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46 Cards in this Set
- Front
- Back
CN I
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olfactory
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CN II
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optic
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CN III
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oculomotor
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CN IV
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trochlear
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CN V
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trigeminal
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CN VI
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abducens
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CN VII
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facial
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CN VIII
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vestibulocochlear
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CN IX
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glossopharyngeal
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CN X
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vagus
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CN XI
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accessory
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CN XII
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hypoglossal
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CN I Olfactory
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smell (sensory)
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CN II Optic
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sight (sensory)
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CN III Oculomotor
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Moves eyeball, eyelid & pupil size (mixed, mostly motor)
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CN IV Trochlear
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Moves eyeball (mixed, mostly motor)
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CN V Trigeminal
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Chewing, sensations in the face, scalp, cornea & teeth (mixed)
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CN VI Abducens
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Moves eyeball (mixed, mostly motor)
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CN VII Facial
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Facial expression, salvation, taste, tearing & blinking (mixed)
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CN VIII Vestibulocochlear
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Hearing & balance
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CN IX Glossopharyngeal
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Swallowing, saliva secretion, taste (mixed)
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CN X Vagus
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Visceral muscle movement & sensations, esp. movement of digestive system. Sensory for reflux regulation of BP.
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CN XI Accessory
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Head movement, shrugging shoulders, swallowing (mixed, mostly motor)
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CN XII Hypoglossal
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Speech & swallowing (mixed, mostly motor)
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Phrenic
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Diaphragm (damage=impaired breathing)
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Axillary
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Muscles of shoulder (damage=crutch palsy)
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Radial
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Posterior arm, forearm, hand, thumbs & first 2 fingers (damage=wrist drop; inability to lift or extend the hand at the wrist)
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Median
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Forearm & some hand muscles (damage=inability to pick up small objects)
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Ulnar
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Wrist & many hand muscles (damage=clawhand; inability to spread apart fingers)
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Intercostal
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Rib cage (damage=impaired breathing)
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Femoral
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Lower abdomen, anterior thigh, medial leg & foot (damage=inability to extend & flex hip)
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Sciatic
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Lower trunk, posterior thigh & leg (damage=inability to extend & flex knee)
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Common peroneal
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Lateral leg & foot (damage=foot drop, inability to dorsiflex foot)
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Tibial
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Posterior leg & foot (damage=shuffling gait caused by inability to invert & dorsiflex foot)
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Sensory cranial nerves
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CN I Offactory
CN II Optic CN VIII Vestibulocochlear |
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Mixed cranial nerves
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CN V Trigeminal,
CN VI Abducens, CN VII Facial, CN IX Glossopharyngeal CN X Vagus |
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Gray matter
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Part of the CNS that is composed of cell bodies and unmyelinated fibers.
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lumbar puncture
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A procedure in which a hollow needle is inserted into the subarachnoid space, between L3 & L4, about the top level of the hip bone.
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spinal cord
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Continuation of the brain stem. Tubelike structure within the spinal cavity, thickness of thumb. About 17 inches long. Starts at foramen magnum of the occipital bone to the level of the first lumbar vertebra (L1), just below the bottom rib.
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afferent neuron
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Nerve impulse carried from the receptor to the spinal cord. Also called a sensory neuron.
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efferent neuron
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In response to nerve impulse, muscles contract & move. Also called a motor neuron.
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reflex arc
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The nerve pathway involved in a reflex.
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integrating center
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The gray matter of the spinal cord contains interneurons that determine the motor response to the sensory output.
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dermatome
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Area of body supplied by a spinal nerve. Each dorsal root of a spinal nerve innervates a particular area of skin.
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mixed nerves
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All spinal nerves contain contain sensory & spinal nerves.
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nerve tracts
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Group of neurons that share a common function within the CNS; may be ascending (sensory) or descending (motor).
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