Three-dimensional topography of the motor endplates of the rat gastrocnemius muscle.

Abstract:

:Spatial distribution of motor endplates affects the shape of the electrical activity recorded from muscle. In order to provide information for realistic models of action potential propagation within muscles, we assembled three-dimensional maps of the motor endplates of the rat medial gastrocnemius (MGM) and lateral gastrocnemius (MGL) muscles. The maps were assembled from histological cross sections stained for acetylcholinesterase activity. Within MGL, the motor endplates formed three columns along its longitudinal axis. Within MGM, the motor endplates were arranged in a leaf-like body that shifted obliquely from proximal to distal. As inferred from the proximo-distal distribution of the cross-sectional projection area, the majority of the motor endplates were concentrated in the middle of MGL and in the distal third of MGM. Regions of maximal motor endplate concentration are considered most suitable for injections of neuroactive substances, such as neuronal tracers. The assembled maps of the gastrocnemius muscles can be used as guides for such injections within the motor endplate zones.

journal_name

Muscle Nerve

journal_title

Muscle & nerve

authors

Prodanov D,Thil MA,Marani E,Delbeke J,Holsheimer J

doi

10.1002/mus.20378

subject

Has Abstract

pub_date

2005-09-01 00:00:00

pages

292-302

issue

3

eissn

0148-639X

issn

1097-4598

journal_volume

32

pub_type

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