24 25 This study investigated age-related differences in dynamic balance control and its connection to 26 reflexes and explosive isometric plantar flexor torque in nineteen males (9 Young aged 20-33; 10 27 Elderly aged 61-72). Dynamic balance was measured during Slow (15cm/s) and Fast (25cm/s) 28 anterior and posterior perturbations. H/M-ratio was measured at 20% of maximal M-wave 29 (H/M20%) 1...

In an effort to simulate the compromised function and atrophy of lower limb muscles experienced by astronauts after spaceflight, 21 men and women age 30-56 yr were subjected to unilateral lower limb unloading for 5 wk. Whereas 10 of these subjects performed unilateral knee extensor resistance exercise (ULRE) two or three times weekly, 11 subjects (UL) refrained from training. The exercise regim...

BACKGROUND Understanding the mechanisms underlying deep tissue pain in the postoperative period is critical to improve therapies. Using the in vitro plantar flexor digitorum brevis muscle-nerve preparation and patch clamp recordings from cultured dorsal root ganglia neurons innervating incised and unincised muscle, the authors investigated responses to various pH changes. METHODS Incision inc...

BACKGROUND AND PURPOSE The exercise guidelines for people with diabetes mellitus and peripheral neuropathy (DM+PN) have recently changed to allow moderate-intensity weight-bearing exercise, but there are few reports in the literature describing appropriate weight-bearing exercise for those with DM+PN. This case report describes a successful and safe progressive exercise program for an individua...

Tarsal Tunnel Syndrome is the term used to designate the compression of the posterior tibial nerve within the tunnel or of one of its terminal branches leaving the tunnel. This syndrome is due to a neurogenic cause and affects the area supplied by the tibial nerve. The tibial nerve has three branches: the medial plantar nerve, the medial lateral nerve, and the medial calcaneus nerve. The osteof...

The hindlimb of theropod dinosaurs changed appreciably in the lineage leading to extant birds, becoming more 'crouched' in association with changes to body shape and gait dynamics. This postural evolution included anatomical changes of the foot and ankle, altering the moment arms and control of the muscles that manipulated the tarsometatarsus and digits, but the timing of these changes is unkno...

Purpose The aim of this study was to examine fatigue in the plantar flexor muscle group after a prolonged running exercise. Methods Eight healthy, habitually active male subjects ran on a motorized treadmill during 2 hours at a speed chosen to promote 70-75% VO 2max. To evaluate fatigue the twitch interpolation technique was employed in the plantar flexor muscle group before and immediately aft...

The purpose of the present study was to examine the possible inhibitory effect of passive plantar flexor muscle stretching on the motoneuron facilitatory system. Achilles tendon vibration (70 Hz) and triceps surae electrical stimulation (20 Hz) were imposed simultaneously in 11 subjects to elicit contraction through reflexive pathways in two experiments. In experiment 1, a vibration-stimulation...

The neuromuscular adaptations in response to muscle stretch training have not been clearly described. In the present study, changes in muscle (at fascicular and whole muscle levels) and tendon mechanics, muscle activity, and spinal motoneuron excitability were examined during standardized plantar flexor stretches after 3 wk of twice daily stretch training (4 × 30 s). No changes were observed in...