GENERAL HISTOLOGY

NERVOUS SYSTEM SPECIAL SENSE

SPINALCORD

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the terminal portion of the spinal cord?
A
Conus Medullaris
B
Epineurium
C
Filum Terminale
D
Denticulate ligaments
Explanation: 

Detailed explanation-1: -The conus medullaris is the terminal end of the spinal cord, which typically occurs at the L1 vertebral level in the average adult. [1] Conus medullaris syndrome (CMS) results when there is compressive damage to the spinal cord from T12-L2.

Detailed explanation-2: -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-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.

Detailed explanation-4: -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-5: -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.

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