Thursday, May 14, 2020

CRANIAL NERVES TRICKS [MNEMONICS]

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S.No.	Name	Origin	Distribution	Nature	Functions
I	Olfactory	Olfactory lobe or bulb	Olfactory epithelium in nasal cavity	Sensory	Smell
II	Optic	Optic lobe	Retina of eye	Sensory	Sight
III	Oculomotor	Floor of midbrain	Eye, 4 muscles of eyeball	Motor	Movements of eyeball iris, lens, eyelid
IV	Trochlear	Floor of midbrain	Eye, superior oblique muscles of eyeball	Motor	Rotation of eyeball
V	Trigeminal	Pons	Head, face, jaws, teeth	Sensory Motor	Forehead, scalp, upper eyelid, side of nose, teeth Movements of tongue, jaws muscles for chewing
VI	Abducens	Pons	External rectus muscle of eyeball	Motor	Rotation of eyeball
VII	Facial	Pons	Anterior2/3 tongue. Muscles of face, neck & chewing	Sensory Motor	Taste Facial expression, chewing, movement of neck
VIII	Auditory(acoustic/vestibulocochlear)	Pons	Organ of Corti in cochlea Semicircular canals	Sensory	Hearing Eqilibrium
IX	Glossopharyngeal	Side of medulla	Posterior 1/3 tongue, Mucous membrane and muscles of pharynx	Sensory Motor	Taste and touch Movement (swallowing) of pharynx
X	Vagus (pneumogastric)	Side of medulla	Muscles of pharynx, vocal cords, lungs, heart, oesophagus, stomach, intestine	Sensory Motor	Vocal cords, lungs, Respiratory reflexes, peristaltic movements, speech, swallowing, secretion of gastric glands, slow down heart beat
XI	Spinal accessory	Side of medulla	Muscles of palate, larynx, vocal cords, neck, shoulder	Motor	Muscles of pharynx, larynx, neck, shoulder movements
XII	Hypoglossal	Side of medulla	Muscles of tongue, neck	Motor	Movements of tongue

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