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Motion-Dependent Representation of Space in Area MT+
Gerrit W. Maus, Jason Fischer, David Whitney Neuron Volume 78, Issue 3, Pages (May 2013) DOI: /j.neuron Copyright © 2013 Elsevier Inc. Terms and Conditions
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Figure 1 The Flash-Drag Effect
Visual motion can change the perceived position of brief flashes presented nearby; i.e., they appear “dragged” in the direction of motion. Neuron , DOI: ( /j.neuron ) Copyright © 2013 Elsevier Inc. Terms and Conditions
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Figure 2 Stimulus and Conditions in the fMRI Experiment
(A) Gratings along the visual field meridians oscillated between inward and outward motion, and flashes were presented once per cycle in the space between the gratings. (B) Both IM and OM conditions contained inward and outward motion, only the timing of the flashes relative to the phase of the oscillating motion changed. (C) In IS and OS conditions, the physical position of flashes was shifted inward or outward by one bar width. See also Figure S1. Neuron , DOI: ( /j.neuron ) Copyright © 2013 Elsevier Inc. Terms and Conditions
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Figure 3 Multivoxel Pattern Analysis Strategy
(A) We calculated differences between flashes presented during inward and outward motion (IM-OM) and flashes in physical positions shifted inward and outward (IS-OS). Insets show maps for MT+ in one subject (the relevant color code can be found in [B]). (B) These difference maps were correlated with each other for an ROI responding to the flashes within area MT+ (one subject shown; each point on the correlation plot is one voxel within MT+). A positive correlation signifies a similar representation of illusorily and physically shifted flashes. (C) A histogram of resulting correlation values for the same voxels after random shuffling of condition labels. See also Figure S2. Neuron , DOI: ( /j.neuron ) Copyright © 2013 Elsevier Inc. Terms and Conditions
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Figure 4 Results of the Multivoxel Pattern Analysis
Mean correlation scores (n = 6) are shown for ROIs in V1–V3A and MT+. Error bars represent bootstrapped 95% confidence intervals. See also Figure S3. Neuron , DOI: ( /j.neuron ) Copyright © 2013 Elsevier Inc. Terms and Conditions
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