The findings of the recently developed technique of Macro EMG in healthy subjects of different ages are described. The characteristics of the Macro motor unit potential which probably reflects the relative size of the whole motor unit are presented together with suggested normal data for the three muscles studied. An increase in size of the Macro motor unit potential was found with age, particu...

Trains of 100 to 200 stimuli result in F discharges from less than one half of motor units of hand muscles. The maximum observed F discharge frequency was 10%. There was no relation between the surface voltage of motor unit potentials and the frequency of F discharge. The motor unit potentials of larger surface voltage were recruited at higher stimulus intensity levels, usually supramaximal for...

In this chapter we refer to the decomposition of the myoelectric (ME) signal as the procedure by which the ME signal is separated into its constituents motor units action potential trains (MUAPTs). This concept is illustrated in Figure 1. The development of a system to accomplish such a decomposition will be beneficial to both researchers interested in understanding motor unit properties and be...

A new electromyographic technique for the study of the motor unit is described. A modified single fibre EMG electrode is used. The electrical activity obtained by the electrode shaft during voluntary muscle contraction is averaged after triggering from a single muscle fibre action potential and the contribution from one motor unit is thus extracted. This "Macro EMG" signal gives information abo...

objectives: cerebral palsy (cp) describes a group of disorders in the development of movement and posture in the developing brain. the main aim of this study was to determine the distribution of motor impairment and associated disorders in a population of children with cp. methods: this study was carried out in 2011 during three months, on 200 cp children. multiple sources of ascertainment were...

Paradigm Shift in Rehabilitation............3 Traditional Philosophy Emerging Philosophy Effective Mobility: What?...........................5 Effective Mobility: Why?...........................5 Outcomes: Traditional Approach...............5 Walking: At What Cost? The Reality of Walking Outcomes:Restricted Locomotion............7 Theories of Motor Development and Motor Learning...................