Definitions for accessory nerve
ac·ces·so·ry nerve

Princeton's WordNetRate this definition:0.0 / 0 votes

1. accessory nerve, spinal accessory, nervus accessorius, eleventh cranial nervenoun

   arises from two sets of roots (cranial and spinal) that unite to form the nerve

WikipediaRate this definition:0.0 / 0 votes

1. Accessory nerve

   The accessory nerve, also known as the eleventh cranial nerve, cranial nerve XI, or simply CN XI, is a cranial nerve that supplies the sternocleidomastoid and trapezius muscles. It is classified as the eleventh of twelve pairs of cranial nerves because part of it was formerly believed to originate in the brain. The sternocleidomastoid muscle tilts and rotates the head, whereas the trapezius muscle, connecting to the scapula, acts to shrug the shoulder. Traditional descriptions of the accessory nerve divide it into a spinal part and a cranial part. The cranial component rapidly joins the vagus nerve, and there is ongoing debate about whether the cranial part should be considered part of the accessory nerve proper. Consequently, the term "accessory nerve" usually refers only to nerve supplying the sternocleidomastoid and trapezius muscles, also called the spinal accessory nerve.Strength testing of these muscles can be measured during a neurological examination to assess function of the spinal accessory nerve. Poor strength or limited movement are suggestive of damage, 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. Injury can cause wasting of the shoulder muscles, winging of the scapula, and weakness of shoulder abduction and external rotation.The accessory nerve is derived from the basal plate of the embryonic spinal segments C1–C6.

ChatGPTRate this definition:0.0 / 0 votes

1. accessory nerve

   The accessory nerve, also known as the eleventh cranial nerve, is a pair of nerves in the human body that control specific muscles in the neck and shoulders, including the trapezius and sternocleidomastoid muscles. It has both cranial and spinal parts, with the spinal part enabling movement and the cranial part assisting with swallowing and speech.

WikidataRate this definition:0.0 / 0 votes

1. Accessory nerve

   In anatomy, the accessory nerve is a nerve that controls specific muscles of the shoulder and neck. As 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. Traditional descriptions of the accessory nerve divide it into two parts: a spinal part and a cranial part. 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. 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.

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Accessory Nerve

   The 11th cranial nerve. The accessory nerve originates from neurons in the medulla and in the cervical spinal cord. It has a cranial root, which joins the vagus (10th cranial) nerve and sends motor fibers to the muscles of the larynx, and a spinal root, which sends motor fibers to the trapezius and the sternocleidomastoid muscles. Damage to the nerve produces weakness in head rotation and shoulder elevation.

Matched Categories

1. • Cranial Nerve

How to pronounce accessory nerve?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say accessory nerve in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of accessory nerve in Chaldean Numerology is: 6

2. Pythagorean Numerology

   The numerical value of accessory nerve in Pythagorean Numerology is: 1

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=accessory nerve
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Accessory_Nerve
3. ^ ChatGPT
   https://chat.openai.com
4. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=accessory nerve