The quantification in vivo of muscle volume is important, for example, to understand how muscles change with aging, and respond to rehabilitation. Albracht et al. (2008) suggested that muscle volume can be estimated in vivo from the measurement of muscle cross-sectional area and muscle belly length only. The purpose of this study was to evaluate this proposed relationship for determining muscle...

Whether stroke-induced paretic muscle changes vary across different distal and proximal muscles remains unclear. The objective of this study was to compare paretic muscle changes between a relatively proximal muscle (the biceps brachii muscle) and two distal muscles (the first dorsal interosseous muscle and the abductor pollicis brevis muscle) following hemisphere stroke using clustering index ...

Dear editor, After carefully reading the recent paper by Gu et al, 1 a few questions and concerns arose. In the Background it is mentioned that " LI4 is supplied by the median nerve ". 1 No reference is given to support this statement. Also, it is stated that determination of electroacupuncture (EA) intensity " was generally accompanied by mild muscle contraction in the index finger ". 1 Accord...

Motor evoked potentials (MEPs) to magnetic transcranial stimulation (TCS) were recorded from right abductor digiti minimi (ADM) and first dorsal interosseous (FDI) muscles, sharing the same peripheral innervation but engaged in two different motor demands. In seven healthy and trained subjects, the latencies, amplitudes and variability of MEPs were investigated under the following, randomly int...

In ten healthy subjects and in ten patients suffering from Multiple Sclerosis (MS), we investigated the cortical functional changes induced by a standard fatiguing repetitive tapping task. The Cortical Silent Period (CSP), an intracortical, mainly GABAB-mediated inhibitory phenomenon, was recorded by two different hand muscles, one acting as prime mover of the fatiguing index-thumb tapping task...

Torque motor produced stretch of upper limb muscles results in two distinct reflex peaks in the electromyographic activity. Whereas the short-latency reflex (SLR) response is mediated largely by the spinal monosynaptic reflex pathway, the longer-latency reflex (LLR) is suggested to involve a transcortical loop. For the SLRs, patterns of heteronymous monosynaptic Ia connections have been well-st...

25 We employed a surface electromyographic (EMG) signal decomposition technology to study the 26 control properties of numerous simultaneously active motor units. Six healthy human subjects of 27 comparable age (21 ± 0.63 yr) and physical fitness were recruited to perform isometric 28 contractions of the vastus lateralis (VL), first dorsal interosseous (FDI), and tibialis anterior (TA) 29 muscl...

Acute calcific tendinopathy is one of the manifestations of hydroxyapatite crystal deposition disease. While it is more frequent in the shoulder, it has been described in virtually all areas of the body, but rarely in the muscles of the hand. Its etiopathogenesis is not yet fully understood and despite being a fairly frequent condition, it is commonly misdiagnosed. The onset of the disease is u...

We used surface EMG signal decomposition technology to study the control properties of numerous simultaneously active motor units. Six healthy human subjects of comparable age (21 +/- 0.63 yr) and physical fitness were recruited to perform isometric contractions of the vastus lateralis (VL), first dorsal interosseous (FDI), and tibialis anterior (TA) muscles at the 20, 50, 80, and 100% maximum ...