Persistence of inter-joint coupling during single-joint elbow flexions after shoulder fixation

Experimental Brain Research
Derek B Debicki, Paul L Gribble


Single-joint elbow flexions are associated with muscle activity at the shoulder that opposes interaction torques arising from rotation of the elbow. We have previously shown that this activity is linearly related to elbow muscle torque and is robust in the presence of novel dynamic loads. Here we examined this relationship in the context of shoulder joint fixation. We tested the hypothesis that after mechanically fixing the shoulder the relationship between shoulder muscle activity and elbow muscle torque will be preserved. In contrast, proposals in which energetic variables are optimized predict that shoulder muscle activity should cease. Subjects performed single-joint elbow flexions in a horizontal plane while interacting with the KINARM robotic exoskeleton. After repeated movements with the shoulder joint fixed we observed a slight and gradual decrease in the activity of pectoralis major relative to movements in which the shoulder was free to rotate. However the strength of the coupling between the shoulder and elbow did not change after shoulder fixation. This is consistent with our previous findings and suggests that the nervous system maintains this inter-joint coupling relationship even when activity at the fixed joint ...Continue Reading


Jan 1, 1982·Biological cybernetics·M J Hollerbach, T Flash
Feb 1, 1995·Journal of Neurophysiology·Robert L SainburgC Ghez
Oct 1, 1995·Journal of Neurophysiology·G L AlmeidaG L Gottlieb
Nov 24, 1999·Journal of Neurophysiology·Paul L Gribble, D J Ostry
May 11, 2000·Journal of Neurophysiology·Gail F KoshlandC J Nevoret-Bell
Aug 12, 2000·Journal of Neurophysiology·R A ScheidtF A Mussa-Ivaldi
Jun 20, 2001·Neural Networks : the Official Journal of the International Neural Network Society·Y WadaM Kawato
Jan 25, 2002·Experimental Brain Research·James C Galloway, Gail F Koshland
Jun 28, 2002·Nature·Paul L Gribble, Stephen H Scott
Apr 2, 2004·Journal of Neurophysiology·Derek B Debicki, Paul L Gribble


Mar 10, 2006·Experimental Brain Research·N CothrosPaul L Gribble
May 11, 2010·Experimental Brain Research·Derek B DebickiJon Hore
Apr 23, 2013·Experimental Brain Research·Christoph Schütz, Thomas Schack
Jul 16, 2010·Journal of Neurophysiology·Liana E BrownPaul L Gribble
Dec 17, 2011·PloS One·Liana E BrownNicole Malfait
Feb 20, 2013·Acta Psychologica·Christoph Schütz, Thomas Schack
Sep 4, 2009·Perceptual and Motor Skills·Hiroshi YamasakiHiroshi Nagasaki
Dec 1, 2009·Human Movement Science·Till BockemühlVolker Dürr
Jun 7, 2014·Frontiers in Human Neuroscience·Thomas SchackDirk Koester
Nov 27, 2014·Frontiers in Computational Neuroscience·Thomas Buhrmann, Ezequiel A Di Paolo
Aug 2, 2014·Journal of Neural Engineering·George A TsianosGerald E Loeb
Aug 23, 2018·Journal of Neurophysiology·Frederic Crevecoeur, Isaac Kurtzer
Apr 19, 2013·Journal of Neurophysiology·Tricia L GiboAmy J Bastian
Feb 27, 2020·Journal of Neurophysiology·Rodrigo S MaedaJ Andrew Pruszynski
Mar 12, 2016·Experimental Brain Research·Christoph SchützThomas Schack
Nov 23, 2020·The European Journal of Neuroscience·Rodrigo S MaedaJ Andrew Pruszynski

Related Concepts

Upper Arm
Elbow Joint Structure
Surface Electromyography
Joint Structure of Shoulder Region
Passive Range of Motion Function
Soleus Muscle Structure

Trending Feeds


Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Synthetic Genetic Array Analysis

Synthetic genetic arrays allow the systematic examination of genetic interactions. Here is the latest research focusing on synthetic genetic arrays and their analyses.

Congenital Hyperinsulinism

Congenital hyperinsulinism is caused by genetic mutations resulting in excess insulin secretion from beta cells of the pancreas. Here is the latest research.

Neural Activity: Imaging

Imaging of neural activity in vivo has developed rapidly recently with the advancement of fluorescence microscopy, including new applications using miniaturized microscopes (miniscopes). This feed follows the progress in this growing field.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Epigenetic Memory

Epigenetic memory refers to the heritable genetic changes that are not explained by the DNA sequence. Find the latest research on epigenetic memory here.

Cell Atlas of the Human Eye

Constructing a cell atlas of the human eye will require transcriptomic and histologic analysis over the lifespan. This understanding will aid in the study of development and disease. Find the latest research pertaining to the Cell Atlas of the Human Eye here.

Femoral Neoplasms

Femoral Neoplasms are bone tumors that arise in the femur. Discover the latest research on femoral neoplasms here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

© 2021 Meta ULC. All rights reserved