Table 2.4 Conditions, techniques and outcomes associated with surface EMG recordings

Voluntary contraction

• Static (root mean square or average rectified value)

• Dynamic (root mean square or average rectified value)

Evoked contraction

• Mechanically

– Stretch (stretch reflex)*

– Tendon percussion (T reflex)*

• Electrically or magnetically

– Motor cortex (motor-evoked potential)*

– Motor nerve

– Maximal (M wave)*

– Submaximal (H refex)*

Note

*The amplitude of these potentials should be normalised to the amplitude of the maximal M wave obtained

in the same conditions.