keyword
MENU ▼
Read by QxMD icon Read
search

spinal reflex

keyword
https://www.readbyqxmd.com/read/29140761/limb-segment-load-inhibits-the-recovery-of-soleus-h-reflex-after-segmental-vibration-in-humans
#1
Shih-Chiao Tseng, Richard K Shields
We investigated the effects of vertical vibration and compressive load on soleus H-reflex amplitude and postactivation depression. We hypothesized that, in the presence of a compressive load, limb vibration induces a longer suppression of soleus H-reflex. Eleven healthy adults received vibratory stimulation at a fixed frequency (30 Hz) over two loading conditions (0% and 50% of individual's body weight). H-reflex amplitude was depressed ∼88% in both conditions during vibration. Cyclic application of compression after cessation of the vibration caused a persistent reduction in H-reflex excitability and postactivation depression for > 2...
November 15, 2017: Journal of Motor Behavior
https://www.readbyqxmd.com/read/29133002/clinical-characteristics-of-lumbosacral-spinal-dural-arteriovenous-fistula-davf-comparison-to-thoracic-davf
#2
Toshiki Endo, Takumi Kajitani, Tomoo Inoue, Kenichi Sato, Kuniyasu Niizuma, Hidenori Endo, Yasushi Matsumoto, Teiji Tominaga
OBJECTIVE: Spinal dural arteriovenous fistula (DAVF) occurs at any spinal level but the clinical characteristics of lumbosacral DAVF have not been well documented. Purpose of this study was to evaluate clinical characteristics of lumbosacral DAVF and compare these features to those in thoracic DAVF. METHODS: Twenty-five consecutive patients with 16 thoracic and 9 lumbosacral DAVF were included (mean age, 63.9 years; twenty men). All patients presented with progressive myelopathy...
November 10, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29123886/sudden-cerebral-depression-detected-by-bispectral-index-monitoring-in-cryptococcal-meningitis-with-elevated-near-fatal-cerebrospinal-fluid-pressure
#3
Hironori Matsumoto, Suguru Annen, Kensuke Umakoshi, Jun Takeba, Satoshi Kikuchi, Yuki Nakabayashi, Naoki Moriyama, Muneaki Ohshita, Mayuki Aibiki
Case: An increase in cerebrospinal fluid pressure (CSFP) is usually prominent in cryptococcal meningitis, which has a high mortality rate, so aggressive management to control CSFP is crucial. In this case, a 40-year-old-man survived cryptococcal meningitis treated with continuous spinal drainage under bispectral index (BIS) monitoring. He unexpectedly showed hypertension, went into a coma, and even loss his light reflexes due to CSFP elevation. His BIS values had abruptly dropped before developing these symptoms, but dramatically recovered after lumbar puncture drainage, suggesting that BIS monitoring could reflect cerebral function changes due to CSFP alternations...
July 2017: Acute Medicine & Surgery
https://www.readbyqxmd.com/read/29119209/relationship-between-spasticity-and-spinal-neural-circuits-in-patients-with-chronic-hemiparetic-stroke
#4
Kohei Okuyama, Michiyuki Kawakami, Miho Hiramoto, Kaori Muraoka, Toshiyuki Fujiwara, Meigen Liu
Spasticity is a common problem in patients with stroke that contributes to motor dysfunction. However, the pathophysiological mechanisms underlying spasticity are not fully understood. The purpose of the present study was to explain the relationship between features of spinal neural circuits assessed using electrophysiological techniques and the clinical manifestations of stroke. The participants were 71 patients with chronic hemiparetic stroke. To assess spinal neural circuits, Hmax/Mmax of the forearm flexor muscles and reciprocal inhibition (RI) between forearm extensor and flexor muscles with the H reflex conditioning-test paradigm were measured...
