ABSTRACT
The fundamental structural and functional unit of neuromuscular control (Enoka 1994; Aidley 1998) is the motor unit consisting of a single motor nerve fibre (efferent a-motoneuron) and all the muscle fi bres that are innervated by it. These can be distributed throughout a large portion of the volume of the muscle (Nigg and Herzog 1994). Each muscle is comprised of multiple motor units. The contractile force produced by the whole muscle is partly determined by the number of motor units activated by neural stimulation and by the rate at which stimulation occurs.
