Cranial Nerves Flashcards
Cranial Nerve 1
Olfactory Nerve
Special Sensory (smell)
Cranial Nerve 1Innervation
Superior epithelium of nasal cavity for smell
Multiple small fibers of olfactory bulb, bulb sits in cribriform plate
Cranial Nerve II
Optic nerve
Special sensory (vision)
Cranial Nerve II Innervation
Retina of eyeball for vision
Left & right optic nerves unite at optic chiasm on inferior aspect of the brain
Continue into brain as optic tracts
Cranial Nerve III
Oculomotor nerve
Motor-somatic & parasympathetic
Cranial Nerve III Innervation
Somatic motor to muscles in orbit, parasympathetic innervation to muscles of iris and ciliary muscles controlling lens shape
Parasympathetic ganglion-ciliary ganglion-is associated with this nerve
Cranial Nerve IV
Trochlear nerve
Motor-somatic
Cranial Nerve IV Innervation
Motor to superior oblique muscle in orbit
Small-wraps around back of midbrain and enters into dura
Cranial Nerve V1
Trigeminal nerve-ophthalmic division
Sensory-somatic
Cranial Nerve V1 Innervation
Sensation of orbit, superior nasal cavity, forehead
All branches of CN V provide sensory innervation to dura matter
Cranial Nerve V2
Trigeminal nerve-maxillary division
Sensory-somatic
Cranial Nerve V2 Innervation
Sensation of skin of face over upper jaw, upper teeth, inferior/posterior nasal cavity, palate in oral cavity
Infraorbital foramen
Cranial nerve V3 Innervation
Sensation of skin over lower jaw, side of head, lower teeth, oral cavity, anterior 2/3 of tongue. Motor to muscles of mastication, some palatal/ear muscles.
Passes inferiorly through foramen ovale into infratemporal fossa
Cranial nerve V3
Trigeminal nerve-mandibular division
Sensory-somatic
Motor-somatic
Cranial Nerve VI
Abducens nerve
Motor-somatic
Cranial Nerve VII
Facial nerve
Special sensory-tase from anterior 2/3 of tongue
Motor-somatic & parasympathetic
Cranial Nerve VI Innervation
Motor to lateral rectus muscle in orbit
Cranial Nerve VII Innervation
Sensation of taste to anterior 2/3 of tongue
Somatic motor control to muscles of facial expression, stapedius muscle in ear, posterior digastric and stylohyoid.
Parasympathetic innervation to glands of orbit/nose, submandibular and sublingual salivary glands.
Cranial Nerve VIII
Vestibulocochlear nerve
Special sensory-balance and hearing
Cranial Nerve VIII Innervation
Special sensory innervation to semicircular canals (balance), and cochlea (hearing).
Divides in temporal bone into two divisions, vestibular to semicircular canals and cochlear to cochlea.
Cranial Nerve IX Innervation
Taste and general sensation to posterior 1/3 of tongue, soft palate, and pharynx near tongue, general sensation of tympanic cavity, tympanic membrane, auditory tube.
Somatic motor innervation to stylopharyngeus muscle, parasympathetic innervation to parotid gland, visceral sensory innervation to carotid bifurcation for blood pressure control
Cranial Nerve IX
Glossopharyngeal nerve
Special sensory-taste from posterior 1/3 of tongue
Sensory-somatic and visceral
Motor-somatic and parasympathetic
Cranial Nerve X
Vagus nerve
Special sensory-taste to pharynx
Sensory-somatic and visceral
Motor-somatic and parasympathetic
Cranial Nerve X Innervation
Special sensory innervation of taste to palate/epiglottis, general sensory innervation from epiglottis, larynx
Visceral sensory innervation to GI tract, thorax, abdomen
Somatic motor innervation to pharynx, larynx, palatal muscles. Parasympathetic motor innervation to GI tract, thorax, abdomen
Cranial Nerve XI
Spinal accessory nerve
Motor-somatic
Cranial Nerve XI Innervation
Sternocleidomastoid, trapezius
Cranial Nerve XII
Hypoglossal nerve
Motor-somatic
Cranial Nerve XII Innervation
Intrinsic and extrinsic muscles of tongue (not palatoglossus)
Visible in neck just superior to carotid bifurcation
