Roles of load-induced reorganization of multi-digit physiological tremors for a tracking maneuver

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This study was undertaken to investigate the effect of low-level loading on digit tracking and the associated physiological tremors in the moving and the stationary digits. Sixteen healthy adults conducted positional tracking with the middle finger under the loaded and unloaded conditions; meanwhile, trajectory of the middle finger, electromyographic activities of the extensor digitorum (ED)/flexor digitorum superficialis, and physiological tremors of the index, middle, ring, and little fingers were recorded. The results showed that load imposition (<70 g) on the middle finger improved tracking congruency, in association with reduction of inter-digit tremor coupling and enhancement of tiny movement jerks. Principal component analysis suggested that inertial load suppressed the 8-12 Hz central rhythm but potentiated the 25-40 Hz coherence spectra of major principal components and electromyographic signals of the ED. It was concluded that low-level inertial load could facilitate corrective movement adjustments and selective digit control during manual tracking, relevant implicitly to decreased common central drive and enhanced heteronymous reflex loops.

Original languageEnglish
Pages (from-to)175-186
Number of pages12
JournalEuropean Journal of Applied Physiology
Volume111
Issue number2
DOIs
Publication statusPublished - 2011 Feb 1

Fingerprint

Tremor
Fingers
Social Adjustment
Principal Component Analysis
Reflex

All Science Journal Classification (ASJC) codes

  • Orthopedics and Sports Medicine
  • Physiology (medical)
  • Public Health, Environmental and Occupational Health

Cite this

@article{7120eace2c224d2299dd9975786e5209,
title = "Roles of load-induced reorganization of multi-digit physiological tremors for a tracking maneuver",
abstract = "This study was undertaken to investigate the effect of low-level loading on digit tracking and the associated physiological tremors in the moving and the stationary digits. Sixteen healthy adults conducted positional tracking with the middle finger under the loaded and unloaded conditions; meanwhile, trajectory of the middle finger, electromyographic activities of the extensor digitorum (ED)/flexor digitorum superficialis, and physiological tremors of the index, middle, ring, and little fingers were recorded. The results showed that load imposition (<70 g) on the middle finger improved tracking congruency, in association with reduction of inter-digit tremor coupling and enhancement of tiny movement jerks. Principal component analysis suggested that inertial load suppressed the 8-12 Hz central rhythm but potentiated the 25-40 Hz coherence spectra of major principal components and electromyographic signals of the ED. It was concluded that low-level inertial load could facilitate corrective movement adjustments and selective digit control during manual tracking, relevant implicitly to decreased common central drive and enhanced heteronymous reflex loops.",
author = "Ing-Shiou Hwang",
year = "2011",
month = "2",
day = "1",
doi = "10.1007/s00421-010-1642-0",
language = "English",
volume = "111",
pages = "175--186",
journal = "European Journal of Applied Physiology",
issn = "1439-6319",
publisher = "Springer Verlag",
number = "2",

}

Roles of load-induced reorganization of multi-digit physiological tremors for a tracking maneuver. / Hwang, Ing-Shiou.

In: European Journal of Applied Physiology, Vol. 111, No. 2, 01.02.2011, p. 175-186.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Roles of load-induced reorganization of multi-digit physiological tremors for a tracking maneuver

AU - Hwang, Ing-Shiou

PY - 2011/2/1

Y1 - 2011/2/1

N2 - This study was undertaken to investigate the effect of low-level loading on digit tracking and the associated physiological tremors in the moving and the stationary digits. Sixteen healthy adults conducted positional tracking with the middle finger under the loaded and unloaded conditions; meanwhile, trajectory of the middle finger, electromyographic activities of the extensor digitorum (ED)/flexor digitorum superficialis, and physiological tremors of the index, middle, ring, and little fingers were recorded. The results showed that load imposition (<70 g) on the middle finger improved tracking congruency, in association with reduction of inter-digit tremor coupling and enhancement of tiny movement jerks. Principal component analysis suggested that inertial load suppressed the 8-12 Hz central rhythm but potentiated the 25-40 Hz coherence spectra of major principal components and electromyographic signals of the ED. It was concluded that low-level inertial load could facilitate corrective movement adjustments and selective digit control during manual tracking, relevant implicitly to decreased common central drive and enhanced heteronymous reflex loops.

AB - This study was undertaken to investigate the effect of low-level loading on digit tracking and the associated physiological tremors in the moving and the stationary digits. Sixteen healthy adults conducted positional tracking with the middle finger under the loaded and unloaded conditions; meanwhile, trajectory of the middle finger, electromyographic activities of the extensor digitorum (ED)/flexor digitorum superficialis, and physiological tremors of the index, middle, ring, and little fingers were recorded. The results showed that load imposition (<70 g) on the middle finger improved tracking congruency, in association with reduction of inter-digit tremor coupling and enhancement of tiny movement jerks. Principal component analysis suggested that inertial load suppressed the 8-12 Hz central rhythm but potentiated the 25-40 Hz coherence spectra of major principal components and electromyographic signals of the ED. It was concluded that low-level inertial load could facilitate corrective movement adjustments and selective digit control during manual tracking, relevant implicitly to decreased common central drive and enhanced heteronymous reflex loops.

UR - http://www.scopus.com/inward/record.url?scp=79651471296&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79651471296&partnerID=8YFLogxK

U2 - 10.1007/s00421-010-1642-0

DO - 10.1007/s00421-010-1642-0

M3 - Article

VL - 111

SP - 175

EP - 186

JO - European Journal of Applied Physiology

JF - European Journal of Applied Physiology

SN - 1439-6319

IS - 2

ER -