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30 paź 2023 · This spinal accessory nucleus (also called the accessory nucleus proper) rarely extends beyond C5 but has been observed as low as C7. The rootlets eventually coalesce to form a solitary nerve fiber known as the spinal accessory 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.
The Spinal Accessory Nerve (SAN) or Cranial Nerve 11 is termed a cranial nerve as it was originally believed to originate in the brain. It has both a cranial and a spinal part, though debate still rages regarding whether the cranial part is a part of the SAN or part of the vagus nerve.
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.
12 kwi 2019 · CN XI is the accessory nerve. It originates in the medulla oblongata and superior cervical cord region. It provides special visceral efferent fibres to the trapezius and sternocleidomastoid. It exits the spinal cord in the neck and enters the skull through the foramen magnum.
The accessory nerve (CN XI) is a motor (efferent) nerve supplying the sternocleidomastoid and trapezius muscles. Twelve cranial nerves, their exit points, anatomical course, branches and topography.
Nuclei: Nucleus ambiguus, Spinal accessory nucleus . Function: 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. Located in the jugular foramen. Description: The accessory nerve consists of two parts: a cranial and a spinal.
