MEDICAL
NERVES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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L. 3
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S. 2-3
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T12
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Ll
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L5
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Detailed explanation-1: -In adults, the cord terminates at the level of L1-L2. Thus the cord spans within 20 bony vertebrae. In a child, it terminates at the upper border of L3. Each of these segments innervates a dermatome.
Detailed explanation-2: -L2 is the lowest vertebral segment that contains spinal cord tissue. After that point, nerve roots exit each of the remaining lumbar levels beyond the spinal cord. Injuries below this level (at the L3, L4, and L5 vertebrae) affect the hips and legs and may cause numbness extending to the feet (sciatica).
Detailed explanation-3: -The spinal cord terminates in the lumbar spine. The exact point of termination varies among individuals; most commonly, it terminates at the level of the L1 or L2 vertebrae.