Sensory group Ia proximal conduction velocity.

Abstract:

:The fastest median and ulnar velocities derived by recording motor and mixed nerve action potentials, F waves, H-reflexes, and somatosensory evoked potentials (SEPs) were compared. H-reflex recording was facilitated by employing selective group Ia excitation during voluntary muscular contraction. Mixed nerve, SEP, and H velocities, considered to predominantly reflect group Ia conduction, measured 63.2 +/- 3.2 m/sec, 63.4 +/- 4.5 m/sec, and 67.2 +/- 4.3 m/sec, respectively, between the wrist and elbow. Conventional motor conduction velocity was significantly slower (58.3 +/- 5.1 msec), but F velocity, which although nonuniform is also a measure of motor conduction, was 68.4 m/sec. Mean F latency was considered more reliable and representative than minimum F latency. F and H velocities accelerated proximally by 4.5 m/sec. They complement each other when evaluating motor and sensory group Ia conduction. The H-reflex and SEP use identical stimulus characteristics and when simultaneously recorded allow direct comparison of the fastest conducting peripheral and central sensory pathways.

journal_name

Muscle Nerve

journal_title

Muscle & nerve

authors

Eisen A,Hoirch M,White J,Calne D

doi

10.1002/mus.880070807

subject

Has Abstract

pub_date

1984-10-01 00:00:00

pages

636-41

issue

8

eissn

0148-639X

issn

1097-4598

journal_volume

7

pub_type

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