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myotatic reflex

Gabriel Abend
I propose an agenda for empirical research on decision, choice, decision-makers, and decision-making qua social facts. Given society S, group G, or field F, I make a twofold sociological proposal. First, empirically investigate the conditions under which something-call it X-is taken to be a decision or choice, or the outcome of a decision-making process. What must X be like? What doesn't count (besides, presumably, myotatic reflexes and blushing)? Whom or what must X be done by? What can't be a decision-maker (besides, presumably, rocks and apples)? Second, empirically investigate how decision/choice concepts are used in everyday life, politics, business, education, law, technology, and science...
October 25, 2017: British Journal of Sociology
M M Alonso-Montejo, M C Pradillo, E E Moreno-Medinilla, P Navas-Sanchez, J L Martinez-Anton
INTRODUCTION: Guillain-Barre syndrome is the most frequent cause of acute flaccid paralysis in children. AIM: To describe the characteristics of patients diagnosed with acute polyneuropathies and their long-term progress. PATIENTS AND METHODS: We conducted a retrospective descriptive analysis of children under 14 years of age admitted to our hospital between January 2004 and December 2014. Clinical, demographic and neurophysiological variables were collected together with other imaging tests...
June 1, 2017: Revista de Neurologia
Marko Kavcic, Blaz Koritnik, Matevz Krzan, Orjana Velikonja, Tomaz Prelog, Milica Stefanovic, Maruša Debeljak, Janez Jazbec
Patients treated with vincristine predictably develop peripheral neuropathy. The aim of our study was to investigate the pattern of vincristine-induced neuropathy in children by nerve conduction studies and somatosensory-evoked potentials (SSEPs). We included data from 39 children who received vincristine for various pediatric malignancies, and we performed initial and follow-up (after a minimum of 4 doses of vincristine 1.5 mg/m) conduction studies in 27 patients and SSEPs studies in 34 patients. On follow-up the most prevalent symptoms were paresthesias (44%) and constipation (22%), and the most common neurological sign was impaired myotatic reflexes (89%)...
May 2017: Journal of Pediatric Hematology/oncology
Kalyan B Bhattacharyya
The stretch reflex or myotatic reflex refers to the contraction of a muscle in response to its passive stretching by increasing its contractility as long as the stretch is within physiological limits. For ages, it was thought that the stretch reflex was of short latency and it was synonymous with the tendon reflex, subserving the same spinal reflex arc. However, disparities in the status of the two reflexes in certain clinical situations led Marsden and his collaborators to carry out a series of experiments that helped to establish that the two reflexes had different pathways...
January 2017: Annals of Indian Academy of Neurology
Eduardo Alberto Tudury, Marcella Luiz de Figueiredo, Thaiza Helena Tavares Fernandes, Bruno Martins Araújo, Marília de Albuquerque Bonelli, Camila Cardoso Diogo, Amanda Camilo Silva, Cássia Regina Oliveira Santos, Nadyne Lorrayne Farias Cardoso Rocha
Objectives This study aimed to test the extensor carpi radialis and cranial tibial reflexes in cats before and after anesthetic block of the brachial and lumbosacral plexus, respectively, to determine whether they depend on a myotatic reflex arc. Methods Fifty-five cats with a normal neurologic examination that were referred for elective gonadectomy were divided into group 1 (29 cats) for testing the extensor carpi radialis reflex, and group 2 (26 cats) for testing the cranial tibial reflex. In group 1, the extensor carpi radialis reflex was tested after anesthetic induction and 15 mins after brachial plexus block with lidocaine...
February 2017: Journal of Feline Medicine and Surgery
Dong Jo Kim, Junghyun Lee, Jinho Lee, Me-Riong Kim, In-Hyuk Ha
CONTEXT: Many patients with musculoskeletal issues seek traditional Korean medicine or complementary and alternative medicine (CAM) to treat or help deal with their health conditions. Practitioners and patients should be aware of diseases that can exhibit similar symptoms, consequently complicating diagnosis and treatment. OBJECTIVE: The study intended to examine a case of Guillain-Barré syndrome (GBS), in which the patient presented with back pain, leg pain, and weakness that gave cause for diagnostic error at onset...
