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
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- Receives corticonuclear fibers from both cerebral hemispheres \
- Supply the stylopharyngeus muscle
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- Parasympathetic nucleus (Inferior salivatory nucleus)
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- 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]
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- Sensory nucleus (Part of the nucleus of the tractus solitarius)
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- 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)
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Sensory innervations of the tongue
Taste pathway