November 8, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29119044/nursing-review-of-diagnosis-and-treatment-of-lumbar-degenerative-spondylolisthesis
#5
Nancy E Epstein, Renee D Hollingsworth
Background: In the lumbar spine, degenerative spondylolisthesis or degenerative (not traumatic) slippage of one vertebral body over another is divided into 4 grades - grade I (25%), grade II (50%), grade III (75%), and grade IV (100%). Dynamic X-rays, magnetic resonance (MR), and computed tomography (CT) scans document the slip secondary to arthritic changes of the facet joint plus stenosis, ossification of the yellow ligament, disc herniations, and synovial cysts. MR best demonstrates soft tissue pathology whereas CT better delineates ossific/calcified disease...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/29118019/acyloxyacyl-hydrolase-modulates-pelvic-pain-severity
#6
Wenbin Yang, Ryan E Yaggie, Mingchen C Jiang, Charles N Rudick, Joseph D Done, Charles J Heckman, John M Rosen, Anthony J Schaeffer, David J Klumpp
Chronic pelvic pain causes significant patient morbidity and is a bane to clinicians. Using a murine neurogenic cystitis model that recapitulates key aspects of interstitial cystitis/bladder pain syndrome (IC), we recently showed that pseudorabies virus (PRV) induces severe pelvic allodynia in BALB/c mice, relative to C57BL/6 mice. Here, we report that a quantitative trait locus (QTL) analysis of PRV-induced allodynia in F2CxB progeny identified a polymorphism on chromosome 13, rs6314295, significantly associated with allodynia (LOD=3...
November 8, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29114923/histamine-modulates-spinal-motoneurons-and-locomotor-circuits
#7
Tamara Coslovich, Michele R Brumley, Giuseppe D'Angelo, Alberto Della Mora, Hillary E Swann, Fulvia Ortolani, Giuliano Taccola
Spinal motoneurons and locomotor networks are regulated by monoamines, among which, the contribution of histamine has yet to be fully addressed. The present study investigates histaminergic regulation of spinal activity, combining intra- and extracellular electrophysiological recordings from neonatal rat spinal cord in vitro preparations. Histamine dose-dependently and reversibly generated motoneuron depolarization and action potential firing. Histamine (20 µM) halved the area of dorsal root reflexes and always depolarized motoneurons...
November 8, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/29107727/severe-spinal-cord-compression-by-a-pure-giant-intradural-schwannoma-of-the-cervical-spine
#8
Javier Quillo-Olvera, Guang-Xun Lin, Jin-Sung Kim
A 73-year-old man with progressive quadriparesis, six months of evolution. Physical examination showed decreased strength at upper and lower limbs together with an increase in osteotendinous reflexes with Babinski sign. Upon radiological investigation, MRI revealed a tumor at C3-T2 with a severe ventrolateral displacement of the spinal cord (Figure 1). The patient underwent surgery for gross total resection of the lesion. Histopathologic findings reported a schwannoma. (Figure 2). Muscular strength of the limbs improved three months after surgery, and the patient was able to walk without assistance...
October 28, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29096221/learned-control-over-spinal-nociception-transfer-and-stability-of-training-success-in-a-long-term-study
#9
Maximilian Bäumler, Moritz Feller, Stefanie Krafft, Manuela Schiffer, Jens Sommer, Andreas Straube, Fabian Weinges, Ruth Ruscheweyh
OBJECTIVE: Healthy subjects can learn to use cognitive-emotional strategies to suppress their spinal nociception, quantified by the nociceptive flexor reflex (RIII reflex), when given visual RIII feedback. This likely reflects learned activation of descending pain inhibition. Here, we investigated if training success persists 4 and 8 months after the end of RIII feedback training, and if transfer (RIII suppression without feedback) is possible. METHODS: 18 and 8 subjects who had successfully completed feedback training were investigated 4 and 8 months later...
October 6, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29096208/changes-in-the-soleus-h-reflex-test-and-correlations-between-its-results-and-dynamic-magnetic-resonance-imaging-abnormalities-in-patients-with-hirayama-disease
#10
Chaojun Zheng, Yu Zhu, Feizhou Lu, Dongqing Zhu, Shuo Yang, Xiaosheng Ma, Xinlei Xia, Robert Weber, Jianyuan Jiang
OBJECTIVE: To investigate changes in soleus H-reflex tests in patients with Hirayama disease (HD) and to analyse correlations between these changes and forward-shifting of the cervical cord during neck flexion. METHODS: The amplitude of the soleus H-reflex with and without vibration on the Achilles tendon was recorded bilaterally in 81 HD patients and 34 controls to measure both the vibratory inhibition index (VII) and the Hmax/Mmax ratio. The maximum forward-shifting degree of cervical cord during neck flexion was measured using dynamic magnetic resonance imaging in all HD patients...
