The effect of handedness on electromyographic activity of human shoulder muscles during movement

Activation amplitude patterns do not change for back muscles but are altered for abdominal muscles between dominant and non-dominant hands during one-handed lifts

“…However, evidence suggests that preferential use of the dominant hand (handedness) may change mechanical and physiological properties of skeletal muscles (McGill et al 1988;Farina et al 2003;Diederichsen et al 2007;Merletti et al 1994;Sung et al 2004;Marras and Davis 1998). Presently, the aVect of handedness on trunk muscle amplitude recruitment strategies during work related tasks has not been fully explored.…”

“…Handedness has been shown to inXuence muscle properties such as cross-sectional area (McGill et al 1988), Wbre type (Farina et al 2003) and neural drive (Diederichsen et al 2007), which in turn aVects muscle fatigue (Merletti et al 1994;Sung et al 2004) and spinal loading variables (Marras and Davis 1998). For example, higher normalized muscle activation and decreased muscular strength have been observed in muscles of the non-dominant hand during motor control tasks (Bagesteiro and Sainburg 2002;Brouwer et al 2001;Diederichsen et al 2007).…”

Dynamic Electromyography Analysis of Shoulder Muscles for One-handed Manual Material Handling

“…In the experimental conditions in the leftward and rightward directions, only internal/external rotation of shoulder muscles mainly occurred, and therefore, lower muscle activity was revealed than other part muscles. Diederichsen et al (2007) reported that muscle activity was lower in the internal rotation than abduction of shoulder muscle in manual material handling, which was 31 Aug, 2015; 34(4):…”

“…In a research of Koleini Mamaghani et al (2009) considering one-handed motion, it was analyzed that significant differences of muscle activity (iEMG) occurred, according to working conditions. Diederichsen et al (2007) analyzed each muscle's activity, according to shoulder joint's abduction and rotation motions. As a result, it was analyzed that used shoulder motions mainly consumed less energy with the ballistic motion of musculoskeletal system.…”

Influence of Gluteus Maximus Inhibition on Upper Trapezius Overactivity in Chronic Mechanical Neck Pain With Radiculopathy

“…Long-term preferential use of muscles of the dominant side of the body may result in changes of muscle fiber composition with a higher prevalence of slow twitch type I fibers. The shift towards slow twitch fibers is associated with changes in motor unit control properties, which results in reduced firing rates of motor units on the dominant side [24]. No significant difference in EMG amplitude between RT and LT sides of upper trapizius in this current study might also attributed to overactivity of upper trapezius and levator scapula at one side can cause contralateral cervical rotation; in order to keep the head level and in a fixed position, the contralateral upper trapezius will become activated, so both upper trapezii will eventually become tight.…”