Choose the incorrect statement from the following.

Schwann cells do interact with unmyelinated nerve fibres by enveloping and supporting groups of these fibers, although the arrangement is less complex than the myelin sheath wrapping seen in myelinated fibres.

Schwann cells are most commonly associated with myelinated nerve fibers (where they wrap around the axon to form the myelin sheath), but they also interact with unmyelinated fibers. Instead of forming a full myelin sheath around each unmyelinated fibre, Schwann cells envelop groups of these fibers, holding them together and providing some level of insulation. This arrangement enhances the conduction of signals along unmyelinated fibers to some extent, as Schwann cells help maintain the appropriate ionic environment around the fibers, allowing electrical impulses to propagate more efficiently. However, the conduction speed along unmyelinated fibers is still slower compared to myelinated fibers due to the absence of the myelin sheath.