Objective: The in ̄uence of muscle vibration (MV) as a strong proprioceptive input on motorcortical excitability was studied in 5 patients with musician's cramp, 5 musician controls and 5 non-musician controls. Methods: The relaxed ̄exor carpi radialis (FCR), involved in the dystonic movement in all patients, was vibrated using low frequency (80 Hz) and low amplitude (0.5 mm). Transcranial magne...

Hand and foot movements are made more reliably when both limbs move in the same direction at the same time (isodirectional) compared with when they are made in opposite directions (anisodirectional). We hypothesized that M1 intracortical facilitation may subserve hand-foot coordination and reveal correlates that explain the preference for hand-foot movements to be performed in an isodirectional...

The observation of a sinusoidal flexion-extension of the wrist was utilized to determine the continuous time course and phase relation between observed movement and its effects on the observer's motor pathways. While observing movements performed by others, the observers' cortical motor areas and spinal circuits were activated, reflecting the specific temporal and muscular pattern of the actual...

PURPOSE This study was conducted to determine the effects of 5 different finger rest positions: opposite arch, standard intraoral, basic extraoral, cross arch, and finger on finger on the muscle activity of 4 forearm muscles (extensor carpi radialis longus, flexor carpi ulnaris, biceps brachii, and pronator teres) during a simulated periodontal scaling experience. METHODS A convenience sample...

Many vibration-exposed workers have been found to suffer from muscle fatigue and decreased grip strength. Therefore in order to quantify and determine safe levels of human exposure to vibration, measurements and analysis of significance vibration factors are necessary. There are three main objectives in this study. The first one is to investigate the characteristics of vibration factors (vibrat...

INTRODUCTION The extensor tenodesis is a direct dynamic tenodesis which is activated by wrist flexion due either to hand weight or flexor carpi radialis. This tenodesis is usually performed to the distal radius, but it is possible to fix EDC (extensor digitorum communis) to the retinaculum extensorum. MATERIAL AND METHODS Biomechanical study concerned 12 anatomical subjects (24 wrists). The b...

1. Torque-step perturbations were applied to flex or extend the wrists of normal human subjects. The electromyographic activity (EMG) of two of the stretched muscles, flexor carpi radialis and extensor carpi radialis, was monitored. 2. Based on functional characteristics and temporal bursting patterns, the EMG responses were partitioned into four distinct temporal intervals : 30-60, 60-120, 120...

UNLABELLED INTRODUCTION We present the case of a patient with extensor carpi ulnaris tendon subluxation who was first treated for distal radioulnar joint sprain. CASE PRESENTATION A 25-year-old Caucasian man was seen at our policlinic one month after he had fallen on his outstretched hand. A diagnosis of extensor carpi ulnaris subluxation was made clinically but we also had the magnetic re...

Background: Enthesopathy of the extensor carpi radialis brevis origin [eECRB] is a common idiopathic, noninflammatorydisease of middle age that is characterized by excess glycosaminoglycan production and frequentlyassociated with radiographic calcification of its origin. The purpose of our study was to assess the relationship ofcalcification of the ECRB and advancing age.<br /...