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Cranial nerves are:
12 paired nerves composed of cell bodies with fibers that exit from the cranial cavity. Fibers maybe afferent (sensory, to brain), efferent (motor, from brain), or both.
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CN 1 - Olfactory
Afferent (sensory): Smell
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CN 2 - Optic
Afferent (sensory): Retina of eye; sends vision signal to brain
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CN 3 - Oculomotor
Efferent (motor): Most eye motor movements
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CN 4 - Trochlear
Efferent (motor): Moves the eye's superior oblique muscle
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CN 5 - Trigeminal
Afferent (sensory): Sensation of face, three branches: Ophthalmic branch - forehead, eyes, superior nasal cavity; Maxillary branch - Inferior nasal cavity, face, upper teeth, mucosa of superior mouth; Mandibular branch - jaw, lower teeth, mucosa of lower mouth, anterior tongue
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CN 6 - Abducens
Efferent (motor): Moves the eye's lateral rectus muscle; crosses eyes
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CN 7 - Facial
Efferent (motor): Facial muscle expression, cheek, buccinator
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CN 8 - Vestibulocochlear
Afferent (sensory): Hearing
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CN 9 - Glossopharyngeal
Afferent (sensory): Taste, pharynx to posterior tongue. Efferent (motor): Superior pharyngeal muscles
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CN 10 - Vagus
Afferent (sensory): Thoracic and abdominal organs. Efferent (motor): Larynx, middle and inferior pharyngeal muscles
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CN 11 - Accessory
Efferent (motor): Neck muscles, sternocleidomastoid, trapezius; shrug shoulders
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CN 12 - Hypoglossal
Efferent (motor): Tongue movements
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Nerves 3, 4, and 6
Your eyes do tricks
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Five feels the ______
Face
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All five senses are present in the cranial nerves. Name them.
- CN 1 - Smell
- CN 2 - Sight
- CN 5 - Touch
- CN 8 - Hear
- CN 9 - Taste
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Twelve twists the _____
Tongue
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Nine to _____
Wine and dine
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Eleven shrugs your shoulders towards _____
Heaven
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Lucky #7 brings a _____ to my face
Smile
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