MICROANATOMY

Detailed explanation-1: -The nodes of ranvier are the gaps between myelin sheath. These gaps (approximately 1m in length) are generated by schwann cells. Electrical impulses transfer from these nodes.

Detailed explanation-2: -The Nodes of Ranvier are the gaps between the myelin insulation of Schwann cells which insulate the axon of neuron. The Node of Ranvier is the 1-2 micrometre gap between the glial cells of the myelin sheath. These glial cells are called Schwann cells, and they help to electrically insulate the neuron.

Detailed explanation-3: -The segment between nodes of Ranvier is termed as the internode, and its outermost part that is in contact with paranodes is referred to as the juxtaparanodal region.

Detailed explanation-4: -The nodes of Ranvier are characterized by short (1um), specialized regions in the axonal membrane that are not insulated by myelin. Although it is bare of myelin at the node, the axon is in direct contact with the microvilli of the Schwann cells in the PNS, or with processes of astrocytes in the CNS (Figure 1).

Detailed explanation-5: -Each gap in the myelin sheath-between internodes-is called the nodes of Ranvier. The nodes of Ranvier are rich in positive sodium ions. As the electrical signal or impulse travels along the axon, it jumps from one node to the next.