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Full-Text Articles in Medicine and Health Sciences
Transient Visual Responses Reset The Phase Of Low-Frequency Oscillations In The Skeletomotor Periphery., Daniel K Wood, Chao Gu, Brian D Corneil, Paul L Gribble, Melvyn A Goodale
Transient Visual Responses Reset The Phase Of Low-Frequency Oscillations In The Skeletomotor Periphery., Daniel K Wood, Chao Gu, Brian D Corneil, Paul L Gribble, Melvyn A Goodale
Brain and Mind Institute Researchers' Publications
We recorded muscle activity from an upper limb muscle while human subjects reached towards peripheral targets. We tested the hypothesis that the transient visual response sweeps not only through the central nervous system, but also through the peripheral nervous system. Like the transient visual response in the central nervous system, stimulus-locked muscle responses (< 100 ms) were sensitive to stimulus contrast, and were temporally and spatially dissociable from voluntary orienting activity. Also, the arrival of visual responses reduced the variability of muscle activity by resetting the phase of ongoing low-frequency oscillations. This latter finding critically extends the emerging evidence that the feedforward visual sweep reduces neural variability via phase resetting. We conclude that, when sensory information is relevant to a particular effector, detailed information about the sensorimotor transformation, even from the earliest stages, is found in the peripheral nervous system.
The Effects Of Bag Style On Muscle Activity Of The Trapezius, Erector Spinae And Latissimus Dorsi During Walking In Female University Students, R. Hardie, R. Haskew, J. Harris, Gerwyn Hughes
The Effects Of Bag Style On Muscle Activity Of The Trapezius, Erector Spinae And Latissimus Dorsi During Walking In Female University Students, R. Hardie, R. Haskew, J. Harris, Gerwyn Hughes
Kinesiology (Formerly Exercise and Sport Science)
Back pain is common in adolescents which has been associated with carrying a bag. However, there is little research examining the effects of bag style in female adolescents. The aim of the study was to investigate the effects of different bag conditions on muscle activity of the trapezius, erector spinae and latissimus dorsi muscles in female university students during walking. Twelve female university students walked on a treadmill for 5 minutes at 1.1 m/s during five conditions; control, 1 strapped rucksack, 2 strapped rucksack, ipsilateral shoulder strap and contralateral shoulder strap, each containing 10% bodyweight. Electromyography for the trapezius, erector …
Gender Difference In Lower Limb Muscle Activity During Landing And Rapid Change Of Direction, Gerwyn Hughes, N Dally
Gender Difference In Lower Limb Muscle Activity During Landing And Rapid Change Of Direction, Gerwyn Hughes, N Dally
Kinesiology (Formerly Exercise and Sport Science)
Objectives: The purpose of the study was to examine gender differences in lower limb muscle activity during jump landing and rapid change of direction. Equipment and Methods: Surface electromyography (EMG) of the rectus femoris, biceps femoris and gluteus maximus were recorded for 10 male and 10 female basketball, volleyball or netball players performing five repetitions each of two tasks; 1) landing from a maximal height vertical jump and, 2) 45º rapid change of direction on their dominant leg. Independent sample t-tests were conducted to determine sex differences and paired samples t-tests were conducted to determine task differences in peak EMG …