Results 21 to 30 of about 139,667 (256)

Altered regulation of Ia afferent input during voluntary contraction in humans with spinal cord injury

eLife, 2022
Sensory input converging on the spinal cord contributes to the control of movement. Although sensory pathways reorganize following spinal cord injury (SCI), the extent to which sensory input from Ia afferents is regulated during voluntary contraction ...
Bing Chen, Monica A Perez
doaj   +1 more source

Suprasegmental neurophysiological monitoring with H reflex and TcMEP in spinal surgery. Transient loss due to hypotension. A case report

Clinical Neurophysiology Practice, 2016
Objective: H-reflex is a well known neurophysiological test used to evaluate sensory afferent and motor efferent impulses of S1 root. Despite its simplicity and feasibility, it is not used very often in the operating room.
Ángel Saponaro-González, Pedro Javier Pérez-Lorensu, Estefanía Rivas-Navas, Isabel Fernández-Conejero   +3 more
doaj   +1 more source

RELATIONSHIP BETWEEN REACTION TIME AND AMPLITUDE CHANGES OF THE H-REFLEX IN THE PERFORMANCE OF SIMPLE MOTOR TASK IN PATIENTS WITH THYROTOXICOSIS [PDF]

Journal of IMAB, 2013
The authors examine the dependence between reaction time as an indicator of change at cerebral level and H-reflex amplitude change being a relative index of excitability level in the spinal cord during the preparation of a simple voluntary movement in ...
Miroslav Marinov, Iglika Marinova, Kosta Mirchev, Borislav Boychev, Christiana Romanova, Nina Radeva, Radko Zl. Radev   +6 more
doaj   +1 more source

Recruitment curve of the soleus H-reflex in chronic back pain and lumbosacral radiculopathy

BMC Musculoskeletal Disorders, 2001
Background Needle EMG may be negative in mild or predominantly sensory lumbosacral radiculopathies. In such cases, an increase in the latency of the soleus H-reflex is a useful diagnostic criterion for establishing sensory fiber compromise at the S1 root
Muzii Vitaliano, Mariottini Aldo, Scarfò Giovanni, Mazzocchio Riccardo, Palma Lucio   +4 more
doaj   +1 more source

Utility of the H‐reflex in diagnosing polyneuropathy

Muscle & Nerve, 2019
AbstractIntroductionAn absent Hoffman (H)‐reflex, the electrophysiological equivalent of the Achilles reflex, is assumed to be one of the first detectable signs of polyneuropathy (PNP). In this study we compare the H‐ and Achilles reflexes in patients with suspected PNP to evaluate the diagnostic utility of the H‐reflex.MethodsData from clinical ...
Oda H. Teigland, Kirsten Pugdahl, Anders Fuglsang‐Frederiksen, Hatice Tankisi   +3 more
openaire   +3 more sources

Rate-Dependent Depression of the Hoffmann Reflex: Practical Applications in Painful Diabetic Neuropathy [PDF]

Diabetes & Metabolism Journal
Measurement of the rate-dependent depression (RDD) of the Hoffmann (H) reflex, a technique developed over half a century ago, is founded on repeated stimulation of the H-reflex with tracking of sequentially evoked H-wave amplitudes in the resulting ...
Lu Han, Nigel A. Calcutt, Xiajun Zhou
doaj   +1 more source

Pathways and pitfalls: a qualitative study of student experiences in biomedical science education

FEBS Open Bio, EarlyView.
Biomedical science students from underrepresented backgrounds face barriers including financial strain, disrupted laboratory access and cultural exclusion. Peer networks provide vital support when institutional systems are difficult to navigate. To create inclusive learning environments and achieve academic success, educators should blend active, hands‐
Olivia J. Russell, Cassy Ross, Panagiota S. Filippou, Bruno Silvester Lopes, Dominic Gilchrist, Paul Dean, Kamar Ameen‐Ali, Tora K. Smulders‐Srinivasan, Ahmad A. Khundakar   +8 more
wiley   +1 more source

Neural mechanisms influencing interlimb coordination during locomotion in humans: presynaptic modulation of forearm H-reflexes during leg cycling. [PDF]

PLoS ONE, 2013
Presynaptic inhibition of transmission between Ia afferent terminals and alpha motoneurons (Ia PSI) is a major control mechanism associated with soleus H-reflex modulation during human locomotion. Rhythmic arm cycling suppresses soleus H-reflex amplitude
Tsuyoshi Nakajima, Rinaldo A Mezzarane, Taryn Klarner, Trevor S Barss, Sandra R Hundza, Tomoyoshi Komiyama, E Paul Zehr   +6 more
doaj   +1 more source

Developmental and Epileptic Encephalopathy due to Biallelic Pathogenic Variants in PIGM

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective PIGM encodes a critical enzyme in the glycosylphosphatidylinositol (GPI)‐anchor biosynthesis pathway. While promoter‐region mutations in PIGM have been associated with a relatively mild phenotype characterized by portal vein thrombosis and absence seizures, recent evidence suggests that coding‐region mutations result in a more severe
Júlia Sala‐Coromina, Anna Marcé‐Grau, Barbara Masotto, Marta Codina, Lamia BenJemaa, Yasmina Elaribi, Mónica Martinez‐Gallo, Roger Colobran, Angel Sanchez‐Montañez, Irene Valenzuela, Yoshiko Murakami, Alfons Macaya   +11 more
wiley   +1 more source

Clinical uses of H reflexes of upper and lower limb muscles

Clinical Neurophysiology Practice, 2016
H reflexes can be recorded from virtually all muscles that have muscle spindles, but reflex reinforcement may be required for the reflex response to be demonstrable.
David Burke
doaj   +1 more source