Motor Units

Muscle force regulation

Mechanisms explaining the regulation of muscle force: motor unit firing rate, recruitment, and external factors Passive and active mechanisms determine the net, muscle force.  The latter is associated with the number of muscle fibers excited, and thus motor units...

read more

EMG and innervation of external anal sphincter

Using high-density surface electromyogram to identify innervation zone in the external, anal sphincter muscle Innervation zones, where end-plates distribute within striated muscles, can be identified with arrays of electrodes.  For this to be possible, electrodes and...

read more

Action potential propagation in space and time

Understanding how action potential propagation in muscle fibres can be assessed from surface EMG This material was prepared with the goal of illustrating how surface EMGs convey information on the propagation of action potentials.  Analogy is made to the wave...

read more