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Cranial Nerves

Sources and Destinations of cranial nerves I-XII

Cranial Nerve NumberAfferent SourceMotor destinationParasympathetic destinationNameFunction
IV NA Superior oblique NA Trochlear Eye movement
V Front 2/3 of head, general sensory from anterior 2/3 of tongue masticatory muscles, tensor tympani of middle ear NA Trigeminal Spinal nerve for face, chewing muscles
VI NA Lateral rectus NA Abducens Eye movement
VII External ear, gustatory from anterior 2/3 of tongue facial muscles, stapedius of middle ear submandibular and sublingual salivary glands; lacrimal glands Facial Taste, facial expression
VIII Spiral and vestibular ganglia of inner ear, to cochlear and vestibular nuclei of pons NA NA Vestibulocochlear Vestibular, Auditory
IX External ear, pharynx, sensory and taste from posterior 1/3 of tongue, carotid sinus blood pressure, carotid body CO2-O2 balance Pharyngeal muscles parotid salivary gland Glossopharyngeal Taste, sensory and motor of pharynx
X External ear, taste from epiglottis, thoracic and abdominal viscera, mucous membranes of larynx and pharynx Laryngeal and pharyngeal muscles, thoracic and abdominal viscera Vagus Parasympathetic: breathing, heart rate, respiration, some pharynx and larynx
XI NA Laryngeal muscles, sternocleidomastoid, trapezius NA Accessory Upper back muscles, larynx
XII NA muscles of tongue NA Hypoglossal Tongue muscles
I Olfactory mucosa NA NA Olfactory Smell
II Retina NA NA Optic Vision
III NA Inferior oblique, Medial rectus, Superior rectus, Inferior rectus, levator palpebrae superioris via ciliary ganglion to iris sphincter muscles and lens ciliary muscles Oculomotor Eye movement
Created by: RSussman