Isometric and concentric performance of electrically stimulated ankle plantar flexor muscles in intact rat

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Performance of plantar flexor muscles with eccentric and isometric contractions in intact rats.

PURPOSE To examine the changes in performance of active plantar flexor muscles of rats by controlled dorsiflexion (i.e., stretching of muscles) at two angular velocities. METHODS Repeated stretches (30) at two velocities of ankle rotation [slow stretch (0.87 rads x s(-1) (i.e., 50 degrees x (s-1))), fast stretch (10.47 rad x s(-1) (i.e., 600 degrees x s-1))] were superimposed on maximally act...

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Ankle Plantar-flexor Power in Human Gait

In human gait the majority of mechanical work is generated by the ankle joint. It is commonly thought that concentric contraction of the ankle plantar flexors is the mechanism behind A2 power generation. This study investigated the relationship between the EMG activity of the ankle plantar flexor muscles and A2 power generation. The gait patterns of six healthy adults were recorded. The followi...

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© 2010 The Authors. doi: 10.2340/16501977-0579 Journal Compilation © 2010 Foundation of Rehabilitation Information. ISSN 1650-1977 Objective: To quantify dynamic spasticity, i.e. the coupling between muscle-tendon stretch velocity and muscle activity during gait, of the gastrocnemius and soleus muscles in children with spastic cerebral palsy. Design: Prospective, cross-sectional study. Subjects...

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ژورنال

عنوان ژورنال: Experimental Physiology

سال: 1999

ISSN: 0958-0670

DOI: 10.1017/s0958067099017844