NEET PG DENTAL EXAM

Detailed explanation-1: -Schwann cells make myelin in the peripheral nervous system (PNS: nerves) and oligodendrocytes in the central nervous system (CNS: brain and spinal cord). In the PNS, one Schwann cell forms a single myelin sheath (Figure 1A).

Detailed explanation-2: -Oligodendrocytes. Oligodendrocytes maintain myelin in the central nervous system. Within white matter, interfascicular oligodendrocytes lie in longitudinal arrays, whereas gray matter oligodendrocytes frequently satellite neurons and possibly help regulate the neuronal microenvironment.

Detailed explanation-3: -The central function of oligodendrocytes is to generate myelin, which is an extended membrane from the cell that wraps tightly around axons. Due to this energy consuming process and the associated high metabolic turnover oligodendrocytes are vulnerable to cytotoxic and excitotoxic factors.