medullary sheath

This medullary sheath is interrupted at intervals by the nodes of Ranvier.

The myelin sheath together with the neurilemma is also known as the medullary sheath.

Its fibers acquire their medullary sheaths early, but their connections have not been definitively determined.

The neurolemma is underlain by the basal lamina (referred to as the medullary sheath in the included illustrations).

As the nerve fibers pass through the lamina cribrosa sclerae they lose their medullary sheaths and are continued onward through the choroid and retina as simple axis-cylinders.

One or more nerve fibres perforate the side of the capsule and lose their medullary sheaths; the axis-cylinders subdivide and end between the tendon fibers in irregular disks or varicosities (see figure).

The nerve fibrils after losing their medullary sheaths enter the taste bud, and end in fine extremities between the gustatory cells; other nerve fibrils ramify between the supporting cells and terminate in fine extremities; these, however, are believed to be nerves of ordinary sensation and not gustatory.