intervertebral foramen

anatomy

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In human nervous system: Structural components of spinal nerves
… through an opening called the intervertebral foramen. The first spinal nerve (C₁) exits the vertebral canal between the skull and the first cervical vertebra; consequently, spinal nerves C₁–C₇ exit above the correspondingly numbered vertebrae. Spinal nerve C₈, however, exits between the 7th cervical and first thoracic vertebrae, so that, beginning…
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