Clinical uses of H reflexes of upper and lower limb muscles

Clinical Neurophysiology Practice
D Burke

Abstract

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. This can allow conduction across proximal nerve segments and most nerve root segments commonly involved by pathology. Stimulus rate is critical in subjects who are at rest. However the reflex attenuation with higher rates is greatly reduced during a background contraction of the test muscle, with only minor changes in latency if any. In addition the contraction ensures that the reflex response occurs in the desired muscle. Reflex latencies should be corrected for height (or limb length) and age. Because the reflex discharge requires a synchronised volley in group Ia afferents, large increases in reflex latency occur rarely with purely sensory lesions. If the H reflex of soleus, quadriceps femoris or flexor carpi radialis is absent at rest but appears during a voluntary contraction at near-normal latency, there is either low central excitability or a predominantly sensory abnormality. With the former H reflexes will be difficult to elicit throughout the body. If H reflexes can be recorded at rest from muscles for which no reflex can normally be demonstrated, there i...Continue Reading

Citations

Jul 22, 2018·Muscle & Nerve·Mustafa Görkem ÖzyurtKemal S Türker
Apr 4, 2019·American Journal of Medical Genetics. Part a·Tomomi YamaguchiTomoki Kosho
Jan 16, 2020·Journal of Neurology, Neurosurgery, and Psychiatry·Antonino UnciniSatoshi Kuwabara
Mar 19, 2020·Journal of Clinical Medicine·Riccardo BorzuolaAndrea Macaluso
Feb 27, 2020·Medicine and Science in Sports and Exercise·Robert BuhmannAnthony Shield
May 3, 2019·The Journal of Physiology·Alexander KurzStuart N Baker
Sep 10, 2019·Frontiers in Bioengineering and Biotechnology·Martin BehrensVolker R Zschorlich
Jul 11, 2018·Neurotherapeutics : the Journal of the American Society for Experimental NeuroTherapeutics·Amir EftekharJonathan R Wolpaw
Jan 3, 2018·Neuroreport·Mark HoffmanSam Johnson
Jun 23, 2020·Journal of Sleep Research·André D GonçalvesGoncalo V Mendonca
Jun 28, 2019·Experimental Brain Research·Jakob ŠkarabotRade Durbaba
May 9, 2018·The European Journal of Neuroscience·Patrick WiegelChristian Leukel
Sep 25, 2020·Pain Practice : the Official Journal of World Institute of Pain·Simone VigneriGilberto Pari
Dec 2, 2020·Medical Sciences : Open Access Journal·Hamad S Al AmerSharon L Olson
Jan 12, 2021·Experimental Physiology·Loic EspeitThomas Lapole
Dec 17, 2020·Frontiers in Human Neuroscience·Alejandro J LopezMichael R Borich
Mar 24, 2021·Clinical Biomechanics·Nicola A MaffiulettiAlessandro Sartorio
Jun 8, 2021·Clinical Neurophysiology Practice·David Burke, G Michael Halmagyi
Jul 8, 2021·European Journal of Neurology : the Official Journal of the European Federation of Neurological Societies·Andrea RaseraGiovanna Squintani
Sep 9, 2021·Journal of Neurophysiology·Mitsuhiro NitoAkira Naito
Oct 28, 2021·Science Translational Medicine·Marion BadiSilvestro Micera
Sep 17, 2019·Journal of Strength and Conditioning Research·Domingo J Ramos-CampoPedro E Alcaraz

❮ Previous
Next ❯

Related Concepts

Related Feeds

Cardiac Conduction System

The cardiac conduction system is a specialized tract of myocardial cells responsible for maintaining normal cardiac rhythm. Discover the latest research on the cardiac conduction system here.

Amyloid Lateral Sclerosis

Amyotrophic Lateral Sclerosis (ALS) is a progressive nervous system disease associated with the death of neurons that control voluntary muscles. Discover the latest research on ALS here.