Spatial smoothing hurts localization but not information: Pitfalls for brain mappers

  title={Spatial smoothing hurts localization but not information: Pitfalls for brain mappers},
  author={Yukiyasu Kamitani and Yasuhito Sawahata},

Figures from this paper

Orientation Decoding in Human Visual Cortex: New Insights from an Unbiased Perspective

  • T. Carlson
  • Computer Science
    The Journal of Neuroscience
  • 2014
Hubel and Wiesel's (1972) classic ice-cube model of visual cortex is used to show that the orientation of gratings can be decoded from an unbiased representation and patterns of activity elicited by the edges of the stimulus are identified as the source of the decodable information.

Decoding information in the human hippocampus: A user's guide

What Makes a Pattern? Matching Decoding Methods to Data in Multivariate Pattern Analysis

It is concluded that for spatially localized analyses, such as searchlight and region of interest, multiple classification approaches should be compared in order to match fMRI analyses to the properties of local circuits.

The effect of acquisition resolution on orientation decoding from V1 BOLD fMRI at 7 Tesla

It is shown that higher-resolution scans with subsequent down-sampling or low-pass filtering yield no benefit over scans natively recorded in the corresponding lower resolution regarding decoding accuracy, and above chance-level contribution from large draining veins to orientation decoding is found.



How Much Cortex Can a Vein Drain? Downstream Dilution of Activation-Related Cerebral Blood Oxygenation Changes

The model leads to a quantitative prediction of the functional form of this dilution of venous blood that extends without dilution along the vein no more than 4.2 mm beyond the edge of the activated area.

Rigid Body Registration

Human Brain Function

Decoding the visual and subjective contents of the human brain

It is found that ensemble fMRI signals in early visual areas could reliably predict on individual trials which of eight stimulus orientations the subject was seeing, when subjects had to attend to one of two overlapping orthogonal gratings.