What happens if cranial nerve 11 is damaged?
Supranuclear lesions of the eleventh nerve cause moderate, often transient, impairment of function of the sternocleidomastoid and trapezius muscles, due to the bilateral innervation. In the spinal cord the nuclei can be involved in amyotrophic lateral sclerosis, syringomyelia, polio, and intraspinal tumors.
What does cranial nerve 11 assess?
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).
Why was there a dispute about CN XI being a cranial nerve?
The accessory nerve (CN XI) is probably one of the most controversial of the twelve cranial nerves. This discord surrounds the observation that nerve fibers arising from the cranial nucleus are only briefly associated with those coming from the spinal nucleus, before continuing with other cranial nerves.
What muscles does cranial nerve 11 innervate?
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 muscles does the left CN XI innervate?
What happens when cranial nerve 12 is damaged?
The hypoglossal nerve can be damaged at the hypoglossal nucleus (nuclear), above the hypoglossal nucleus (supranuclear), or interrupted at the motor axons (infranuclear). Such damage causes paralysis, fasciculations (as noted by a scalloped appearance of the tongue), and eventual atrophy of the tongue muscles.
What is the name of Cranial nerve XI?
spinal accessory nerve
The spinal accessory nerve, also called accessory nerve, is the eleventh cranial nerve (CN XI) and is composed of two parts, the cranial part and the spinal part.
What autoimmune diseases cause trigeminal neuralgia?
Most common medical disorder that can affect trigeminal nerve are “autoimmune disorder”. Condition like lupus, Sjogren syndrome, scleroderma and mix connective tissue disorder have tendency to attack trigeminal nerve and cause facial pain.