What does the nucleus Ambiguus give rise to?

This nucleus gives rise to the branchial efferent motor fibers of the vagus nerve (CN X) terminating in the laryngeal, pharyngeal muscles, and musculus uvulae; as well as to the efferent motor fibers of the glossopharyngeal nerve (CN IX) terminating in the stylopharyngeus muscle.

What is the nucleus Solitarius?

The visceral sensory part of the brainstem has a single nucleus found in the medulla oblongata, the nucleus solitarius, which is located lateral to the motor nucleus of the vagus nerve. At the center of the nucleus, a bundle of nerve fibers runs through it to innervate the nucleus, which is the tractus solitarius.

Is nucleus Ambiguus bilateral?

Unilateral damage to the lower motor (nucleus ambiguus) neurons produces an ipsilateral paralysis of the palate, pharynx and larynx. These fibers complete reflex arcs controlling swallowing, coughing, vomiting and control laryngeal motor output. The cortical input to the nucleus ambiguus is bilateral and indirect.

What cranial nerves are related to the nucleus of the tractus solitarius?

The nucleus tractus solitarius and associated tract receives special and general visceral afferents via the facial (CN VII), glossopharyngeal (CN IX) and vagus (CN X) nerves. Remember these nerves quickly by using the mnemonic “Non Stop Training” (Ninth, Seventh, Tenth).

What do you need to know about cranial nerve palsies?

Cranial nerve palsies. Summary. Cranial nerve palsy is characterized by a decreased or complete loss of function of one or more . The etiology may be congenital or acquired. Multiple cranial neuropathies are common, particularly in lesions arising from tumors, trauma, impaired blood flow, and infections.

What causes multiple cranial nerve palsies or Amboss?

Multiple cranial neuropathies are commonly seen in lesions caused by tumors, trauma, ischemia, and infections. While a diagnosis can usually be made based on clinical features, further investigation is often warranted to determine the specific etiology, which should determine the course of treatment.

Where does the cranial nerve 11 originate from?

The Spinal Accessory Nerve (SAN) or Cranial Nerve 11 is termed a cranial nerve as it was originally believed to originate in the brain.

Is the cranial nerve part of the vagus nerve?

Accessory Nerve Cranial Nerve 11. Contents. Description. 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 if the cranial part is really a part of the SAN or part of the vagus nerve.