PATHOLOGY

Detailed explanation-1: -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-2: -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.

Detailed explanation-3: -In neuroscience and anatomy, nodes of Ranvier (/ˈrɑːnvieɪ/ RAHN-vee-ay), also known as myelin-sheath gaps, occur along a myelinated axon where the axolemma is exposed to the extracellular space.

Detailed explanation-4: -The gap between myelin sheath are called nodes of Ranvier.