title: Speed of human biological form and motion processing.
abstract: Recent work suggests that biological motion processing can begin within ~110 ms of stimulus onset, as indexed by the P1 component of the event-related potential (ERP). Here, we investigated whether modulation of the P1 component reflects configural processing alone, rather than the processing of both configuration and motion cues. A three-stimulus oddball task was employed to evaluate bottom-up processing of biological motion. Intact point-light walkers (PLWs) or scrambled PLWs served as distractor stimuli, whereas point-light displays of tool motion served as standard and target stimuli. In a second experiment, the same design was used, but the dynamic stimuli were replaced with static point-light displays. The first experiment revealed that dynamic PLWs elicited a larger P1 as compared to scrambled PLWs. A similar P1 increase was also observed for static PLWs in the second experiment, indicating that these stimuli were more salient than static, scrambled PLWs. These findings suggest that the visual system can rapidly extract global form information from static PLWs and that the observed P1 effect for dynamic PLWs is not dependent on the presence of motion cues. Finally, we found that the N1 component was sensitive to dynamic, but not static, PLWs, suggesting that this component reflects the processing of both form and motion information. The sensitivity of P1 to static PLWs has implications for dynamic form models of biological motion processing that posit temporal integration of configural cues present in individual frames of PLW animations.
authors.affiliation: Department of Psychology, George Mason University, Fairfax, Virginia, United States of America.
authors.forename: George
authors.initials: G
authors.lastname: Buzzell
authors.forename: Laura
authors.initials: L
authors.lastname: Chubb
authors.forename: Ashley S
authors.initials: AS
authors.lastname: Safford
authors.forename: James C
authors.initials: JC
authors.lastname: Thompson
authors.forename: Craig G
authors.initials: CG
authors.lastname: McDonald
mesh_terms: D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D009039:Motion Perception / Q000502:physiology*; D010775:Photic Stimulation
references.citation: Neurosci Lett. 2003 Jun 19;344(1):41-4
references.pmid: 12781917
references.citation: J Cogn Neurosci. 2008 Jan;20(1):120-34
references.pmid: 17919081
references.citation: Neuroreport. 2009 Oct 7;20(15):1334-8
references.pmid: 19687766
references.citation: Clin Neurophysiol. 1999 Jan;110(1):24-30
references.pmid: 10348317
references.citation: Int J Psychophysiol. 2006 Jan;59(1):8-14
references.pmid: 16253363
references.citation: Philos Trans R Soc Lond B Biol Sci. 1998 Aug 29;353(1373):1257-70
references.pmid: 9770220
references.citation: Proc Natl Acad Sci U S A. 2002 Apr 16;99(8):5661-3
references.pmid: 11960019
references.citation: Vis Neurosci. 1990 Oct;5(4):353-69
references.pmid: 2265150
references.citation: Front Hum Neurosci. 2011 Sep 15;5:93
references.pmid: 21954382
references.citation: J Neurosci. 2010 Jul 7;30(27):9064-73
references.pmid: 20610740
references.citation: Neurosci Biobehav Rev. 2001 Jun;25(4):355-73
references.pmid: 11445140
references.citation: Psychophysiology. 2012 Oct;49(10):1384-93
references.pmid: 22906001
references.citation: J Exp Psychol Hum Percept Perform. 1991 Nov;17(4):1057-74
references.pmid: 1837297
references.citation: Curr Biol. 2004 Jun 22;14(12):1084-9
references.pmid: 15203001
references.citation: Neuroimage. 2012 Jan 2;59(1):4-13
references.pmid: 21640836
references.citation: Cognition. 2006 Feb;99(1):B15-29
references.pmid: 16051211
references.citation: Cereb Cortex. 2004 Feb;14(2):181-8
references.pmid: 14704215
references.citation: Front Hum Neurosci. 2011 Dec 01;5:156
references.pmid: 22144959
references.citation: Nat Rev Neurosci. 2003 Mar;4(3):179-92
references.pmid: 12612631
references.citation: Behav Brain Res. 2005 Feb 28;157(2):195-204
references.pmid: 15639170
references.citation: Proc Natl Acad Sci U S A. 1998 Feb 3;95(3):781-7
references.pmid: 9448241
references.citation: Biol Psychol. 2003 Jul;63(3):199-236
references.pmid: 12853168
references.citation: Nat Neurosci. 2009 Jan;12(1):24-5
references.pmid: 19029890
references.citation: J Cogn Neurosci. 2005 Dec;17(12):1936-49
references.pmid: 16356330
references.citation: Neuroimage. 2011 May 1;56(1):373-83
references.pmid: 21276862
references.citation: Psychophysiology. 2010 Jan 1;47(1):147-57
references.pmid: 19761525
references.citation: J Neurosci. 2006 Mar 15;26(11):2894-906
references.pmid: 16540566
references.citation: Annu Rev Psychol. 2007;58:47-73
references.pmid: 16903802
references.citation: J Neurosci Methods. 2004 Mar 15;134(1):9-21
references.pmid: 15102499
references.citation: Cereb Cortex. 2006 Mar;16(3):321-7
references.pmid: 15901655