WEEK 10 Flashcards
where is the parotid gland located
anterior to ear
where is the submandibular gland located and describe its parts
inferior to the mandible,
2 parts are separated by the mylohyoid. the superficial is the largest and the deep is the smallest
where is the sublingual salivary gland seen?
between the mylohyoid and the mucosa of the oral cavity
the parotid gland is separated into two planes by the
facial nerve
the parotid duct emerges from
the anterior border of the parotid gland
where in the oral cavity does the parotid duct open into?
vestibule
where in the oral cavity does the submandibular gland open into?
surface of papillae on either side of the lingual frenulum
where in the oral cavity does the sublingual gland open into?
lingual folds on the papillae
describe the somatic motor pathway of the autonomic neurons
upper motor neuron goes from cerebral cortex to synapse in brainstem or spinal cord. lower motor neuron goes to effector skeletal muscle
describe the autonomic motor pathway
from brain stem or spinal cord the preganglionic fibres sunapse on a peripheral ganglion, then the post ganglionic fibres go to the effector.
describe the parasympathetic autonomic nervous system for salivary glands
secretomotor causing secretions
describe the sympathetic part for salivary glands
vasomotor, causing constriction of blood vessels to reduce secretions
pre ganglionic fibres leave the brain via
corresponding cranial nerve and its branches
pre ganglionic fibres synapse in a peripherally situated
parasympathetic ganglion
post sympathetic fibres innervate
gland
describe the general course of sympathetic fibres
preganglionic fibres leave spinal cord in upper thoracic region, synapse in superior cervical sympathetic ganglia. postganglionic fibres hitch-hike to blood vessels to innervate the gland
what is the origin of the pre ganglionic fibres of parotid gland
inferior salivary nucleus (medulla)
what carries the preganglionic fibres of the parotid gland
glossopharyngeal nerve which forms the tympanic plexus, lesser petrosal nerve and then relays the otic ganglion
what carries the post ganglionic fibres
auriculotemporal nerve to innervate the parotid gland
what is the origin of the cell bodies in sympathetic parotid gland
lateral horn of the spinal cord travels up the sympathetic trunk and synapses in the superior cervical ganglion.
describe the pathway of the post ganglionic fibres for sympathatic to parotid
form plexus around external carotid artery
describe the preganglionic pathway for parasympathetic innervation to submand and subling
originate in the superior salivatory nucleus, carried by facial nerve through chorda tympani branch that joins the lingual nerve then synapses in the submandibular region
describe the post ganglionic parasympathetic fibres for submandibular gland
unnamed branches
describe the post ganglionic parasympathetic fibres for the sublingual gland
joins the lingual to innervate sublingual
