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Volume 10, Issue 1, Pages (January 2000)

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1 Volume 10, Issue 1, Pages 16-22 (January 2000)
The functional neuroanatomy of implicit-motion perception or ‘representational momentum’  C. Senior, J. Barnes, V. Giampietroc, A. Simmons, E.T. Bullmore, M. Brammer, A.S. David  Current Biology  Volume 10, Issue 1, Pages (January 2000) DOI: /S (99)

2 Figure 1 Bar chart showing mean reaction times for the ‘forward’ and ‘backward’ direction pairs for all stimuli used in the current study (forward > backward=representational momentum). Data taken from [33] (n=19). Current Biology  , 16-22DOI: ( /S (99) )

3 Figure 2 Median generic brain activation maps of activated voxels registered in the space of a high resolution spoiled GRASS (SPGR) template. Four axial slices at Talairach z coordinates +4, +8, +16 and +20 are shown. These contain > 95% of the voxels activated with a probability of a type I error < Activity revealed for the actual-motion perception task is coloured red, for the representational momentum task is coloured yellow, whereas coincident voxels are blue. Stereotactic (X, Y, Z) coordinates for the centre of coincident clusters, with respective voxel numbers in brackets, are 46,–69, 8 (17); −40, −75, 8 (15); 49, −64, 16 (11) and −43, −78, 4 (10). Current Biology  , 16-22DOI: ( /S (99) )

4 Figure 3 Orthogonal projection image illustrating activity overlap in the implied- and actual-motion experiments mapped to the standard space of Talaraich and Tournoux. Transverse, sagittal and coronal slices are shown to illustrate activity within the V5 system and bilateral posterior satellites (yellow), revealed during the representational momentum task only. The mean coordinates of the cross-hairs are (X=−50, Y=−70, Z=+4). Current Biology  , 16-22DOI: ( /S (99) )

5 Figure 4 Periodic time course of the averaged BOLD fMRI signal within the V5 system for five subjects. The black line is the raw time series and the red line the model fitted to the data. The x-axis denotes magnetic resonance signal in arbitary units; the y-axis denotes the sequence of acquired images over time (1 image=3 sec). Current Biology  , 16-22DOI: ( /S (99) )

6 Figure 5 Schematic representation of the actual-motion fMRI experiment. Each of the experimental epochs (on and off) are 30 sec long, making up the total test time of 5 min. The off, or control, phase consisted of stills that implied no motion. This was contrasted with a 4 sec video excerpt of the same target item in motion. Current Biology  , 16-22DOI: ( /S (99) )

7 Figure 6 Schematic representation of the implied-motion fMRI experiment. The experimental epochs are the same size as the actual-motion experiment (30 sec) and the control, or off phase again consisted of stills that implied no motion. However, these were contrasted with stills inducing representational momentum. Representational momentum and control stills were presented each for 250 msec with a 250 msec ISI. Current Biology  , 16-22DOI: ( /S (99) )


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