Cranial Nerves: Origin and Insertions

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How are the cranial nerves numbered?
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Terms in this set (46)
How are the cranial nerves numbered?
Anterior to posterior
Name the 3 sensory CN
Olfactory, optic, vestibulocochlear
Name the 5 motor CN
Oculomotor, trochlear, abducens, spinal accessory, hypoglossal
Name the 4 mixed CN
Trigeminal, facial, glossopharyngeal, vagus
Olfactory origin
Temporal lobe cortex
Olfactory insertion
Olfactory bulb (cribiform plate)
Olfactory function
sensory: smell
Optic origin
Thalamus and occipital cortex
Optic insertion
Retina (eye)
Optic function
Sensory: vision
Vestibulocochlear originPons and medullaVestibulocochlear insertionInner earVestibulocochlear functionHearing and balanceOculomotor originPonsOculomotor insertionFour eye musclesOculomotor functionDirects eyeball, raises upper eyelid, autonomic, parasympathetic, controls iris and lens (i.e. constricts pupil)Trochlear originPonsTrochlear insertionSuperior oblique muscle (eye)Trochlear functionControls the "pulley" in the eyeAbducens originPonsAbducens insertionLateral rectus muscle (eye)Abducens functionAbduct eyeball (move it laterally)Spinal accessory originSpinal cordWhat CN is not a true CN and why?Spinal accessory because it originates from spinal cord, not the brainSpinal accessory insertionTrapezius and sternocleidomastoid musclesSpinal accessory functionsomatic motor (of head and neck areas)Hypoglossal originMedulla oblongataHypoglossal insertionTongue musclesHypoglossal functionSomatic motor of tongueTrigeminal originPonsTrigeminal insertionSensory: face, oral and nasal cavities, anterior 2/3 of tongue; Motor: mastication musclesTrigeminal divisionsOpthalmic, Maxillary, MandibularOpthalmic trigeminal functionscalp, upper eyelid, nose, lacrimal glandMaxillary trigeminal functionnasal cavity, palate, upper teethMandibular trigeminal functionlower teeth, anterior tongue (sensory, not taste), chin, mastication muscles (except buccinator)Facial originPonsFacial insertionSensory: anterior 2/3 of tongue; Motor: facial expression muscles; Parasympathetic: lacrimal glands and 2 salivary glandsFacial functionSensory: taste from anterior tongue; Motor: forming facial expressions; ParasympatheticGlossopharyngeal originMedulla oblongataGlossopharyngeal insertionSensory: posterior 1/3 of tongue; Motor: stylopharyngeus; Parasympathetic: parotid salivary glandGlossopharyngeal functionSensory: sensory and taste of posterior tongue; Motor: swallowing; ParasympatheticVagus originMedulla oblogataVagus insertionSensory: pharynx and ear canal and internal organs; Motor: larynx and pharynx muscles (except stylopharyngeus); Parasympathetic: internal organs (heart, lungs)Vagus functionSensory: visceral sensory of most internal organs; Motor: somatic motor of larynx and pharynx; Parasympathetic motorWhat is the only CN that innervates beyond head and neck?Vagus (CN V)Which CN have parasympathetic control?Oculomotor (constricting pupils), Facial (lacrimal and salivary glands), Glossopharyngeal (parotid salivary gland), Vagus (internal organs)