نتایج جستجو برای: muscle contractions

تعداد نتایج: 342962  

Journal: :Journal of sports science & medicine 2008
Tomohiro Yasuda William F Brechue Taku Fujita Yoshiaki Sato Takashi Abe

The purpose was to investigate muscle activation during low- intensity muscle contractions with various levels of external limb compression to reduce muscle perfusion/outflow. A series of unilateral elbow flexion muscle contractions (30 repetitive contractions followed by 3 sets x 15 contractions) was performed at 20% of 1RM with varying levels of external compression (0 (without compression), ...

Journal: :Journal of applied physiology 2003
N P Whitehead D L Morgan J E Gregory U Proske

This is a report of experiments carried out on the medial gastrocnemius muscle of the anesthetized cat, investigating the effects of eccentric contractions carried out at different muscle lengths on the passive and active length-tension relationships. In one series of experiments, the motor supply to the muscle was divided into three approximately equal parts; in the other, whole muscles were u...

2012
Carel Bron Jan D. Dommerholt

Myofascial pain syndrome (MPS) is described as the sensory, motor, and autonomic symptoms caused by myofascial trigger points (TrPs). Knowing the potential causes of TrPs is important to prevent their development and recurrence, but also to inactivate and eliminate existing TrPs. There is general agreement that muscle overuse or direct trauma to the muscle can lead to the development of TrPs. M...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 1990
M D Whim P E Lloyd

Intrinsic buccal muscle 5 (I5) in Aplysia is innervated by 2 motor neurons (termed B15 and B16). In addition to the classical transmitter ACh, B15 also contains the 2 neuropeptides SCPA and SCPB. In a previous study, we demonstrated that the SCPs were released from the terminals of B15 in the I5 muscle and that this release was sufficient to raise cAMP levels in I5 muscle fibers. Significant pe...

Journal: :Journal of neurophysiology 2003
Daichi Nozaki Noritaka Kawashima Yu Aramaki Masami Akai Kimitaka Nakazawa Yasoichi Nakajima Hideo Yano

It is well known that muscle contraction can be easily evoked in the human soleus muscle by applying single-pulse electrical stimulation to the tibial nerve at the popliteal fossa. We herein reveal the unexpected phenomenon of muscle contractions that can be observed when train stimulation is used instead. We found, in 11 human subjects, that transient electrical train stimulation (1-ms pulses,...

1999
HENRY P. PARKMAN ANTHONY P. PAGANO Anthony P. Pagano

Parkman, Henry P., Anthony P. Pagano, and James P. Ryan. Subtypes of muscarinic receptors regulating gallbladder cholinergic contractions. Am. J. Physiol. 276 (Gastrointest. Liver Physiol. 39): G1243–G1250, 1999.—The aim of this study was to determine the functional role of muscarinic receptor subtypes regulating gallbladder cholinergic contractions. Electrical field stimulation (EFS; 16 Hz) pr...

Journal: :Journal of applied physiology 2014
Kazushige Sasaki Sho Toyama Naokata Ishii

Recently, an ultrasound-based elastography technique has been used to measure stiffness (shear modulus) of an active human muscle along the axis of contraction. Using this technique, we explored 1) whether muscle shear modulus, like muscle force, is length dependent; and 2) whether the length dependence of muscle shear modulus is consistent between electrically elicited and voluntary contractio...

2017
Keitaro Kubo Tomonobu Ishigaki Toshihiro Ikebukuro

The purpose of this study was to compare the effects of plyometric and isometric training on tendon properties during ramp and ballistic contractions and muscle stiffness under passive and active conditions. Eleven subjects completed 12 weeks (3 days/week) of a unilateral training program for the plantar flexors. They performed plyometric training on one side (PLY) and isometric training on the...

Journal: :American journal of physiology. Gastrointestinal and liver physiology 2011
P G Dinning J W Arkwright M Costa L Wiklendt G Hennig S J H Brookes N J Spencer

Intraluminal manometry is a tool commonly used to record motility in the human digestive tract. The recorded signal results from a combination of factors, including the hydrodynamic pressure transmitted through the intestinal contents due to contraction of the gut wall and the force of the gut wall acting on the sensors in regions of a luminal occlusion. However, the actual relationships betwee...

Journal: :Journal of applied physiology 2002
Francis X Pizza Timothy J Koh Stephen J McGregor Susan V Brooks

We tested the hypotheses that lengthening contractions, isometric contractions, and passive stretches increase muscle inflammatory cells (neutrophils and macrophages) and that prior conditioning with lengthening contractions, isometric contractions, or passive stretches reduces neutrophils and macrophages after subsequent lengthening contractions. Extensor digitorum longus muscles in anesthetiz...

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