![]() ![]() As they join, they form the spinal nerves on the sides of the spinal cord. Sensory nerve roots emerge from the back of the spinal cord and the motor nerve roots from the front of the spinal cord. Primary function of the cauda equina is to send and receive messages between the lower limbs and the pelvic organs, which consist of the bladder, the rectum, and the internal genital organs.Has approximately 10 fiber pairs at its base: 3 to 5 lumbar fiber pairs 5 sacral fiber pairs, and 1 coccygeal nerve.Is the name given to the roots of the spinal nerves that extend beyond the termination of the spinal cord at the first lumbar vertebra in the form of a bundle of filaments within the spinal canal resembling a horse's tail. ![]() Its tapering lower end, the conus medullaris, terminates at the level of the 元 vertebra in neonates, and at the level of the L1-2 intervertebral disk in adults. Its upper end is continuous with the medulla, the transition is defined to occur just above the level of exit of the first pair of cervical nerves. It is, in an adult, approximately 45 cm long, cylindrical and slightly flattened anteriorly and posteriorly. The spinal cord is the major conduit and reflex centre between the peripheral nerves and the brain and transmits motor information from the brain to the muscles, tissues and organs, and sensory information from these areas back to the brain.
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