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31 Cards in this Set

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