What is the function of mesaxon?

In neurobiology, a mesaxon is a pair of parallel plasma membranes of a Schwann cell. It marks the point of edge-to-edge contact by the Schwann cell encircling the axon.

What is a myelination?

Myelination is the process by which brain oligodendrocytes produce layers of myelin that wrap around the neuronal axons and act as a layer of insulation for the transmission of electric action potentials down the neuronal axon.

What is neurilemma made of?

Composition. Neurilemma: Neurilemma is composed of the plasma membrane of Schwann cells. Myelin Sheath: Myelin sheath is composed of proteins and lipids such as glycolipids, phospholipids, and cholesterol.

What is a Schmidt Lanterman cleft?

Myelin incisures (also known as Schmidt-Lanterman clefts, Schmidt-Lanterman incisures, clefts of Schmidt-Lanterman, segments of Lanterman, medullary segments), are small pockets of cytoplasm left behind during the Schwann cell myelination process.

Do Schwann cells secrete myelin?

Schwann cell, also called neurilemma cell, any of the cells in the peripheral nervous system that produce the myelin sheath around neuronal axons.

What happens with demyelination?

A demyelinating disease is any condition that results in damage to the protective covering (myelin sheath) that surrounds nerve fibers in your brain, optic nerves and spinal cord. When the myelin sheath is damaged, nerve impulses slow or even stop, causing neurological problems.

What is the purpose of neurilemma?

Neurilemma serves a protective function for peripheral nerve fibers. Damaged nerve fibers may regenerate if the cell body is not damaged and the neurilemma remains intact. The neurilemma forms a regeneration tube through which the growing axon re-establishes its original connection.

What is neurilemma called?

Medical Definition of neurilemma : the outer layer surrounding a Schwann cell of a myelinated axon. — called also nerve sheath, Schwann’s sheath, sheath of Schwann.