Results 51 to 60 of about 15,396 (149)

Increased Ankle Plantar Flexor Stiffness Is Associated With Reduced Mechanical Response to Stretch in Adults With CP

Frontiers in Bioengineering and Biotechnology, 2021
Hyperexcitable stretch reflexes are often not present despite of other signs of spasticity in people with brain lesion. Here we looked for evidence that increased resistance to length change of the plantar flexor muscle-fascicles may contribute to a ...
Jakob Lorentzen, Jakob Lorentzen, Rasmus Feld Frisk, Rasmus Feld Frisk, Jens Bo Nielsen, Jens Bo Nielsen, Lee Barber   +6 more
doaj   +1 more source

Spasticity mechanisms - for the clinician

Frontiers in Neurology, 2010
Spasticity, a classical clinical manifestation of an upper motor neuron lesion, has been traditionally and physiologically defined as a velocity dependent increase in muscle tone caused by the increased excitability of the muscle stretch reflex ...
Ambar eChakravarty, Angshuman eMukherjee
doaj   +1 more source

Flexor carpi radialis H-reflex in different body positions in patients with post-stroke

Frontiers in Neurology, 2022
BackgroundSpinal stretch reflex (SSR) hyperexcitability reflected by the H-reflex has been reported in more strongly affected extremities after stroke.
Jia-Yin Ma, Jia-Jia Wu, Jia-Jia Wu, Mou-Xiong Zheng, Mou-Xiong Zheng, Mou-Xiong Zheng, Xu-Yun Hua, Xu-Yun Hua, Xu-Yun Hua, Chun-Lei Shan, Chun-Lei Shan, Chun-Lei Shan, Jian-Guang Xu, Jian-Guang Xu   +13 more
doaj   +1 more source

New insights into the pathophysiology of post-stroke spasticity

Frontiers in Human Neuroscience, 2015
Spasticity is one of many consequences after stroke. It is characterized by a velocity-dependent increase in resistance during passive stretch, resulting from hyperexcitability of the stretch reflex. The underlying mechanism of the hyperexcitable stretch
Sheng eLi, Gerard eFrancisco
doaj   +1 more source

Changes in joint, muscle, and tendon stiffness following repeated hopping exercise

Physiological Reports, 2019
The purpose of this study was to elucidate the mechanisms of decline in joint stiffness after repeated stretch‐shortening cycle exercises according to changes in both muscle‐tendon properties and neuromuscular activities.
Keitaro Kubo, Toshihiro Ikebukuro
doaj   +1 more source

Standardization of the Jendrassik maneuver in Achilles tendon tap reflex

Clinical Neurophysiology Practice, 2018
Objective: For many decades, the Jendrassik maneuver (JM) has been used as a reinforcement for stretch reflexes, although the underlying mechanism of this reinforcement is still not fully understood. Moreover, the term JM has been used for many different
Lale A. Ertuglu, Ilhan Karacan, Gizem Yilmaz, Kemal S. Türker   +3 more
doaj   +1 more source

Short-term locomotor adaptation to a robotic ankle exoskeleton does not alter soleus Hoffmann reflex amplitude

Journal of NeuroEngineering and Rehabilitation, 2010
Background To improve design of robotic lower limb exoskeletons for gait rehabilitation, it is critical to identify neural mechanisms that govern locomotor adaptation to robotic assistance.
Ferris Daniel P, Lewis Cara L, Kao Pei-Chun   +2 more
doaj   +1 more source

VIBRATORY STIMULATION OF MUSCLES AND STRETCH REFLEX

The Japanese Journal of Physiology, 1970
1. Firing patterns of Ia afferents and motoneuron efferents were recorded while subjecting homonymous de-efferented triceps surae muscle to vibration applied longitudinally to the tendon.2. The amplitude of vibration (ΔL) necessary to elicit the preferred firing rate of each motoneuron was noted over a wide range (20 to 180cps) of vibration frequencies
HOMMA, Saburo, KOBAYASHI, Hideo, WATANABE, Shiroh   +2 more
openaire   +3 more sources

Effect of static stretching duration on modulation of H‐reflex and tendon‐reflex excitability of the soleus muscle in young men

Physiological Reports
Stretching‐induced impairments of muscle performance are attributed to neural adaptations and mechanical changes. Inhibition of muscle spindle sensitivity appears to have long‐lasting effects after stretching.
Akira Saito, Takamasa Mizuno
doaj   +1 more source

Proposal for Hemiplegic Thumb Rehabilitation Device Based on Repetitive Facilitation Exercise

Machines
In this paper, we propose a thumb rehabilitation device based on the concept of Repetitive Facilitation Exercise (RFE) therapy. Our device only uses rapid passive stretching to the extensor muscle to induce a stretch reflex as a facilitative stimulation.
Koutaro Taniguchi, Yuta Tanda, Yong Yu
doaj   +1 more source