aksonissegmenttejä

Aksonissegmenttejä, also known as axon segments, are the individual sections of an axon, which is a long, slender projection of a neuron that conducts electrical impulses away from the cell body. Each axon segment is separated by nodes of Ranvier, which are gaps in the myelin sheath that surrounds the axon. The myelin sheath is produced by Schwann cells in the peripheral nervous system and oligodendrocytes in the central nervous system. The myelin sheath serves to insulate the axon and increase the speed of impulse conduction. The length of an axon segment can vary depending on the type of neuron and the degree of myelination. In myelinated axons, the segments are typically around 1-2 millimeters long, while in unmyelinated axons, the segments are much shorter. The study of axon segments is important in understanding the structure and function of the nervous system, as well as in the diagnosis and treatment of neurological disorders.