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31 Cards in this Set
- Front
- Back
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What are the anatomical components of the PNS?
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Cranial and spinal nerves.
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What are the functional subdivisions of the PNS?
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Somatic and autonomic.
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What is the function of the PNS?
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Connects the peripheral parts of the body with the central nervous system.
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What does the ventral root contain?
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Efferent (motor) neurons.
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What does the dorsal root contain?
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Afferent (sensory) neurons.
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What is the function of the Dorsal primary ramus?
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Supplies the muscles and skin of the back.
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What is the function of the ventral primary ramus?
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Supllies the muscles and skin of the extremities and the lateral and anterior trunk.
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What does the ventral primary rami form?
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It forms plexuses, except in those arising from the T2 through T12.
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What nerves make up the cervical plexus?
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C1, C2, C3, and C4.
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What does the cervical plexus supply?
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It supplies the neck, superior shoulders, chest and diaphram.
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What nerves make up the brachial plexus?
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C5, C6, C7, C8, and T1.
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What does the brachial plexus supply?
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It supplies the upper extremities.
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What is Erb-Duchenne Palsy?
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Result of injury to the superior roots of the brachial plexus.
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What nerves make up the lumbar plexus?
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L1, L2, L3, and L4.
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What does the lumbar plexus supply?
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Suppliees the pelvis and superior portion of the lower extremities.
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What is the result of femoral nerve injury?
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Results in inability to extend the leg and loss of sensation on the anteromedial aspect of the thigh.
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What nerves make up the sacral plexus?
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L4, L5, S1, S2, S3, and S4.
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What does the sacral plexus supply?
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Supplies the lower extremities.
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What causes Peroneal nerve injury?
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Fractures of the fibula or pressure from casts or splints.
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What is the result of peroneal nerve injury?
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Results in plantarflexion of the foot (foot drop).
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What course does the ventral primary rami follow?
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They follow the rib of the same level around the trunk and innervate that region.
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What is the name of the nerves exiting the plexus?
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Peripheral nerves.
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Which spinal nerve does not have a representative skin area?
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C1
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What do dermatones resemble?
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The resemble stripes along the body.
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What is the result of a lesion of a spinal nerve?
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Results in impaired sensory at its dermatome.
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What do nerve fields resemble?
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They resemble patches along the body.
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What is the result of a lesion of a peripheral nerve?
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Results in impaired sensory at its nerve field.
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How many pairs of cranial nerves are there?
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12 pairs.
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Where do cranial nerves originate?
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Cerebrum and brainstem.
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Where do cranial nerves extend to?
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Mainly to the head and neck regions.
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What are the function of cranial nerves?
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They can be sensory only, motor only, or both sensory and motor.
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