BRAIN
CRANIAL 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 tip of the conus medullaris is found between the L1 and L2 vertebra in the average adult. The conus medullaris is tethered to the coccyx by a fibrous cord called the filum terminale, which stabilizes the distal end of the spinal cord.
Detailed explanation-3: -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.