| spina | arises from two sets of roots (cranial and spinal) that unite to form the accessory nerve trunk |
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| spina | anesthesia of the lower half of the body |
| spina | an anesthetic that is injected into the spine |
| spina | anesthesia of the lower half of the body |
| spina | an anesthetic that is injected into the spine |
| spina | the canal in successive vertebrae through which the spinal cord passes |
| spina | the series of vertebrae forming the axis of the skeleton and protecting the spinal cord |
| spina | a major part of the central nervous system which conducts sensory and motor nerve impulses to and from the brain |
| spina | an abnormal curvature of the vertebral column |
| spina | clear liquid produced in the ventricles of the brain |
| spina | correction of an unstable part of the spine by joining two or more vertebrae |
| spina | any of the 31 pairs of nerves emerging from each side of the spinal cord (each attached to the cord by two roots: ventral and dorsal) |