of the neck and shoulders can be measured during a neurological examination to assess function of the spinal accessory nerve. Limited range of motion or poor muscle strength are suggestive of damage to the spinal accessory nerve, which can result from a variety of causes. Injury to the spinal accessory nerve is most commonly caused by medical procedures that involve the head and neck.[3]
Which muscles are affected by the right accessory nerve?
The sternocleidomastoid muscle (SCM) and the trapezius muscle are innervated by the accessory nerve (CN XI)
Which cranial nerve lies medial to the vagus nerve?
That would be the hypoglossal nerve, which lies medial from the vagus, accessory, glossopharyngeal nerves.
Which nerve is responsible for regulating visceral activity?
Spinal accessory
What is the difference between a nerve dendrite and a nerve axon structurally?
The nerve axon is the main nerve from where the dendrites originate.
What cranial nerve is also known as the accessory nerve?
The accessory nerve is also known as cranial nerve XI. It is primarily responsible for innervating the sternocleidomastoid and trapezius muscles, facilitating shoulder elevation and head rotation. The nerve has both cranial and spinal components, with its cranial part originating from the brainstem and the spinal part arising from the upper cervical spinal cord.
Which nerves pass through the jugular foramen?
The nerves which passes through the jugular foramen are: glossopharyngeal nerve(IX), vagus nerve(X) and accessory nerve(XI).
