GENERAL HISTOLOGY

NERVOUS SYSTEM SPECIAL SENSE

SPINALCORD

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The film terminale begins at the conus medullaris and ends at the
A
coccyx.
B
ilium.
C
sacrum.
D
pubic bone.
Explanation: 

Detailed explanation-1: -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-2: -The filum terminale (FT) is a fibrous band that extends from the conus medullaris to the periosteum of the coccyx, and its functions are to fixate, stabilize, and buffer the distal spinal cord from normal and abnormal cephalic and caudal traction.

Detailed explanation-3: -The conus medullaris is the terminal end of the spinal cord, which typically occurs at the L1 vertebral level in the average adult.

Detailed explanation-4: -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.

There is 1 question to complete.