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30 paź 2023 · Learn about the accessory nerve (CN XI), a controversial cranial nerve that has both spinal and cranial roots. Find out its course, innervation, examination, and lesions.
The accessory nerve (CN XI) is a cranial nerve that innervates the sternocleidomastoid and trapezius muscles. It is derived from the spinal cord and the medulla, and has a variable cranial component that joins the vagus nerve.
12 paź 2023 · The accessory nerve is the eleventh paired cranial nerve. It has a purely somatic motor function, innervating the sternocleidomastoid and trapezius muscles. In this article, we shall look at the anatomy of the accessory nerve – its anatomical course, motor functions and clinical correlations.
Learn about the anatomy, function, clinical relevance and treatment of the accessory nerve (CN11), also known as the spinal accessory nerve. Find out how CN11 innervates the muscles of the shoulder girdle and how injury can affect them.
12 kwi 2019 · Cranial nerve XI is the accessory nerve, supplying somatic motor fibres to two large muscles: the sternocleidomastoid and trapezius. In this article, we look in more detail at the structure, function and clinical relevance of the accessory nerve.
This nerve supplies the sternocleidomastoid and trapezius muscles, which have the following functions: Rotation of head away from the side of the contracting sternocleidomastoid muscle. Tilting of the head toward the contracting sternocleidomastoid muscle. Flexion of the neck by both sternocleidomastoid muscles.
17 lip 2023 · The accessory spinal nerve or XI cranial nerve is essential for neck and shoulder movement, the intrinsic musculature of the larynx, and the sensitive afferences of the trapezius and sternocleidomastoid musculature.
