Glossopharyngeal nerve

Glossopharyngeal nerve nuclei & their central connections Distribution of the glossopharyngeal nerve Nuclei of the glossop...

Glossopharyngeal nerve nuclei & their central connections


Distribution of the glossopharyngeal nerve



Nuclei of the glossopharyngeal nerve

Main motor nucleus	Receives corticonuclear fibers from both cerebral hemispheres \ Supply the stylopharyngeus muscle
Parasympathetic nucleus (Inferior salivatory nucleus)	Afferents from the thalamus, olfactory system & oral cavity (Regarding information on taste) Efferent fibers to the parotid gland [Tympanic branch to Tympanic plexus to Lesser petrosal nerve to Otic ganglion to Parotid salivary gland]
Sensory nucleus (Part of the nucleus of the tractus solitarius)	Efferents on general sensation & taste from posterior 1/3 of the tongue & pharynx travel to the lower part of the post central gyrus Afferent impulses from carotid baroreceptors travel to the nucleus of the tractus solitarius NTS is connected to the dorsal motor nucleus of the vagus (Carotid sinus reflex, involves IX & X nerves in regulation of BP)

Sensory innervations of the tongue

Taste pathway