Finger force vectors in multi-finger prehension

Vladimir M. Zatsiorsky, Fan Gao, Mark L. Latash

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

In a majority of studies on grasp, only normal forces were measured and only when a zero torque was exerted on a hand-held object. This study concerns finger force vectors during the torque production tasks. Subjects (n=8) stabilized a handle with an attachment that allowed for change of external torque from -1.5 to 1.5Nm. Forces and moments exerted by the digit tips on the object were recorded. At the large (>-0.375Nm) supination torques the index/middle and ring/little pairs of fingers generated oppositely directed tangential forces. The index and middle finger produced forces in a downward direction and therefore did not support the load. At a zero torque and pronation torques, the middle, ring and little fingers produced forces along nearly the same direction. The vector of the index finger force was always directed differently from the vectors of other finger forces, the angles ranged from 19°30′ to 47°40′. The points of force application were systematically displaced with the torque, with the exception of the little finger. Tangential finger forces contributed substantially to the total torque exerted on the hand-held object.

Original languageEnglish (US)
Pages (from-to)1745-1749
Number of pages5
JournalJournal of Biomechanics
Volume36
Issue number11
DOIs
StatePublished - Nov 1 2003

Fingerprint

Torque
Fingers
Hand
Pronation
Supination
Hand Strength
Loads (forces)

Keywords

  • Finger forces
  • Grasping
  • Prehension

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

Cite this

Finger force vectors in multi-finger prehension. / Zatsiorsky, Vladimir M.; Gao, Fan; Latash, Mark L.

In: Journal of Biomechanics, Vol. 36, No. 11, 01.11.2003, p. 1745-1749.

Research output: Contribution to journalArticle

Zatsiorsky, Vladimir M. ; Gao, Fan ; Latash, Mark L. / Finger force vectors in multi-finger prehension. In: Journal of Biomechanics. 2003 ; Vol. 36, No. 11. pp. 1745-1749.
@article{1a046fe119cf4c418886806677c21226,
title = "Finger force vectors in multi-finger prehension",
abstract = "In a majority of studies on grasp, only normal forces were measured and only when a zero torque was exerted on a hand-held object. This study concerns finger force vectors during the torque production tasks. Subjects (n=8) stabilized a handle with an attachment that allowed for change of external torque from -1.5 to 1.5Nm. Forces and moments exerted by the digit tips on the object were recorded. At the large (>-0.375Nm) supination torques the index/middle and ring/little pairs of fingers generated oppositely directed tangential forces. The index and middle finger produced forces in a downward direction and therefore did not support the load. At a zero torque and pronation torques, the middle, ring and little fingers produced forces along nearly the same direction. The vector of the index finger force was always directed differently from the vectors of other finger forces, the angles ranged from 19°30′ to 47°40′. The points of force application were systematically displaced with the torque, with the exception of the little finger. Tangential finger forces contributed substantially to the total torque exerted on the hand-held object.",
keywords = "Finger forces, Grasping, Prehension",
author = "Zatsiorsky, {Vladimir M.} and Fan Gao and Latash, {Mark L.}",
year = "2003",
month = "11",
day = "1",
doi = "10.1016/S0021-9290(03)00062-9",
language = "English (US)",
volume = "36",
pages = "1745--1749",
journal = "Journal of Biomechanics",
issn = "0021-9290",
publisher = "Elsevier Limited",
number = "11",

}

TY - JOUR

T1 - Finger force vectors in multi-finger prehension

AU - Zatsiorsky, Vladimir M.

AU - Gao, Fan

AU - Latash, Mark L.

PY - 2003/11/1

Y1 - 2003/11/1

N2 - In a majority of studies on grasp, only normal forces were measured and only when a zero torque was exerted on a hand-held object. This study concerns finger force vectors during the torque production tasks. Subjects (n=8) stabilized a handle with an attachment that allowed for change of external torque from -1.5 to 1.5Nm. Forces and moments exerted by the digit tips on the object were recorded. At the large (>-0.375Nm) supination torques the index/middle and ring/little pairs of fingers generated oppositely directed tangential forces. The index and middle finger produced forces in a downward direction and therefore did not support the load. At a zero torque and pronation torques, the middle, ring and little fingers produced forces along nearly the same direction. The vector of the index finger force was always directed differently from the vectors of other finger forces, the angles ranged from 19°30′ to 47°40′. The points of force application were systematically displaced with the torque, with the exception of the little finger. Tangential finger forces contributed substantially to the total torque exerted on the hand-held object.

AB - In a majority of studies on grasp, only normal forces were measured and only when a zero torque was exerted on a hand-held object. This study concerns finger force vectors during the torque production tasks. Subjects (n=8) stabilized a handle with an attachment that allowed for change of external torque from -1.5 to 1.5Nm. Forces and moments exerted by the digit tips on the object were recorded. At the large (>-0.375Nm) supination torques the index/middle and ring/little pairs of fingers generated oppositely directed tangential forces. The index and middle finger produced forces in a downward direction and therefore did not support the load. At a zero torque and pronation torques, the middle, ring and little fingers produced forces along nearly the same direction. The vector of the index finger force was always directed differently from the vectors of other finger forces, the angles ranged from 19°30′ to 47°40′. The points of force application were systematically displaced with the torque, with the exception of the little finger. Tangential finger forces contributed substantially to the total torque exerted on the hand-held object.

KW - Finger forces

KW - Grasping

KW - Prehension

UR - http://www.scopus.com/inward/record.url?scp=0141569158&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0141569158&partnerID=8YFLogxK

U2 - 10.1016/S0021-9290(03)00062-9

DO - 10.1016/S0021-9290(03)00062-9

M3 - Article

VL - 36

SP - 1745

EP - 1749

JO - Journal of Biomechanics

JF - Journal of Biomechanics

SN - 0021-9290

IS - 11

ER -