A series of 100 patients with pain in the leg was studied and the accuracy of electrical studies in the diagnosis of nerve root lesions was investigated before operation. The electrical studies which were performed on all the patients, included recordings of fibrillation potentials, H-reflex and ankle reflex latencies. This diagnosis technique was found to be more accurate than radiculography o...

During voluntary movement sensory feedback from the moving limb may contribute to drive the muscle activity, correct the ongoing movement, and update the central motor commands for future movements. The sensory feedback may be modulated in various ways to ensure that it is optimally adjusted to the requirements of the performed motor task. It has been demonstrated that much of this modulation i...

Seven subjects with normal joints were tested for active and passive position sense of ankle inversion, peroneal reflex reaction time to sudden ankle inversion, and postural stability during single-leg stance. The tests were performed before and after regional block of the ankle and foot with local anaesthetic. Passive position sense, assessed with the muscles relaxed, was greatly impaired by a...

Klass, M., N. Guissard, and J. Duchateau. Limiting mechanisms of force production after repetitive dynamic contractions in human triceps surae. J Appl Physiol 96: 1516–1521, 2004. First published November 7, 2003; 10.1152/japplphysiol.01049.2003.—The influence of repetitive dynamic fatiguing contractions on the neuromuscular characteristics of the human triceps surae was investigated in 10 subj...

Dynamic joint stiffness determines the relation between joint position and torque, and plays a vital role in the control of posture and movement. Dynamic joint stiffness can be quantified during quasi-stationary conditions using disturbance experiments, where small position perturbations are applied to the joint and the torque response is recorded. Dynamic joint stiffness is composed of intrins...

The objectives of this study were to probe the contribution of spinal neuron persistent sodium conductances to reflex hyperexcitability in human chronic spinal cord injury. The intrinsic excitability of spinal neurons provides a novel target for medical intervention. Studies in animal models have shown that persistent inward currents, such as persistent sodium currents, profoundly influence neu...

The influence of repetitive dynamic fatiguing contractions on the neuromuscular characteristics of the human triceps surae was investigated in 10 subjects. The load was 50% of the torque produced during a maximal voluntary contraction, and the exercise ended when the ankle range of motion declined to 50% of control. The maximal torque of the triceps surae and the electromyographic (EMG) activit...

25 The objectives of this study were to probe the contribution of spinal neuron persistent sodium 26 conductances to reflex hyper-excitability in human chronic spinal cord injury. The intrinsic 27 excitability of spinal neurons provides a novel target for medical intervention. Studies in animal 28 models have shown that persistent inward currents, such as persistent sodium currents, 29 profound...