NEET PG DENTAL EXAM

Detailed explanation-1: -A myelin sheath is a sleeve (sheath) that’s wrapped around each nerve cell (neurons). It’s a protective layer of fat (lipids) and protein that coats the main “body” section of a neuron called the axon.

Detailed explanation-2: -The majority of the neurons in the central nervous system and peripheral nervous system have myelinated axons. This is because the most central nervous system and peripheral nervous system neurons require fast signal transmission such as neurons responsible for spinal reflexes.

Detailed explanation-3: -The myelin sheath is a greatly extended and modified plasma membrane wrapped around the nerve axon in a spiral fashion [1]. The myelin membranes originate from and are a part of the Schwann cells in the peripheral nervous system (PNS) and the oligodendroglial cells in the central nervous system (CNS) (see Chap.