MEDICAL
NERVES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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L 1/ L 2
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L 3/ L 4
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L 5/ L 6
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None of the above
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Detailed explanation-1: -On average, the conus terminates at the middle third of the L1 vertebra but can be located as high as the middle third of the T11 vertebra or as low as the middle third of L3 vertebra. On cross-section, the left and right halves are found to be separated by the ventral median fissure and posterior median sulcus.
Detailed explanation-2: -The conus medullaris most commonly terminates at the L1/2 intervertebral disc level in children and adults 1-3. Extending from the conus is a delicate strand of fibrous tissue called the filum terminale that acts to give longitudinal support to the cord.
Detailed explanation-3: -The conus medullaris, the termination of the spinal cord, is located anywhere between T12 and lower L2. The conus is the last segment of the cord from which nerve roots arise; none arise from the filum.
Detailed explanation-4: -The spinal cord begins at the bottom of the brain stem (at the area called the medulla oblongata) and ends in the lower back, as it tapers to form a cone called the conus medullaris.