COM2 anataomy W6 Part 2 Flashcards
(43 cards)
Name the 3 main nuclei that the facial nerve contains
- Main motor nucleus
-Parasympathetic nucleus
-Sensory nucleus
Explain the main motor nucleus of the facial nerve:
-location
-What it supplys
-What fibers the upper and lower face recieves
- Reticular formation of the lower pons
-Muscles of facial expression, stapedius, posterior belly of digastric, stylohyoid
-upper face: Recieves bilateral corticnuclear fibers
-Lower face: recieves controalateral fibers
Explain the parasympathetic nuclei of the facial nerve:
-location
-What it includes + what those supply
-Where it recieves inputs from
- Posterolateral to the motr nucles
-Superior salivatiry nucleus- submandibular, and sublingual glands, nasal and palatine glnads
-Lacrimal nucleus- Lacrimal gland
Inputs from: Hypothalamus, nucles of solitary tract and trigeminal nerve sensory nuclei
Explain the sensory nucleus of the facial nerve :
-What is it apart
-Function- what does it process
-Location of its cell bodies
-in its pathway were does it end
Part of upper portion of nucleus of tractus solitarius
-Processes taste from anterior 2/3 of tounge, soft palate, floor of mouth
-Cell bodies in geniculate ganglion
-Ends in gustatory cortex( lower postcentral gyrus)
Explain the course of the facial nerve :
-Starting from exit
-passes through
-Enters
-forms what
-turns above the
-exits what via what
-Exits the brainstem
-passes through internal acoustic meatus
-Enters the facial canal in temporal bone
-Forms geniculate ganaglion
-Turns abve the promontory
-Exits skull via stylomastoid foramen
What type of nerve is vestibulocochlear-8
special Sensory
Name the 2 components of the vestibulocochlear nerve and what they are for
- Vestibular nerve - for balance and head movements
-Cochlear nerve - for hearing
Where does the vestibulochochlear nerve as a whole
-arise from
-pass through
-Then enters what and splits into what and where do they go to
Arises from pontomedullary junction
-Passes through internal acoustic meatus
-Enters the inner ear
-Splits into:
-Vestibular nerve -utricle, saccule and semicircular canals
-Cochlear nerve - cochlea
Explain the vestibular nerve of the vestibulocochlear nerve:
-Where it carries impulses from + the functions of those
- Carries impulses from :
-Utricle and saccule- for head position
-Semicircular canals- head movements
Explain the pathway of the vestivular nerve in the vestibuocochlear nerve:
-where peripheral fibers come from
-Location of cell bodie
-What eneters where + GOes to what
-Then what is divided and into what
-Peripheral fibers from utricle,saccule and canals
-Cell bodies in vestibular ganglion
-Their central processes enter the brainstem and goes to the 4 vestibular nuclei: lateral,medial,superior and inferior
-Then the fibers divided into : short ascending and long ascending
Where do efferent from the vestibular nuclei go to
- Cerebellum
spinal cord
Eye movement nuclei
Thalamus
What is the function of the cochlear nerve in the vestibulocochlear
-what does it carry+
pathway:
-Where do peripheral fibers come from
-cell body location
-What enters where
-And wher do some fibers go + others
Carries sound signals from the organ of corti
pathway:
-Peripheral fibers from hair cells of organ of cort
-cell bodies in spiral ganglion
-Their central process enter brainstem and some fibers go to Anterior cochlear nucleus+ others posterior cochlear nucleus
What type of nerve is the glossopharyngeal nerve
Motor+ sensory+ parasympathetic
Name the 3 nuclei the glossopharyngel nerve contains
-Main motor nucleus
-Parasympathetic nucleus
-Sensory nucleus
Explain the main motor nucleus of the Glosspharyngeal nerve :
-location
-What is it apart of
-Whtere does it recieve input from
-Function- what does it supply
- Loacted in the reticular formation of the medulla oblongata
-It is apart of the nucleus ambiguus
-Recievec inout from coticonuclear fibers
-Supplys the Stylopharyngeus muscles
Explain the parasympathetic nucelus of the glosspharyngeal nerve:
-Its alternative name
- Where its loacted
-Where it recieves inputs from
-Function-what does it stimulate
name: inferior salivatory nucleus
Location: medulla
-Recieves input from : hypothalmus, olfactory system
-Supplies Partoid salivary gland
Explain the sensory nucleus of the glossopharyngeal nerve:
-What is it apart of
-Name the 3 types of sensations it carries and from where
- Apart of the nucleus of teh tractus solitarius
- Taste+ general fromm the posteriro 1/3 of the tounge
-Viscerall sensations from carotid sinus
Explain the glosspharyngeal nerve:
what does it exit the skull via
+ descend into
-
-Exits skull via jugular foramen
-descend into cartoid sheath
What is the vagus
- Mixed nerve
Name the 3 nuclei the vagus nerve contains
- Main motor nucleus
-Parasympathetic nucleus
-Sensory nucleus
Explain the main motor nucleus of Vagus nerve:
-Location
-What its part of
-Function- what does it supply
-Reticular formation of the medulla oblongata
-Part of nucleus ambiguus
-Supplies constrictor muscles of the pharynx and intrinsic muscles of larynx
Explain the parasympathtic nucleus of the vagus nerve:
-Alternative name
-Location
-What does it supply
-
- Dorsal nucles of the vagus
-Posterolateral to the hypoglossal nucleus
-Supplies smooth muscles of bronchi, heart intestines
Explain the sensory nucleus of the vagus nerve:
-Function- where does it carry sensatins of taste from
-Whats it apart of
Taste from epigglottis and pharynx
-Lower nucleus of the tractus solitarius`
Explain the pathway of the vagus nerve:
-Where it emerges from , between what
-What it leaves + through what
- Emerges from medulla bwteen the olives and inferiro cerebellar peduncle
-Leaves the skull through jugular foramen
