University:
Indiana University South Bend
Course:
ANAT-A 210 | Human Anatomy
Academic year:

2021
Views:

15

Pages:

1
Author:

Rose G

Jugular foramen VAGUS NERVE 1 Posterior XI X Spinal root of accessory Carotid body nerve. Makes a plexus with IX Vagus continuing. Parasympathetic to pulmonary & oesophageal brs & to coeliac, hepatic & renal plexuses. Carries general visceral afferents from all these organs 1. Dorsal nucleus of vagus. General visceral efferent (parasympathetic) to smooth muscle of bronchi, heart, oesophagus, intestine to transverse colon. General visceral afferent (sensory) from above organs. 3. Nucleus solitarius. Sensory for baroreceptors and taste. Superior vagal ganglion cell bodies: 1. Meningeal br. Sensory to posterior cranial fossa 2. Auricular br. Sensory to external auditory meatus & part of eardrum (communicates with VII) Inferior vagal ganglion - cell bodies: 1. Special visceral afferent (baroreceptors & taste) 2. General visceral afferent (detects stretch in heart, lungs, abdominal contents, pharynx & larynx Recurrent laryngeal n. 1. Branchiomotor to muscles of larynx & upper oesophagus 2. Somatic sensory to larynx below cords 3. General visceral afferents from larynx & pharynx for stretch Vagus arises from 8-10 rootlets on medulla. Associated nuclei are: 2. Nucleus ambiguus. Branchiomotor supply to striated muscle of palate, pharynx, larynx & upper oesophagus (these fibres originate from the cranial root of accessory). 4. Spinal nucleus of trigeminal nerve. All somatic sensory fibres in vagus end here.