Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Intramuscular myoelectric activity and selective coactivation of trunk muscles during lateral flexion with and without load
Autore:
Huang, QM; Andersson, E; Thorstensson, A;
Indirizzi:
Karolinska Inst, Dept Neurosci, Biomech & Motor Control Lab, S-11486 Stockholm, Sweden Karolinska Inst Stockholm Sweden S-11486 Lab, S-11486 Stockholm, Sweden Univ Coll Phys Educ & Sports, Dept Hlth & Sport Sci, Stockholm, Sweden Univ Coll Phys Educ & Sports Stockholm Sweden rt Sci, Stockholm, Sweden
Titolo Testata:
SPINE
fascicolo: 13, volume: 26, anno: 2001,
pagine: 1465 - 1472
SICI:
0362-2436(20010701)26:13<1465:IMAASC>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOW-BACK-PAIN; LUMBAR SPINE; INTRAABDOMINAL PRESSURE; TRAINING EXERCISES; QUADRATUS LUMBORUM; MOTOR CONTROL; WIDE VARIETY; COCONTRACTION; MOMENTS; TASKS;
Keywords:
coactivation; electromyography; lateral flexion; spinal biomechanics; trunk;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Huang, QM Karolinska Inst, Dept Neurosci, Biomech & Motor Control Lab, Box5626, S-11486 Stockholm, Sweden Karolinska Inst Box 5626 Stockholm SwedenS-11486 kholm, Sweden
Citazione:
Q.M. Huang et al., "Intramuscular myoelectric activity and selective coactivation of trunk muscles during lateral flexion with and without load", SPINE, 26(13), 2001, pp. 1465-1472

Abstract

Study Design. Myoelectric activity of trunk muscles was measured intramuscularly in six healthy subjects as they maintained static trunk postures at 0 degrees, 15 degrees, and 30 degrees of lateral bending, unloaded or holding a 20-kg load in one hand alongside the body. Objective. To determine the position and load dependency of the agonistic and antagonistic myoelectric responses of deep and superficial trunk lateral flexor muscles. Summary of Background Data. Loading of the trunk in lateral bending is associated with incidences of low back pain. The neuromotor control of musclessurrounding the spine may be decisive for its vulnerability. Earlier documentation of the activation pattern of trunk muscles, particularly those situated deeply, is incomplete. Methods. Trunk angle was measured between S1-C7 and the vertical with a protractor. Electromyographic activity was recorded unilaterally from eight trunk muscles using intramuscular fine-wire electrodes inserted under the guidance of ultrasound. Results. The electromyographic data showed that all muscles on the side contralateral to the load, except rectus abdominis, had their highest activity while loaded in the position most laterally flexed to the loaded side. The degree of bilateral coactivation was greater for the ventral than for thedorsal muscles. Conclusions. The myoelectric responses of most lumbar trunk muscles to static lateral flexion were dependent on trunk position and loading. The abdominal muscles demonstrated more coactivation than the other trunk muscles, and thus appeared to contribute more to trunk stabilization in laterally bent and loaded trunk positions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/07/20 alle ore 05:01:12