axon sheath

Mira otros diccionarios:

• Axon — For other uses, see Axon (disambiguation). Structure of a typical neuron Axon …   Wikipedia

• Axon — A long fiber of a nerve cell (a neuron) that acts somewhat like a fiber optic cable carrying outgoing (efferent) messages. The neuron sends electrical impulses from its cell body through the axon to target cells. Each nerve cell has one axon. An… …   Medical dictionary

• Axon hillock — Hillock redirects here. A hillock is also a small hill. The axon hillock is the anatomical part of a neuron that connects the cell body (the soma) to the axon. It is described as the location where the summation of inhibitory postsynaptic… …   Wikipedia

• sheath — 1. Any enveloping structure, such as the membranous covering of a muscle, nerve, or blood vessel. Any sheathlike structure. SYN: vagina (1). 2. The prepuce of male animals, especially of the horse. 3. A specially designed tu …   Medical dictionary

• axon — n. a nerve fibre: a single process extending from the cell body of a neurone and carrying nerve impulses away from it. An axon may be over a metre in length in certain neurones. In large nerves the axon has a sheath (neurilemma) made of myelin;… …   The new mediacal dictionary

• axon — axonal /ak seuh nl, son l/, adj. /ak son/, n. Cell Biol. the appendage of the neuron that transmits impulses away from the cell body. Also, axone /ak sohn/. See diag. under neuron. [1835 45; < NL < Gk áxon an axle, axis; akin to L axis] * * * ▪… …   Universalium

• Myelin sheath gap — Drawing of a peripheral nerve axon (labeled axis cylinder ), showing a node of Ranvier along with other features …   Wikipedia

• myelinated axon — an axon with a myelin sheath …   Medical dictionary

• naked axon — an axon which has no myelin sheath …   Medical dictionary

• cervix of axon — a constricted part of an axon, before the beginning of the myelin sheath …   Medical dictionary

• myelin sheath — An insulating layer surrounding vertebrate peripheral neurons, that dramatically increases the speed of conduction. It is formed by specialized Schwann cells, that can wrap around neurons up to 50 times. The exposed areas are called nodes of… …   Dictionary of molecular biology