STUDY OBJECTIVES The aim of our study was to determine which muscle or combination of muscles (either axial or limb muscles, lower or upper limb muscles, or proximal or distal limb muscles) provides the highest rates of rapid eye movement (REM) sleep phasic electromyographic (EMG) activity seen in patients with REM sleep behavior disorder (RBD). SETTING Two university hospital sleep disorders...

the prediction of the joint angle position, especially during tremor bursts, can be useful for detecting, tracking, and forecasting tremors. thus, this research proposes a new model for predicting the wrist joint position during rhythmic bursts and inter‑burst intervals. since a tremor is an approximately rhythmic and roughly sinusoidal movement, neural oscillators have been selected to underli...

Recent studies have revealed that the stretch reflex responses of both ankle flexor and extensor muscles are coaugmented in the early stance phase of human walking, suggesting that these coaugmented reflex responses contribute to secure foot stabilization around the heel strike. To test whether the reflex responses mediated by the stretch reflex pathway are actually induced in both the ankle fl...

INTRODUCTION Whether there is a gender difference in fatigue and recovery from maximal velocity fatiguing contractions and across muscles is not understood. METHODS Sixteen men and 19 women performed 90 isotonic contractions at maximal voluntary shortening velocity (maximal velocity concentric contractions, MVCC) with the elbow flexor and knee extensor muscles (separate days) at a load equiva...

Introduction The extensor muscles of the hand showed many variations in shape. Its of peculiar interest for surgeons in the field of tendon repair, transfer or reconstruction. In literature several forms of anatomical variations were described: variations of long muscles, supernumerary tendons and additional muscles [1]. Different classification systems were developed by Kosugi [2], Yoshida [3]...

Ten young men sustained an isometric contraction of the knee extensor muscles at 20% of the maximum voluntary contraction (MVC) torque on three separate occasions in a seated posture. Subjects performed an isometric knee extension contraction on a fourth occasion in a supine posture. The time to task failure for the seated posture was similar across sessions (291 +/- 84 s; P > 0.05), and the MV...

Introduction Previous cross-sectional study demonstrated that spinal kyphosis was signiflcantly associated with back extensor strength. However, the influence of trunk muscle on the development of kyphosis is still unclear due to the paucity of longitudinal study. The purpose of this study was to evaluate the association of back extensor strength and progression of kyphosis with longitudinal fo...

BACKGROUND The literature is inconsistent and inconclusive on the relationship between bone mineral density (BMD) and muscular strength in postmenopausal women. OBJECTIVE To evaluate the relationship between isokinetically and isometrically determined muscle strength and BMD in postmenopausal women of different age groups. METHODS Healthy postmenopausal women (n = 293; mean age, 54.22 ± 3.8...

Introduction lntra-abdominal pressure (IAP) is elevated during many functional tasks and has been argued to increase stability of the spine (Bartelink, 1957; Grillner et al., 1978; Daggfeldt and Thorstensson, 1997). Although several studies have shown a relationship between IAP and spinal stability (e.g. (Cresswell and Thorstensson, 1994; Cholewicki et al., 1999), it has been impossible to dete...

BACKGROUND Although non-specific pain in the upper limb muscles of workers engaged in mild repetitive tasks is a common occupational health problem, much is unknown about the associated structural and biochemical changes. In this study, we compared the muscle energy metabolism of the extrinsic finger extensor musculature in instrumentalists suffering from work-related pain with that of healthy ...