October 3, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29093168/strategies-to-augment-volitional-and-reflex-function-may-improve-locomotor-capacity-following-incomplete-spinal-cord-injury
#11
Kristan A Leech, Hyosub E Kim, Thomas George Hornby
Many studies highlight the remarkable plasticity demonstrated by spinal circuits following an incomplete spinal cord injury (SCI). Such plasticity can contribute to improvements in volitional motor recovery, such as walking function, although similar mechanisms underlying this recovery may also contribute to the manifestation of exaggerated responses to afferent input, or spastic behaviors. Rehabilitation interventions directed towards augmenting spinal excitability have shown some initial success in improving locomotor function...
November 1, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29081477/hydromyelia-in-a-japanese-black-calf
#12
Konosuke Otomaru, Keisuke Ono, Kenta Wataya, Kohei Akioka, Takaaki Ando, Akira Yabuki, Chikara Kubota, Noriaki Miyoshi, Yasuaki Kawasaki
A Japanese Black calf, manifested by clinical signs of inability to stand and extending hind limbs after birth, was investigated clinically and pathologically. In the neurological inspection, gastrocnemius reflex and patellar tendon reflex of the right hind limb were hyperactive, and gastrocnemius reflex and crossed extension reflex of the left hind limb were also hyperactive. Magnetic resonance imaging (MRI) examination showed a cavity in the cord at the area of the third and fourth lumbar vertebrae in T2-weighted imaging...
October 30, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/29079236/effectiveness-of-foot-biomechanical-orthoses-to-relieve-patients-knee-pain-changes-in-neural-strategy-after-9%C3%A2-weeks-of-treatment
#13
Sébastien Moyne-Bressand, Carole Dhieux, Patrick Decherchi, Erick Dousset
Knee pain is one of the most common lower leg complaints. It is often treated with plantar orthoses to provide cushioning and correct locomotion, imbalances of the foot, and postural deficits. However, the published scientific data are poor concerning the mechanisms involved in pain reduction after wearing foot orthoses, and, to the best of our knowledge, no trial has investigated the mid-term effectiveness. The aim of the present study was to evaluate the effectiveness of foot orthoses according to sound biomechanical principles in the treatment of knee pain...
November 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/29070633/central-pattern-generators-in-the-turtle-spinal-cord-selection-among-the-forms-of-motor-behaviors
#14
Paul S G Stein
Neuronal networks in the turtle spinal cord have considerable computational complexity even in the absence of connections with supraspinal structures. These networks contain Central Pattern Generators (CPGs) for each of several behaviors, including three forms of scratch, two forms of swim, and flexion reflex. Each behavior is activated by a specific set of cutaneous or electrical stimuli. The process of selection among behaviors within the spinal cord has multisecond memories of specific motor patterns. Some spinal cord interneurons are partially shared among several CPGs while other interneurons are active during only one type of behavior...
October 25, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29068880/quantitative-magnetization-transfer-mri-measurements-of-the-anterior-spinal-cord-region-are-associated-with-clinical-outcomes-in-cervical-spondylotic-myelopathy
#15
Michael Brendan Cloney, Zachary A Smith, Kenneth A Weber, Todd B Parrish
STUDY DESIGN: case-control. OBJECTIVE: To understand the role of magnetization transfer ratio in identifying patients with clinically significant myelopathy and disability. SUMMARY OF BACKGROUND DATA: Magnetization transfer ratio (MTR) is a quantitative measure that correlates with myelin loss and neural tissue destruction in a variety of neurological diseases. However, the usefulness of MTR in patients with cervical spondylotic myelopathy (CSM) has not been examined...
