Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
HUMAN WRIST MOTORS - BIOMECHANICAL DESIGN AND APPLICATION TO TENDON TRANSFERS
Autore:
LOREN GJ; SHOEMAKER SD; BURKHOLDER TJ; JACOBSON MD; FRIDEN J; LIEBER RL;
Indirizzi:
UNIV CALIF SAN DIEGO,SCH MED,DEPT ORTHOPAED,BIOMED SCI GRAD GRP,9500 GILMAN DR LA JOLLA CA 92093 UNIV CALIF SAN DIEGO,SCH MED,DEPT ORTHOPAED,BIOMED SCI GRAD GRP LA JOLLA CA 92093 UNIV CALIF SAN DIEGO,SCH MED,DEPT BIOENGN,BIOMED SCI GRADUATE GRP LA JOLLA CA 92093 VET ADM MED CTR LA JOLLA CA 92093 GOTHENBURG UNIV,DEPT ORTHOPED,DIV HAND SURG GOTHENBURG SWEDEN
Titolo Testata:
Journal of biomechanics
fascicolo: 3, volume: 29, anno: 1996,
pagine: 331 - 342
SICI:
0021-9290(1996)29:3<331:HWM-BD>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
MEDIAL GASTROCNEMIUS-MUSCLE; SPINAL-CORD TRANSECTION; RAT SKELETAL-MUSCLE; CONTRACTILE PROPERTIES; DIFFERENT LENGTHS; HINDLIMB MUSCLES; MOMENT ARM; FIBER; FROG; IMMOBILIZATION;
Keywords:
MOMENT ARM; MUSCLE ARCHITECTURE; SARCOMERE LENGTH; TENDON; WRIST JOINT STRENGTH; TENDON TRANSFER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
58
Recensione:
Indirizzi per estratti:
Citazione:
G.J. Loren et al., "HUMAN WRIST MOTORS - BIOMECHANICAL DESIGN AND APPLICATION TO TENDON TRANSFERS", Journal of biomechanics, 29(3), 1996, pp. 331-342

Abstract

Moment arm, muscle architecture, and tendon compliance in cadaveric human forearms were determined and used to model the wrist torque-jointangle relation (i.e. wrist torque profile). Instantaneous moment armswere calculated by differentiating tendon excursion with respect to joint rotation. Maximum isometric tension of each wrist muscle-tendon unit was predicted based on muscle physiological cross-sectional area. Muscle forces were subsequently adjusted for sarcomere length changes resulting from joint rotation and tendon strain. Torque profiles were then calculated for each prime wrist motor (i.e. muscle-tendon unit operating through the corresponding moment arm). Influences of moment arm, muscle force, and tendon compliance on the torque profile of each motor were quantified. Wrist extensor motor torque varied considerably throughout the range of motion. The contours of the extensor torque profiles were determined primarily by the moment arm-joint angle relations. In contrast, wrist flexor motors produced near-maximal torque overthe entire range of motion. Flexor torque profiles were less influenced by moment arm and more dependent on muscle force variations with wrist rotation and with tendon strain. These data indicate that interactions between the joint, muscle, and tendon yield a unique torque profile for each wrist motor. This information has significant implicationsfor biomechanical modeling and surgical tendon transfer.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 13:31:35