May 2015: Alternative Therapies in Health and Medicine
Cristiane M Ogata, Marcelo T Navega, Luiz C Abreu, Celso Ferreira, Marco A Cardoso, Rodrigo D Raimundo, Vivian L Ribeiro, Vitor E Valenti
OBJECTIVES: Flexible poles can provide rapid eccentric and concentric muscle contractions. Muscle vibration is associated with a "tonic vibration reflex" that is stimulated by a sequence of rapid muscle stretching, activation of the muscle spindles and stimulation of a response that is similar to the myotatic reflex. Literature studies analyzing the acute cardiovascular responses to different exercises performed with this instrument are lacking. We investigated the acute effects of exercise with flexible poles on the heart period in healthy men...
September 2014: Clinics
Yasuhiro Kagamihara
Spasticity is characterized by abnormal increase in phasic and velocity-dependent response to muscle stretching, such as exaggerated tendon jerks and clonus. Clasp-knife phenomenon is often observed in the affected muscles. Spasticity is caused by either an excess input to the spinal cord or a disordered descending control of the spinal motor system including the myotatic reflex arc. The increased input due to hyperactivity of γ motor neurons has not been demonstrated in human subjects. The hyperactivity of excitatory interneurons and decreased function of the inhibitory system interneurons in the spinal cord as well as the uncoupling of the inhibitory system from the central system are believed to be involved in spasticity; however, the underlying pathology may differ based on the lesion site and the time elapsed since loss of reciprocal inhibition...
September 2014: Brain and Nerve, Shinkei Kenkyū No Shinpo
Shahriar Nafissi, Zahra Vahabi, Maryam Sadeghi Ghahar, Ali Akbar Amirzargar, Soheil Naderi
UNLABELLED: Guillain Barre Syndrome (GBS) is an inflammatory, usually demyelinating, polyneuropathy; clinically characterized by acute onset of symmetric progressive muscle weakness with loss of myotatic reflexes. Thirty five patients with GBS, defined clinically according to the criteria of Asbury and Cornblath, were recruited from three hospital affiliated to Tehran University of Medical Sciences. CONTROLS: As a control group 35 age and sex matched patients with other neurological diseases admitted to the same hospital at the same time, were included in our study...
2013: Acta Medica Iranica
Bruno Vie, Nicolas Gomez, Christelle Brerro-Saby, Jean Paul Weber, Yves Jammes
We searched for the consequences of a maximal static foot inversion sustained until exhaustion on the post-exercise stationary upright standing and the proprioceptive control of the foot muscles. Twelve healthy subjects executed an unilateral maximal static foot inversion during which continuous power spectrum analyses of surface electromyograms of the tibialis anterior (TA), peroneus longus (PL), and gastrocnemius medialis (GM) muscles were performed. Superimposed pulse trains (twitch interpolation) were delivered to the TA muscle to identify "central" or "peripheral" fatigue...
June 21, 2013: Journal of Biomechanics
John B Bodensteiner
Macro creatine kinase type 1 is a complex formed by the creatine kinase isoenzyme BB and monoclonal IgG and occurs in about 1% of patients studied. First identified as a cause of spurious elevation of the total serum creatine kinase in patients suspected of myocardial infarction, the test has been largely replaced by the measurement of troponin levels. We present a child with delayed milestones and persistently elevated total serum creatine kinase measurements (∼ 1000-4000 IU) normal electromyogram and brisk myotatic reflexes...
July 2014: Journal of Child Neurology
Anne D Walling, Gretchen Dickson
Guillain-Barré syndrome consists of a group of neuropathic conditions characterized by progressive weakness and diminished or absent myotatic reflexes. The estimated annual incidence in the United States is 1.65 to 1.79 per 100,000 persons. Guillain-Barré syndrome is believed to result from an aberrant immune response that attacks nerve tissue. This response may be triggered by surgery, immunizations, or infections. The most common form of the disease, acute inflammatory demyelinating polyradiculoneuropathy, presents as progressive motor weakness, usually beginning in the legs and advancing proximally...
February 1, 2013: American Family Physician
Gisele Fabrino Machado, Maria-Gisela Laranjeira, Augusto Schweigert, Guilherme Dias de Melo
BACKGROUND: Seizures are a common problem in small animal neurology and it may be related to underlying diseases. Porencephaly is an extremely rare disorder, and in Veterinary Medicine it affects more often ruminants, with only few reports in dogs. CASE PRESENTATION: A one-year-old intact male Shih-Tzu dog was referred to Veterinary University Hospital with history of abnormal gait and generalized tonic-clonic seizures. Signs included hypermetria, abnormal nystagmus and increased myotatic reflexes...
