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The thoracic spinal nerve 12 (T12) is a spinal nerve of the thoracic segment. [1] It originates from the spinal column from below the thoracic vertebra 12 (T12). It may also be known as the subcostal nerve.
A spinal cord injury ... A dermatome is an area of the skin that sends sensory messages to a specific spinal nerve ... Injuries from T9 to T12 result in partial loss ...
The nerve roots from L4–S4 join in the sacral plexus which affects the sciatic nerve, which travels caudally (toward the feet). Compression, trauma or other damage to this region of the spinal canal can result in cauda equina syndrome. [citation needed] The symptoms may also appear as a temporary side-effect of a sacral extra-dural injection. [9]
Spinal nerve Typical spinal nerve location. Each spinal nerve is a mixed nerve, formed from the combination of nerve root fibers from its dorsal and ventral roots. The dorsal root is the afferent sensory root and carries sensory information to the brain. The ventral root is the efferent motor root and carries motor information from the brain.
However, the nerve damage results in disruption to the nerve signals and therefore there is an inability to relax the anal sphincters and defecate, often leading to constipation. [5] An upper motor neuron lesion is one that is above the conus medullaris of the spinal cord and therefore above vertebral level T12. [13]
Brown-Séquard syndrome (also known as Brown-Séquard's hemiplegia, Brown-Séquard's paralysis, hemiparaplegic syndrome, hemiplegia et hemiparaplegia spinalis, or spinal hemiparaplegia) is caused by damage to one half of the spinal cord, i.e. hemisection of the spinal cord resulting in paralysis and loss of proprioception on the same (or ipsilateral) side as the injury or lesion, and loss of ...
Between each pair of vertebrae, spinal nerves branch off of the spinal cord and carry information to and from specific parts of the body. [32] The location of injury to the spinal cord maps to the body, and the area of skin innervated by a specific spinal nerve is called a dermatome. All dermatomes below the level of injury to the spinal cord ...
The subcostal nerve (anterior division of the twelfth thoracic nerve [1]) is a mixed motor and sensory nerve contributing to the lumbar plexus. It runs along the lower border of the twelfth rib , often gives a communicating branch to the first lumbar nerve , and passes under the lateral lumbocostal arch .
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