October 24, 2017: Spine
https://www.readbyqxmd.com/read/29067867/comparison-of-transcutaneous-electrical-nerve-stimulation-tens-and-functional-electrical-stimulation-fes-for-spasticity-in-spinal-cord-injury-a-pilot-randomized-cross-over-trial
#16
Anjali Sivaramakrishnan, John M Solomon, Natarajan Manikandan
OBJECTIVE: Spasticity following spinal cord injury (SCI) can impair function and affect quality of life. This study compared the effects of transcutaneous electrical nerve stimulation (TENS) and functional electrical stimulation (FES) on lower limb spasticity in patients with SCI. DESIGN: Double blind randomized crossover design. SETTING: Neuro-rehabilitation unit, Manipal University, India. PARTICIPANTS: Ten participants (age: 39 ± 13...
October 25, 2017: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/29063170/-neuromodulation-of-lower-urinary-tract-dysfunction
#17
REVIEW
T M Kessler, S de Wachter
Neuromodulative procedures such as transcutaneous electrical nerve stimulation (TENS), transcutaneous/percutaneous tibial nerve stimulation (TTNS/PTNS), and sacral neuromodulation (SNM) are promising second-line treatments for refractory lower urinary tract dysfunction. Using these therapies, both storage and voiding disorders but also bowel dysfunction might be successfully treated. Although the mechanism of action of neuromodulation is not well understood, it seems to involve modulation of spinal cord reflexes and brain networks by peripheral afferents (genital/rectal, tibial and sacral afferents in the case of TENS, TTNS/PTNS, and SNM, respectively)...
October 23, 2017: Der Urologe. Ausg. A
https://www.readbyqxmd.com/read/29060070/effects-of-anode-position-on-the-responses-elicited-by-transcutaneous-spinal-cord-stimulation
#18
Yohei Masugi, Hiroki Obata, Kimitaka Nakazawa
The purpose of this study was to investigate the effect of anode position on the spinal reflex responses evoked by transcutaneous spinal cord stimulation. Healthy males participated in two experiments. In Experiment 1 (Exp. 1, n = 3), we investigated the effect of anode position on the spinal reflex responses in multiple lower-limb muscles. Experiment 2 (Exp. 2, n = 8) focused on the effect of anode position on the spinal reflex response in the vastus medialis (VM) muscle. In each experiment, electromyographic signals were recorded in the right leg muscle(s)...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29055385/is-quadriceps-h-reflex-excitability-a-risk-factor-for-patellofemoral-pain
#19
Marcella Ferraz Pazzinatto, Danilo de Oliveira Silva, Evangelos Pappas, Fernando Henrique Magalhães, Fábio Mícolis de Azevedo
Patellofemoral pain (PFP) is one of the most common conditions in orthopedic practice while recent evidence has suggested that it may be a predisposing factor to patellofemoral osteoarthritis. In addition to biomechanical alterations associated with the pathomechanisms underlying PFP, the investigation of neurophysiological alterations has provided novel information in the understanding of the pathophysiology of PFP. For instance, women with PFP present lower amplitude of the vastus medialis (VM) H-reflexes compared to pain-free controls, which suggests that the excitability of spinal reflexes might be a promising tool for discriminating woman with PFP in clinical practice...
October 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29047318/spontaneous-spinal-epidural-hemorrhage-following-disseminated-intravascular-coagulation-resulting-in-paraplegia-a-case-report
#20
Nazia Dildar, Saeed Bin Ayaz, Muhammad Omer Aamir, Nadeem Ahmad
CONTEXT: Spontaneous spinal epidural hemorrhage (SSEH) mostly presents as low back pain with or without a radiculopathy, and rarely with paraplegia or tetraplegia depending on the site and severity of spinal cord compression. We present here a case who had anemia and developed paraplegia following disseminated intravascular coagulation (DIC) due to a transfusion reaction. FINDINGS: A 65-year-old lady presented with sudden onset chest pain radiating to nape of the neck followed by loss of sensations and power in legs few hours after a blood transfusion...
October 19, 2017: Journal of Spinal Cord Medicine
keyword
keyword
50227
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"