Section 7
Distribution of Spinal Nerves
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Version 29
By Boundless
By Boundless
Boundless Anatomy and Physiology
Physiology
by Boundless
5 concepts
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Cervical Plexus
The cervical plexus is the plexus of the ventral rami of the first four cervical spinal nerves.
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Brachial Plexus
The brachial plexus is formed by the four lower cervical spinal nerves and the first thoracic spinal nerve.
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Lumbar Plexus
The lumbar plexus is formed by the subcostal nerve and divisions of the first four lumbar nerves that arise from the middle to lower back.
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Sacral and Coccygeal Plexuses
The sacral plexus is the plexus of the three sacral spinal nerves (S2–S4) that arise from the lower back just above the sacrum.
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Sensory and Motor Tracts
The spinothalamic tract is a somatosensory tract and the corticospinal tract is a motor tract.