PhysiologyIntroduction to Central Nervous System1a7dcd2d
Myelin sheath is absent in:-
A
Pre-axon
B
Axons of CNS
C
Optic nerve.
D
Motor roots.
High-Yield Explanation
Myelin sheath is absent at following sites:- 1) Nodes of Ranvier 2) Proximal pa of Axon (Pre axon) 3) Near the termination of Axon. 4) At the clefts of Schmidt- Lantermann.