Intro CN Flashcards
What does GSA stand for
general somatic afferent
what are the types of GSAs
exteroceptive and proprioceptive
what are exteroceptive impulses
pain temperature touch from epithelium of ectodermal origin
what are proprioceptive impulses
sensory endings in body wall, tendons and joints
What does GVA stand for
general visceral afferent
what are general visceral afferents
fibers carrying sensory impulses like pain from viscera within body lined by epithelium of endodermal origin
Where are special afferent fibers found
in cranial nn
what are the 2 types of special afferents
special somatic afferent SSA
special visceral afferent SVA
what type of afferents carry vision, hearing and quilibrium
special somatic afferents
what type of afferents carry smell and taste
special visceral afferent
What does GSE stand for
general somatic efferent
what fibers are GSE
fibers with motor impulses to somatic (skeletal) muscle
what does GVE stand for
general visceral efferent
what fibers are GVE
autonomic fibers that inn smooth m of gut, vasculature and cardiac mm, and gibers for glandular secretion
what are the subdivisions of GVE
sympathetic and parasympathetic
what type of nerves have GVE
spinal and some cranial nn
What are the 2 types of special efferents
special visceral efferent SVE
special somatic efferent SSE
What nn are special visceral efferents
nn that inn skel m from visceral arch mesoderm like the mm of mastication, facial expressionm pharynx, palate and larynx
what type of nn fibers can reflexively influence sensory input to the ear
special somatic efferent SSE
What CN are PAN
III VII IX X
what CN carry special visceral efferents
V, VII IX X
What CN carry special somatic efferents
VIII
what nn carry somatic general efferents
CN III IV VI XI XII and all spinal nn
What are the proprioceptive CN that are afferent somatic general sensory
CN V and all spinal nn
what are the exteroceptive nn that are sensory afferent somatic
all spinal
V VII IX X
what are the special somatic sensors afferent CN
VIII(vestibular)-proprioceptive II VIII(cochlear)- exteroceptive
what are the sensory afferent visceral nn
all spinal
CN VII IX and X
what are the special sensory visceral CN
smell is CN I
taste is CN VII IX X
What is CN I and type of fibers and modality
olfactory, SVA, sensory
What is CN II and type of fibers and modality
optic, SSA, sensory
What is CN III and type of fibers and modality
oculomotor, GSE, GVE-parasympathetic, motor
What is CN IV and type of fibers and modality
trochlear, GSE and motor
What is CN V and type of fibers and modality
trigeminal, GSA and SVE, both
What is CN VI and type of fibers and modality
abducens, GSE and motor
What is CN VII and type of fibers and modality
Facial, SVE GSA SVA GVA GVE-P and both
What is CN VIII and type of fibers and modality
acoustic vestibulocochlear, SSA SSE sensory
What is CN IX and type of fibers and modality
glossopharyngeal SVE GSA SVA GVA GVE-P both
What is CN X and type of fibers and modality
vagus, SVE GSA SVA GVA GVE-P both
What is CN XI and type of fibers and modality
spinal accessory, GSE motor
What is CN XII and type of fibers and modality
hypoglossal GSE motor
why is olfactory or CN I Special visceral afferent
because assist body in preparation for eating, reflex salivation and increase gastric motility
why is CN II optic special somatic afferent
afferent fibers of retina, primary receptor for sense of sight
describe why CN III oculomotor is both GSE and GVE-P
general somatic efferent in its motor to extraoccular mm
general visceral efferent-PAN because PAN to intraocular m which change shape of lens for accommodation and pupillary constriction(ciliary ganglion)
describe why CN IV trochlear is GSE
general somatic efferent because inn superior oblique of eye
describe why CN V trigeminal is GSA and SVE
general somatic afferent because major sensory of head inn scalp and face, all conjunctiva, epithelium of nasal cavity, paranasal sinuses, oral cavity, skin of outer ear, external auditory meatus, cranial dura and proprioception to all skel m of head
special visceral efferent to motor skel m of pharyngeal arch origin, mm of mastication, mylohyoid, anteiror belly of digastric, tensor vali palatini and tensor tympani mm
describe why CN VI abducens is GSE
general somatic efferent b/c inn lateral rectus
describe why CN VII facial is SVE, GSA, SVA, GVA, GVE-P
SVE- motor to second pharyngeal arch origin mm of facial expression, stylohyoid, post belly digastric m and stapedius
GSA- sensory to external ear and external auditory meatus
SVA- taste ant 2/3 tongue chorda tympani
GVA- sensory uppermost pharynx
GVE-P- PAN to lacrimal gland, nasal, palatal, oral and pharyngeal mucous glands via greater petrosal n and pterygopalatine ganglion to submandibular and sublingual salivary glands via chorda tympani and submandibular ganglion
describe why CN VIII vestibulocochlear is SSA and SSE
special somatic afferent because organ of corti related to sense of hearing
afferent from semicircular canals, utricle and saccule of internal ear relative to sense of equilibrium
special somatic efferent thru motor related to auditory input
describe why CN IX glossopharyngeal is SVE, GSA, SVA, GVA, GVE-P
special visceral efferent- motor to skel m of pharyngeal arch origin, stylopharyngeus
general somatic afferent- sensory to portion of skin to external ear
special visceral afferent- taste from post 1/3 tongue
general visceral afferent- sensory to epithelium lining pharynx from base of skull to laryngeal adieus, middle ear internal tympanic membrane, tonsils, posterior third of tongue, parotid gland carotid sinus
GVE-P secretory fibers to parotid salivary gland via lesser petrosal nerve and otic ganglion
describe why CN X vagus is SVE, GSA, SVA, GVA and GVE-P
SVE- motor to skel m or pharyngeal arches 4 and 6(superior, middle, inf pharyngeal constrictor, salpingopharyngeus, levator veli palatini, palatoglossus, palatopharyngeus, post lat cricoarytenoid, transverse and oblique arytenoid, thyroarytenoid and upper esophagus
GSA- cutaneous external ear, meatus, surface tympanic membrane and dura of post fossa
SVA- taste from epiglottic surface of tongue
GVA-sensory root of tongue, larynx respiratory system, heart gut tube and distal third transverse colon, capsule liver spleen kidneys and gonads
GVE-P mucous lglands in larynx, sm m in glands of gut tube to distal third transverse colon, cardiac m and respiratory system
describe why CN XI spinal accessory is GSE
motor to SCM and trapezius
describe why CN XII hypoglossal is GSE
motor to styloglossus, genioglossus, hyoglossus, intrinsic mm of tongue (longitudinal, vertical and transverse)
