Which of the following type of cell is involved in myelination of the CNS?
Correct Answer: Oligodendrocytes
Description: Oligodendroglial cells are a type of neuroglial cells, they myelinate the nerve fibre of the central nervous system. The formation of a myelin sheath is the result of a process from an oligodendrocyte spiralling around an axon so that the cytoplasm is extruded until the opposite membranes meet, thus forming a multi-layered lipoprotein coat with a node of Ranvier at each end. It has multiple cytoplasmmic processes and myelinate several axons at the same time.Must know: Peripheral nerves are myelinated from the schwann cells. Loss of myelin, known as demyelination, results in disturbance of the ability to transmit a nerve impulse through the demyelinated segment and this has serious consequences for function. Damage to one oligodendrocyte, therefore, can result in loss of myelin from many axons, whereas damage to a Schwann cell only results in loss of myelin from a single axon. Good to know: Tracts in the nervous system get myelinated at about the time they sta to function.
Category:
Anatomy
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now