title: Control of interceptive actions is based on expectancy of time to target arrival.
abstract: In this study the hypothesis that interceptive movements are controlled on the basis of expectancy of time to target arrival was tested. The study was conducted through assessment of temporal errors and kinematics of interceptive movements to a moving virtual target. Initial target velocity was kept unchanged in part of the trials, and in the others it was decreased 300 ms before the due time of target arrival at the interception position, increasing in 100 ms time to target arrival. Different probabilities of velocity decrease ranging from 25 to 100% were compared. The results revealed that while there were increasing errors between probabilities of 25 and 75% for unchanged target velocity, the opposite relationship was observed for target velocity decrease. Kinematic analysis indicated that movement timing adjustments to target velocity decrease were made online. These results support the conception that visuomotor integration in the interception of moving targets is mediated by an internal forward model whose weights can be flexibly adjusted according to expectancy of time to target arrival.
authors.affiliation: Human Motor Systems Laboratory, School of Physical Education and Sport, University of São Paulo, São Paulo, SP, 05508-900, Brazil. guingo9@yahoo.com.br
authors.forename: Raymundo Machado
authors.initials: RM
authors.lastname: de Azevedo Neto
authors.forename: Luis Augusto
authors.initials: LA
authors.lastname: Teixeira
mesh_terms: D000222:Adaptation, Physiological / Q000502:physiology; D000293:Adolescent; D000328:Adult; D001696:Biomechanical Phenomena; D056344:Executive Function / Q000502:physiology; D005260:Female; D006801:Humans; D007600:Judgment / Q000502:physiology*; D008297:Male; D009039:Motion Perception / Q000502:physiology*; D009068:Movement / Q000502:physiology*; D009483:Neuropsychological Tests; D009949:Orientation / Q000502:physiology; D010775:Photic Stimulation; D011336:Probability; D011597:Psychomotor Performance / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology; D013028:Space Perception / Q000502:physiology*; D013997:Time Factors; D013998:Time Perception / Q000502:physiology*; D055815:Young Adult
references.citation: Perception. 1992;21(1):91-115
references.pmid: 1528708
references.citation: Q J Exp Psychol A. 2001 Feb;54(1):69-93
references.pmid: 11216322
references.citation: Exp Brain Res. 2004 Apr;155(4):427-38
references.pmid: 15045207
references.citation: Exp Brain Res. 1989;78(1):139-46
references.pmid: 2591508
references.citation: Exp Brain Res. 2005 Aug;165(1):28-36
references.pmid: 15868174
references.citation: Nat Neurosci. 2000 Dec;3(12):1340-5
references.pmid: 11100157
references.citation: J Exp Psychol Hum Percept Perform. 1991 May;17(2):315-22
references.pmid: 1830077
references.citation: Neuropsychologia. 2008 Feb 12;46(3):774-85
references.pmid: 18037456
references.citation: Can J Physiol Pharmacol. 1994 May;72(5):535-41
references.pmid: 7954083
references.citation: Science. 2005 Apr 15;308(5720):416-9
references.pmid: 15831760
references.citation: Vision Res. 2002 May;42(11):1465-73
references.pmid: 12044752
references.citation: J Mot Behav. 1986 Jun;18(2):225-38
references.pmid: 15136281
references.citation: Nat Neurosci. 2001 Jul;4(7):693-4
references.pmid: 11426224
references.citation: J Exp Psychol Hum Percept Perform. 2003 Feb;29(1):219-37
references.pmid: 12669759
references.citation: Exp Brain Res. 1999 Mar;125(1):61-6
references.pmid: 10100977
references.citation: J Sports Sci. 2005 Sep;23(9):943-50
references.pmid: 16195046
references.citation: Neural Netw. 2002 Mar;15(2):163-79
references.pmid: 12022506
references.citation: J Mot Behav. 1994 Jun;26(2):135-46
references.pmid: 15753066
references.citation: Perception. 1993;22(6):653-80
references.pmid: 8255697
references.citation: Hum Mov Sci. 2005 Jun;24(3):429-45
references.pmid: 16098622
references.citation: Acta Psychol (Amst). 1999 Nov;103(1-2):21-45
references.pmid: 10555485
references.citation: Exp Brain Res. 2001 Jul;139(2):151-9
references.pmid: 11497056
references.citation: Trends Neurosci. 1992 Jan;15(1):20-5
references.pmid: 1374953
references.citation: Exp Brain Res. 2004 Jul;157(2):181-96
references.pmid: 14991210
references.citation: J Neurophysiol. 2000 Jun;83(6):3483-96
references.pmid: 10848564
references.citation: Behav Brain Sci. 2008 Apr;31(2):179-98; discussion 198-239
references.pmid: 18479557
references.citation: Exp Brain Res. 2003 Oct;152(3):368-75
references.pmid: 12898090
references.citation: J Neurophysiol. 1998 Jun;79(6):3272-8
references.pmid: 9636126
references.citation: J Neurosci. 2004 Mar 31;24(13):3223-34
references.pmid: 15056701
references.citation: Exp Brain Res. 2001 Mar;137(2):246-8
references.pmid: 11315554
references.citation: J Neurophysiol. 2004 Apr;91(4):1620-34
references.pmid: 14627663
references.citation: Motor Control. 2003 Apr;7(2):103-10
references.pmid: 13679625
references.citation: Q J Exp Psychol A. 1983 May;35(Pt 2):333-46
references.pmid: 6571315
references.citation: Curr Biol. 2003 Apr 29;13(9):749-53
references.pmid: 12725732
references.citation: J Exp Psychol Hum Percept Perform. 2002 Oct;28(5):1131-48
references.pmid: 12421060
references.citation: J Neurophysiol. 2005 Feb;93(2):1055-68
references.pmid: 15456796
references.citation: J Mot Behav. 2006 Nov;38(6):467-77
references.pmid: 17138530
references.citation: J Neurophysiol. 2005 Aug;94(2):1346-57
references.pmid: 15817649
references.citation: Exp Brain Res. 2003 Nov;153(2):171-9
references.pmid: 13680044
references.citation: Psychol Sci. 2002 Nov;13(6):542-7
references.pmid: 12430839
references.citation: Exp Brain Res. 2009 Feb;192(4):571-604
references.pmid: 19139857
references.citation: Motor Control. 2006 Apr;10(2):93-108
references.pmid: 16871007
references.citation: Perception. 1987;16(1):49-59
references.pmid: 3671040
references.citation: J Neurophysiol. 1981 Oct;46(4):725-43
references.pmid: 7288461