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The influence of advance knowledge of ball speed on postural adjustments in one-handed catching

Pieter Tijtgat UGent, Jos Vanrenterghem, Simon Bennett, Dirk De Clercq UGent, Geert Savelsbergh and Matthieu Lenoir UGent (2012) ISPGR/Gait & Mental Function 1st joint world congress : symposia, oral and poster sessions : authors, titles, affiliations and abstracts. p.276-277
abstract
BACKGROUND AND AIM: Postural adjustments to an upcoming support-surface perturbation of balance have been shown to be affected by advance knowledge of the amplitude and speed of perturbation [1], which has been contributed to activity of the cerebral cortex [2]. While advance knowledge in one-handed catching has recently been shown to influence the kinematics of the arm when there is certainty about the speed of the ball [3], this study examined how this implicit advance knowledge might also have an effect on postural adjustments. METHODS: 6 skilled ball catchers performed one-handed catches with (blocked-order) and without (random-order) implicit advance knowledge of upcoming ball speed. Measurement of full body kinematics (Qualisys) and kinetics (AMTI force plate) enabled to analyze the postural adjustments while raising the arm for catching. RESULTS: A repeated measures ANOVA analysis showed that providing implicit advance knowledge induced a forward arm raising movement scaled to ball speed in the initial transport phase (p<0.05, Fig. 1a, [3]). However, the accompanying backward postural adjustments were unaffected, which is suggestive of a passive control mechanism. In the subsequent grasping phase (Fig. 1b), the scaling of arm raising movement exhibited in the presence of implicit advance knowledge resulted in a reduced need for postural adjustments, particularly at the highest ball speed (p<0.05). CONCLUSIONS: Advance knowledge of ball speed does not only influence the arm movement kinematics when catching a ball, but seems to have an additional effect on the accompanying postural adjustments to help compensate for the disturbing effect of arm motion. REFERENCES 1. Horak et al. J Neurophysiol. 62:841-853, 1989 2. Jacobs et al. Clin Neurophysiol. 119:1431-1442, 2008 3. Tijtgat et al. Exp Brain Res. 201:875-884, 2010
Please use this url to cite or link to this publication:
author
organization
year
type
conference
publication status
published
subject
in
ISPGR/Gait & Mental Function 1st joint world congress : symposia, oral and poster sessions : authors, titles, affiliations and abstracts
pages
276 - 277
conference name
20th World Congress of the International Society for Posture and Gait Research (ISPGR) ; 1st Joint world congress of ISPGR and Gait & Mental Function
conference location
Trondhei, Norway
conference start
2012-06-24
conference end
2012-06-28
language
English
UGent publication?
yes
classification
C3
copyright statement
I have transferred the copyright for this publication to the publisher
id
2957336
handle
http://hdl.handle.net/1854/LU-2957336
alternative location
http://ispgr.org/fileadmin/templates/_img/norway2012/ISPGR_full_abstract_listing_SOP_2012_06_22_web.pdf
date created
2012-07-06 14:13:13
date last changed
2012-08-02 13:16:52
@inproceedings{2957336,
  abstract     = {BACKGROUND AND AIM: Postural adjustments to an upcoming support-surface perturbation of balance have been shown to be affected by advance knowledge of the amplitude and speed of perturbation [1], which has been contributed to activity of the cerebral cortex [2]. While advance knowledge in one-handed catching has recently been shown to influence the kinematics of the arm when there is certainty about the speed of the ball [3], this study examined how this implicit advance knowledge might also have an effect on postural adjustments. 
METHODS: 6 skilled ball catchers performed one-handed catches with (blocked-order) and without (random-order) implicit advance knowledge of upcoming ball speed. Measurement of full body kinematics (Qualisys) and kinetics (AMTI force plate) enabled to analyze the postural adjustments while raising the arm for catching. 
RESULTS: A repeated measures ANOVA analysis showed that providing implicit advance knowledge induced a forward arm raising movement scaled to ball speed in the initial transport phase (p{\textlangle}0.05, Fig. 1a, [3]). However, the accompanying backward postural adjustments were unaffected, which is suggestive of a passive control mechanism. In the subsequent grasping phase (Fig. 1b), the scaling of arm raising movement exhibited in the presence of implicit advance knowledge resulted in a reduced need for postural adjustments, particularly at the highest ball speed (p{\textlangle}0.05). 
CONCLUSIONS: Advance knowledge of ball speed does not only influence the arm movement kinematics when catching a ball, but seems to have an additional effect on the accompanying postural adjustments to help compensate for the disturbing effect of arm motion. 
REFERENCES 
1.\unmatched{0009}Horak et al. J Neurophysiol. 62:841-853, 1989
2.\unmatched{0009}Jacobs et al. Clin Neurophysiol. 119:1431-1442, 2008
3.\unmatched{0009}Tijtgat et al. Exp Brain Res. 201:875-884, 2010},
  author       = {Tijtgat, Pieter and Vanrenterghem, Jos and Bennett, Simon and De Clercq, Dirk and Savelsbergh, Geert and Lenoir, Matthieu},
  booktitle    = {ISPGR/Gait \& Mental Function 1st joint world congress : symposia, oral and poster sessions : authors, titles, affiliations and abstracts},
  language     = {eng},
  location     = {Trondhei, Norway},
  pages        = {276--277},
  title        = {The influence of advance knowledge of ball speed on postural adjustments in one-handed catching},
  url          = {http://ispgr.org/fileadmin/templates/\_img/norway2012/ISPGR\_full\_abstract\_listing\_SOP\_2012\_06\_22\_web.pdf},
  year         = {2012},
}

Chicago
Tijtgat, Pieter, Jos Vanrenterghem, Simon Bennett, Dirk De Clercq, Geert Savelsbergh, and Matthieu Lenoir. 2012. “The Influence of Advance Knowledge of Ball Speed on Postural Adjustments in One-handed Catching.” In ISPGR/Gait & Mental Function 1st Joint World Congress : Symposia, Oral and Poster Sessions : Authors, Titles, Affiliations and Abstracts, 276–277.
APA
Tijtgat, P., Vanrenterghem, J., Bennett, S., De Clercq, D., Savelsbergh, G., & Lenoir, M. (2012). The influence of advance knowledge of ball speed on postural adjustments in one-handed catching. ISPGR/Gait & Mental Function 1st joint world congress : symposia, oral and poster sessions : authors, titles, affiliations and abstracts (pp. 276–277). Presented at the 20th World Congress of the International Society for Posture and Gait Research (ISPGR) ; 1st Joint world congress of ISPGR and Gait & Mental Function.
Vancouver
1.
Tijtgat P, Vanrenterghem J, Bennett S, De Clercq D, Savelsbergh G, Lenoir M. The influence of advance knowledge of ball speed on postural adjustments in one-handed catching. ISPGR/Gait & Mental Function 1st joint world congress : symposia, oral and poster sessions : authors, titles, affiliations and abstracts. 2012. p. 276–7.
MLA
Tijtgat, Pieter, Jos Vanrenterghem, Simon Bennett, et al. “The Influence of Advance Knowledge of Ball Speed on Postural Adjustments in One-handed Catching.” ISPGR/Gait & Mental Function 1st Joint World Congress : Symposia, Oral and Poster Sessions : Authors, Titles, Affiliations and Abstracts. 2012. 276–277. Print.