Force perception at the shoulder after a unilateral suprascapular nerve block

David Phillips, Peter Kosek, Andrew Karduna

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

There are two key sources of information that can be used to match forces—the centrally generated sense of effort and afferent signals from mechanical receptors located in peripheral tissues. There is currently no consensus on which source of information is more important for matching forces. The corollary discharge hypothesis argues that subjects match forces using the centrally generated sense of effort. The purpose of this study was to investigate force matching at the shoulder before and after a suprascapular nerve block. The nerve block creates a sensory and muscle force mismatch between sides when matching loads. The torque matching accuracy did not change after the nerve block was administered. Directionally, the torque error was in the direction proposed by the corollary discharge hypothesis. However, the mismatch between deltoid EMG was substantially greater compared to the changes in the torque matching error after the block. The results support that sensory information is used during force matching tasks. However, since the nerve block also created a sensory disruption between sides, it is not clear how sensory information is reweighted following the nerve block and a role for sense of effort is still implicated.

Original languageEnglish
JournalExperimental Brain Research
DOIs
StatePublished - 1 Jan 2019

Fingerprint

Nerve Block
Torque
Advisory Committees
Consensus
Muscles

Keywords

  • Deltoid
  • EMG
  • Force perception
  • Isometric ramp contraction
  • Suprascapular nerve
  • Supraspinatus

Cite this

@article{6d3201b22cc4449aa5a49ad6850a6d98,
title = "Force perception at the shoulder after a unilateral suprascapular nerve block",
abstract = "There are two key sources of information that can be used to match forces—the centrally generated sense of effort and afferent signals from mechanical receptors located in peripheral tissues. There is currently no consensus on which source of information is more important for matching forces. The corollary discharge hypothesis argues that subjects match forces using the centrally generated sense of effort. The purpose of this study was to investigate force matching at the shoulder before and after a suprascapular nerve block. The nerve block creates a sensory and muscle force mismatch between sides when matching loads. The torque matching accuracy did not change after the nerve block was administered. Directionally, the torque error was in the direction proposed by the corollary discharge hypothesis. However, the mismatch between deltoid EMG was substantially greater compared to the changes in the torque matching error after the block. The results support that sensory information is used during force matching tasks. However, since the nerve block also created a sensory disruption between sides, it is not clear how sensory information is reweighted following the nerve block and a role for sense of effort is still implicated.",
keywords = "Deltoid, EMG, Force perception, Isometric ramp contraction, Suprascapular nerve, Supraspinatus",
author = "David Phillips and Peter Kosek and Andrew Karduna",
year = "2019",
month = "1",
day = "1",
doi = "10.1007/s00221-019-05530-1",
language = "English",
journal = "Experimental Brain Research",
issn = "0014-4819",
publisher = "Springer Verlag",

}

Force perception at the shoulder after a unilateral suprascapular nerve block. / Phillips, David; Kosek, Peter; Karduna, Andrew.

In: Experimental Brain Research, 01.01.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Force perception at the shoulder after a unilateral suprascapular nerve block

AU - Phillips, David

AU - Kosek, Peter

AU - Karduna, Andrew

PY - 2019/1/1

Y1 - 2019/1/1

N2 - There are two key sources of information that can be used to match forces—the centrally generated sense of effort and afferent signals from mechanical receptors located in peripheral tissues. There is currently no consensus on which source of information is more important for matching forces. The corollary discharge hypothesis argues that subjects match forces using the centrally generated sense of effort. The purpose of this study was to investigate force matching at the shoulder before and after a suprascapular nerve block. The nerve block creates a sensory and muscle force mismatch between sides when matching loads. The torque matching accuracy did not change after the nerve block was administered. Directionally, the torque error was in the direction proposed by the corollary discharge hypothesis. However, the mismatch between deltoid EMG was substantially greater compared to the changes in the torque matching error after the block. The results support that sensory information is used during force matching tasks. However, since the nerve block also created a sensory disruption between sides, it is not clear how sensory information is reweighted following the nerve block and a role for sense of effort is still implicated.

AB - There are two key sources of information that can be used to match forces—the centrally generated sense of effort and afferent signals from mechanical receptors located in peripheral tissues. There is currently no consensus on which source of information is more important for matching forces. The corollary discharge hypothesis argues that subjects match forces using the centrally generated sense of effort. The purpose of this study was to investigate force matching at the shoulder before and after a suprascapular nerve block. The nerve block creates a sensory and muscle force mismatch between sides when matching loads. The torque matching accuracy did not change after the nerve block was administered. Directionally, the torque error was in the direction proposed by the corollary discharge hypothesis. However, the mismatch between deltoid EMG was substantially greater compared to the changes in the torque matching error after the block. The results support that sensory information is used during force matching tasks. However, since the nerve block also created a sensory disruption between sides, it is not clear how sensory information is reweighted following the nerve block and a role for sense of effort is still implicated.

KW - Deltoid

KW - EMG

KW - Force perception

KW - Isometric ramp contraction

KW - Suprascapular nerve

KW - Supraspinatus

UR - http://www.scopus.com/inward/record.url?scp=85064195550&partnerID=8YFLogxK

U2 - 10.1007/s00221-019-05530-1

DO - 10.1007/s00221-019-05530-1

M3 - Article

C2 - 30929033

AN - SCOPUS:85064195550

JO - Experimental Brain Research

JF - Experimental Brain Research

SN - 0014-4819

ER -