Conduction velocities of axons

Conduction velocities of axons - Conduction velocities of...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Conduction velocities of axons: o In general, the larger the axon's diameter, the faster it conducts impulses o Speed of conduction influenced also by drugs (especially those that alter sodium o Saltatory conduction: the presence of the myelin sheath insulates against Ranvier between adjacent Schwann cells (or oligodendrocytes) much faster than in unmyelinated axons. .. the electrical signal jumps from node to node along the axon - Multiple sclerosis (MS): autoimmune disease - immune system attacks myelin called scleroses o results in short-circuiting of current in neurons, although axons are generally not damaged - symptoms may cycle o immune system attack - Group A nerve fibers: somatic sensory & motor fibers; myelinated, large diameter
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/04/2011 for the course ANTHRO 2000 taught by Professor Monicaoyola during the Fall '10 term at Broward College.

Page1 / 2

Conduction velocities of axons - Conduction velocities of...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online