2012: BMC Veterinary Research
Hugo Gravato Marques, Farhan Imtiaz, Fumiya Iida, Rolf Pfeifer
In mammals, the development of reflexes is often regarded as an innate process. However, recent findings show that fetuses are endowed with favorable conditions for ontogenetic development. In this article, we hypothesize that the circuitry of at least some mammalian reflexes can be self-organized from the sensory and motor interactions brought forth in a musculoskeletal system. We focus mainly on three reflexes: the myotatic reflex, the reciprocal inhibition reflex, and the reverse myotatic reflex. To test our hypothesis, we conducted a set of experiments on a simulated musculoskeletal system using pairs of agonist and antagonist muscles...
February 2013: Biological Cybernetics
E Marteau, P Burdin, J-M Brilhault
Many surgical techniques for the medial patellofemoral ligament have recently been suggested, all of which included problems identifying the femoral anchorage point and determining the proper extent of knee flexion for the transplant. P. Burdin proposed a different and original approach consisting in performing a gracilis muscle transfer to the medial edge of the patella, thus obtaining progressive tension of the transfer during knee flexion by means of the myotatic reflex. We report the results herein. We retrospectively assessed 17 knees treated for patellofemoral instability using this technique...
June 2011: Orthopaedics & Traumatology, Surgery & Research: OTSR
G Goizueta-San Martín, G Ruiz-Rodríguez, G Gutiérrez-Gutiérrez, E Gutiérrez-Rivas, I Millán-Santos
INTRODUCTION: The Hoffmann reflex or H reflex is an electrical counterpart of the myotatic reflex. In normal adults is elicited with stimulating the tibial and the median nerves. It is useful as an adjunct study of neuroexamination and assesses the corresponding arc reflexes in their integrity. SUBJECTS AND METHODS: 248 H reflexes were studied stimulating the tibial nerve in 124 healthy subjects. RESULTS: The latency values were: minimum 23...
November 16, 2010: Revista de Neurologia
C Pérot, I Mora, F Goubel
Neuronal connections between the peroneus longus and the soleus, ago-antagonist bifunctional muscles, were investigated by reflex analysis. The peroneus longus H-reflex, obtained by stimulating the common peroneal nerve, was conditioned by a posterior tibial nerve stimulation. This conditioning stimulus induced an early inhibition of the peroneus longus H-reflex and the degree of inhibition increased with the conditioning stimulus intensity. The soleus H-reflex, solicited by stimulating the posterior tibial nerve, was conditioned by passive adduction movements...
1994: Journal of Electromyography and Kinesiology
Adam A Ginman, Karen L Kline, G Diane Shelton
CASE DESCRIPTION: A 4-year-old domestic shorthair cat was evaluated for a 1-week history of shifting limb lameness that progressed to tetraparesis. CLINICAL FINDINGS: Physical examination revealed generalized muscle atrophy and signs of discomfort when the muscles of the appendicular skeleton were palpated. Neurologic examination revealed diminished myotatic and withdrawal reflexes in all 4 limbs. Results of a CBC indicated mild neutrophilia, and serum biochemical analysis revealed mild hyperalbuminemia and high creatine kinase activity...
July 15, 2009: Journal of the American Veterinary Medical Association
Raegan J Wells, Cassidy D Sedacca, Anna M Aman, Timothy B Hackett, David C Twedt, G Diane Shelton
CASE DESCRIPTION - A 6-year-old castrated male Llewelyn Setter was evaluated because of an acute onset of myalgia and respiratory distress. CLINICAL FINDINGS - Physical examination revealed a stiff stilted gait, swollen muscles that appeared to cause signs of pain, panting, and ptyalism. The dog had a decrease in palpebral reflexes bilaterally and a decrease in myotatic reflexes in all 4 limbs. The panniculus reflex was considered normal, and all other cranial nerve reflexes were intact. Serum biochemical analysis revealed markedly high cardiac troponin-I concentration and creatine kinase and aspartate aminotransferase activities...
April 15, 2009: Journal of the American Veterinary Medical Association
No abstract text is available yet for this article.
1947: Acta Physiologica Scandinavica
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