Gross anatomy of the spinal cord Internal anatomy of the spinal cord and the spinal nerves Posterior view of entire spinal cord and portions of spinal nerves Internal anatomy of the spinal cord: the organization of gray matter and white matter The locations of selected sensory and motor tracts, shown in a transverse section of the spinal cord Organization and connective tissue coverings of a spinal nerve Branches of a typical spinal nerve, shown in transverse section through the thoracic portion of the spinal cord Brachial plexus in anterior view, Distribution of nerves from brachial plexus (Part 1) Brachial plexus in anterior view, Distribution of nerves from brachial plexus (Part 2) Lumbar plexus in anterior view, Origin of lumbar plexus Lumbar plexus in anterior view, Distribution of nerves from the lumbar and sacral plexuses Sacral plexus in anterior view Cervical plexus in anterior view