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27 Cards in this Set
- Front
- Back
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Name 12 cranial nerves
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CN I - Olfactory
CN II - Optic CN III - Oculomotor CN IV - Trochlear CN V - Trigeminal CN VI - Abducens CN VII - Facial CN VIII - Vestibulocochlear CN IX - Glossopharyngeal CN X - Vagus CN XI - Accesory spinal CN XII - Hypoglossal |
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GSA fibers carry _
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Pain, temperature, touch from skin, proprioceptive info from body wall, joints, tendons
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GVA fibers carry_
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Pain info from epithelium lined visceral structures
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GSE fibers carry _
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motor impulses to skeletal muscles
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GVE fibers carry
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autonomic control on glandular secretion
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SVA fibers carry_
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Smell, taste
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SVE fibers carry _
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-motor control to skeletal muscles of pharynx, larynx, muscles of mastication and facial expression
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SSA fibers carry _
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Hearing, vision, balance
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SSE fibers carry
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change sensory input to ear
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CN's that are strictly sensory
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CN I, II, VIII
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CN's that are both sensory and motor
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V, VII, IX, X
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CN's that are motor only
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III, IV, VI, XI, XII
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Identify cranial nerves that posess sensory ganglia
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I - olfactory receptor neurons
II - retinal ganglion cells V - trigeminal ganglion VII - geniculate ganglion VIII - vestibular ganglion, spiral ganglion IX - superior and inferior ganglia X - superior and inferior ganglia |
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Identify cranial nerves that have parasympathetic ganglia in their pathway
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CN III - (accessory nucleus of oculomotor nerve) - through ciliary ganglion to sphincter pupillae
CN VII (superior salivatory nucleus nerve) - to ptertgoplatine ganglion to innervate lacrimal, nasal, pharyngeal, palatine glands, also uses submandibular ganglion to innervate sublingual and submandibular salivary glands CN IX (inferior salivatory nucleus) - innervation of parotid gland CN X - posterior nucleus of vagus nerve - thoracic and abdominal viscera |
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Olfactory nerve component and what innervates
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Sense of smell - SVA
Because it assists the body in preparing for eating by causing reflex salivation and increase in gastric motility, it is called visceral afferent |
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Optic nerve - components and what innervates
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SSA - afferent fibers of retina, primary receptor for sense of sight
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Oculomotor nerve - components and what innervates
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GSE + GVE - p
GSE - motor component innervates extraocular muscles which assist in rotational movements of the globe GVE - p - parasympathetic innervation of intra ocular muscles of the eye responsible for changing shape of lens for accomodation and pupil constriction, via INFERIOR DIVISION OF CN III and CILIARY GANLION |
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Trochlear nerve - components and what innervates
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GSE - innervation of one extraocular muscle - SUPERIOR OBLIQUE
Because this muscle utilizes a pulley to carry out this action - nerve carries name of pulley - trochlea |
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Trigeminal nerve - components and what innervates
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GSA + SVE
GSA - major sensory nerve of the head, innervates portion of the scalp, most of face, cornea, epithelium of nasal cavity, paranasal sinuses, oral cavity, skin of outer ear, external auditory meatus, external surface of tympanic membrane, cranial dural matter, also proprioceptive fibers to ALL skeletal muscles of head SVE - motor to muscles that come from arches, especially 1st arch - muscles of mastication, mylohyoid, anterior belly of digastric, tensor veli palatine, tensor tympani |
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Does trigeminal nerve has its own GVE - p fibers
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No, because it distributes to majority structures of head and face, however it carries GVE - P fibers of CN's VII and IX to glands of head - both mucous and salivary
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Abducens - components and what innervates
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GSE - innervation of one extraocular muscle - LATERAL RECTUS
Named for ability to " abduct" (bring laterally) eye |
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Facial - components and what innervates
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SVE, GSA, SVA, GVA, GVE - p
SVE - motor innervation to skeletal muscles that come from arches - especially 2nd arch - muscles of facial expression, stylohyoid, posterior belly of digastric muscle, stapedius GSA - sensory to portion of external ear and external meatus SVA- taste to anterior 2/3 of tongue via CHORDA TYMPANI GVA - sensory to upper most portion of pharynx GVE - p - parasympathetic to lacrimal gland, nasal , palatel, oral and pharyngeal mucous glands via GREATER PETROSAL NERVE and PTERYGOPALATINE GANGLION to submandibular and sublingual salivary glands via CHORDA TYMPANI and SUBMANDIBULAR GANGLION |
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Vestibulocochlear - components and what innervates
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SSA + SSE
SSA - afferent fibers from organ of Corti for hearing afferent fibers from semicircular canals, utricle and macula of internal ear - equilibrium SSE - motor fibers related to modifying auditory input |
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Glossopharyngeal - components and what innervates
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SVE - motor innervation to skeletal muscles that come from arches - arch III - stylopharyngeus
GSA - sensory to portion of skin of external ear SVA - taste from posterior 1/3 of tongue GVA - sensory to epithelium of endodermal origin which lines majority of pharynx, middle ear, internal tympanic membrane, parotid gland, carotid sinus GVE -p - secretory fibers to parotid gland via LESSER PETROSAL NERVE abd OTIC GANGLION |
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Vagus - components and what innervates
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SVE - muscles of arches IV and VI, muscles of pharynx, larynx and upper portion of esophagus (also CN XI)
GSA - cutaneous innervation to external ear, meatus, dura mater of posterior cranial fossa SVA - taste from lingual surface of epiglottis GVA - sensory innervation of epithelium of root of tongue, larynx, respiratory, heart, gut, gonads GVE -p - smooth muscle of gut, respiratory and cardiac muscle |
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Spinal accesory - components and what innervates
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SVE - arches IV and VI, cant distinguish from CN XI
GSE - motor to sternocleidomastoid and trapezius |
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Hypoglossal - components and what innervates
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GSE - motor to muscles of tongue - styloglossus, genioglossus, hyoglossus, and intrinsic muscles
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