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Titolo:
In vivo measurement of fascicle length and pennation angle of the human biceps femoris muscle
Autore:
Chleboun, GS; France, AR; Crill, MT; Braddock, HK; Howell, JN;
Indirizzi:
Ohio Univ, Sch Phys Therapy, Convocation Ctr 172, Athens, OH 45701 USA Ohio Univ Athens OH USA 45701 , Convocation Ctr 172, Athens, OH 45701 USA Ohio Univ, Coll Osteopath Med, Athens, OH 45701 USA Ohio Univ Athens OH USA 45701 v, Coll Osteopath Med, Athens, OH 45701 USA
Titolo Testata:
CELLS TISSUES ORGANS
fascicolo: 4, volume: 169, anno: 2001,
pagine: 401 - 409
SICI:
1422-6405(2001)169:4<401:IVMOFL>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN LEG MUSCLES; SARCOMERE-LENGTH; IN-VIVO; MOMENT ARM; KNEE; TENDON; ARCHITECTURE; COMPLEX; RANGE; HIP;
Keywords:
muscle architecture; muscle, human skeletal;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Chleboun, GS Ohio Univ, Sch Phys Therapy, Convocation Ctr 172, Athens, OH 45701 USA Ohio Univ Athens OH USA 45701 Ctr 172, Athens, OH 45701 USA
Citazione:
G.S. Chleboun et al., "In vivo measurement of fascicle length and pennation angle of the human biceps femoris muscle", CELLS T ORG, 169(4), 2001, pp. 401-409

Abstract

The purpose of this investigation was to measure in vivo fascicle length (L-fas) and pennation angle (PA) of the long head of the biceps femoris muscle (BFlh m.) at different hip and knee angles while the muscle was relaxed using ultrasonography (US). Data were collected from 18 healthy females (23.0 +/- 1.8 years). To validate the measurements of the L-fas and PA, the USmeasurements on cadavers (n = 5), embalmed with the hip and knee in anatomical position, were compared to actual fiber lengths and PA from the dissected muscles. US images from volunteer subjects were recorded when the hip joint was positioned at 0 degrees, 45 degrees and 90 degrees of hip flexion,and at each hip position, the knee joint was placed at 0 degrees, 45 degrees and 90 degrees from full extension. The images were digitized to measureL-fas and PA. Results showed no significant differences between US and direct measurements of the L-fas and PA on the cadaver BFIh m. (p > 0.05). L-fas and PA changed significantly between the different hip and knee positions in volunteer subjects (p < 0.05). Changes in the L-fas and PA are more sensitive to changes in hip position with the knee position constant than to changes in knee position with the hip position constant. This difference may be related to the larger muscle moment arm at the hip resulting in greater excursion of the muscle with changing hip position. Based on the changes in L-fas with changing joint positions, BFlh sarcomere length was estimatedto occupy a portion of the ascending limb, the plateau and descending limbof the length-tension relationship over the range of motion studied. US scanning is valid and reliable for measuring L-fas and PA of the BFlh m. An understanding of the dynamic nature of muscle architecture will assist in determining effective and efficient clinical evaluation and rehabilitation techniques. Copyright (C) 2001 S. Karger AG, Basel.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/03/20 alle ore 19:39:48