Contribution of Achilles tendon mechanics to torque steadiness of the intact limb of unilateral lower-limb amputees

Torque steadiness (TS) is the ability to maintain torque around a given target torque level and is representative of functional movement control. In unilateral lower-limb amputees, plantarflexor TS is reduced. The Achilles tendon plays a critical role in the required transfer of torque from muscle to bone to maintain TS. To-date, no study has investigated how Achilles tendon properties are altered in the intact limb of amputees who adopt a hopping or swing-style gait, and how tendon mechanics contribute to plantarflexor TS in this population. Thirty unilateral amputees and fifteen non-amputee controls will perform plantarflexion contractions while the Achilles tendon is recorded on ultrasound. It is hypothesized that tendon stiffness will be higher in amputees with hopping gait, reducing torque fluctuations and increasing TS compared to controls and amputees with swing-style gait. This study will help understand how tendon properties are altered in amputees and contribute to reduced control of movement.

Faculty Supervisor:

Jennifer Jakobi

Student:

Partner:

Université de Valenciennes et du Hainaut-Cambrésis

Discipline:

Life Sciences

Sector:

Health and Related Sciences & Technology

University:

The University of British Columbia - Okanagan

Program: