Want to
learn about nerve physiology?
Axonal Polyneuropathy changes in EMG
EMG/NCV section
Learn about the Brain
Learn about nerves
Different Nerve Fibers
which carry sensory impulses.

Some sensory nerves are thicker and conduct
electrical impulses much faster.
The sensory fibers for joint position sense
which help in coordination are much faster.
Those relating touch information are
slightly slower.
While those that cause pain sensation are the slowest
called the C fiber (small fiber). C fiber disease cannot be detected by EMG/NCV.
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Here is some more information on the
different primary afferent axons:
A-alpha nerve fibers carry information related to
proprioception (muscle sense).
A-beta nerve fibers carry information related to touch.
A-delta nerve fibers carry information related to pain and
temperature.
C-nerve fibers carry information related to pain, temperature and
itch. |

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See a example of salutatory conduction shockwave needed.
(opens in a new window).
MUSCLE
INNERVATION (simplified)

A nuclear bag and a nuclear chain fiber showing their
innervation by group Ia and Group II afferent fibers and gamma
motoneurons. (Matthews PBC: Physiol
Rev 44:219-288,
1964)