مقاله Passive muscle mechanical properties of the medial gastrocnemius in young adults with spastic cerebral palsy : تی پی بین

خلاصه مقاله

Individuals with spastic cerebral palsy (SCP) exhibit restricted joint range of motion and increased joint stiffness due to structural alterations of their muscles. Little is known about which muscle–tendon structures are responsible for these alterations. The aim of this study was to compare the passive mechanics of the ankle joint and medial gastrocnemius (MG) muscle in young adults with SCP and typically developed (TD) individuals. Nine ambulant SCP (17±2 years) and ten TD individuals (18±2 years) participated in the study. Physiological cross sectional area was estimated using freehand 3D ultrasound and found to be 37% lower in the SCP group. An isokinetic dynamometer rotated the ankle through its range while joint torque and ultrasound images of the MG muscle fascicles were simultaneously measured. Mean ankle stiffness was found to be 51% higher and mean MG fascicle strain 47% lower in the SCP group. Increased resistance to passive ankle dorsiflexion in SCP appears to be related to the inability of MG muscle fascicles to elongate with increased force.

نویسندگان

Lee Barber [ Musculoskeletal Research Program, Griffith University, Gold Coast Campus, Queensland 4222, Australia ]

Rod Barrett [ Musculoskeletal Research Program, Griffith University, Gold Coast Campus, Queensland 4222, Australia ]

Glen Lichtwark [ School of Human Movement Studies, University of Queensland, Brisbane, Queensland 4072, Australia ]

کلمات کلیدی

Contracture Spasticity Stiffness Fascicle Strain Ultrasound Physiological cross sectional area

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مشاهده مقالات

journal Of Biomechanics

Journal of Biomechanics publishes reports of original and substantial findings using the principles of mechanics to explore biological problems. Analytical and experimental papers may be submitted, and the journal accepts original articles, surveys and perspective articles (usually by Editorial invitation only), book reviews and letters to the Editor. The criteria for acceptance of manuscripts include excellence, novelty, significance, clarity, conciseness and interest to the readership.

حوزه های تحت پوشش : مهندسی مکانیک، علوم فیزیک، علوم ریاضی