Perceptually relevant remapping of human somatotopy in 24 hours
- University of Oxford, United Kingdom
- University College, United Kingdom
- University College London, United Kingdom
Figures
Figure 1 with 3 supplements
Patterns of rapid experience-dependent remapping in human SI.
(A) An example digit map from an individual participant and session, shown on an inflated brain surface (bottom right), and a zoomed panel (Threshold FDR α = 0.01); sulci and gyri are shown in dark …
-
Figure 1—source data 1
Data presented in Figure 1B.
DICE coefficients representing digit overlap for three digit pairs (D2–D3, D3–D4 and D4–D5) across three conditions (Control 1, Control 2 and Glued).
- https://doi.org/10.7554/eLife.17280.004
Figure 1—figure supplement 1
Cortical surface area of individual digit representations used in calculation of DICE coefficient at each time point.
No significant change in cortical digit surface area was observed across the three time points under study (Control 1, Control 2 and Glue); two-way repeated measures ANOVA indicated no significant …
Figure 1—figure supplement 2
Overview of the fMRI experiment and the behavioural experiment study design.
The order of conditions was counterbalanced across participants, resulting in four participants experiencing the control period first (Order A; top row), and five participants experiencing the …
Figure 1—figure supplement 3
Data presented in Figure 1B split according to the order of sessions.
(A) Order A (Control 1 separated by 4 weeks from Control 2 and Glued): n = 4; Order B (Glued separated by 4 weeks from Control 1 and Control 2), n = 5.
Figure 2
Pattern of shift in the cortical representation of digit 4 from inter-digit overlap analysis.
Data displayed for all nine participants (A–I) showing the outline of the digit 4 representation mapped during the three sessions (Control 1, Control 2, Glued) overlaid on the individual …
Figure 3
Representational similarity analysis of block design data yields complementary evidence of shift in the S1 representation of digit 4 away from digit 3 and towards digit 5.
(A) Noise normalised parameter estimates from a standard GLM for each digit were used to construct representational dissimilarity matrices (RDMs) using Euclidean distance within a hand knob ROI …
-
Figure 3—source data 1
Data presented Figure 3A.
Representational similarity analysis distance metrics for adjacent digit pairs (D2–D3, D3–D4 and D4–D5) across three conditions (Control 1, Control 2 and Glued).
- https://doi.org/10.7554/eLife.17280.010
Figure 4 with 1 supplement
Patterns of rapid experience-dependent remapping in SI mirror peripheral changes in tactile discrimination performance.
(A) An example of accuracy data from the temporal order judgment task. Accuracy scores (black dots) are illustrated for an individual participant and a single run assessing performance across D2-D3. …
-
Figure 4—source data 1
Data presented Figure 4B.
Just Noticeable Difference (JND) values representing tactile discrimination ability for three digit pairs (D2–D3, D3–D4 and D4–D5) across three conditions (Control 1, Control 2 and Glued).
- https://doi.org/10.7554/eLife.17280.012
-
Figure 4—source data 2
Data presented Figure 4—figure supplement 1B.
Frequency of mis-localisations for motor confusion task across adjacent digit pairs (D2–D3, D3–D4 and D4–D5) across three conditions (Control 1, Control 2 and Glued).
- https://doi.org/10.7554/eLife.17280.013
Figure 4—figure supplement 1
In a motor confusion task involving rapid button presses using the four digits under study (D2, D3, D4, D5) there is an increase in the number of mis-presses between digits 4 and 5, consistent with the observed pattern of increased cortical overlap and representational similarity observed between digit 4 and 5.
(A) Distribution of presses and mis-presses for each target and each digit, averaged across Control 1 and Control 2, demonstrating a pattern of mis-presses predominantly in digits adjacent to the …
Additional files
-
Supplementary file 1
Consistent patterns of peak-to-peak distance (mm) in cortical z-statistic digit representations.
The observed consistency was quantified with Cronbach’s α for each digit pair across the three time points. The resulting values support a high degree of consistency in the relative peak-to-peak distance across the observed digit maps over time.
- https://doi.org/10.7554/eLife.17280.015
-
Supplementary file 2
Summary of goodness of fit between phase-encoding model and fMRI data for each digit and timepoint.
These values support a high degree of consistency in the model fit within each participant and digit across the fMRI time points: 181 TRs of fMRI data.
- https://doi.org/10.7554/eLife.17280.016
-
Supplementary file 3
Demographic information for participants recruited to fMRI and behavioural cohorts.
F: female, M: Male, R: right handed.
- https://doi.org/10.7554/eLife.17280.017
-
Supplementary file 4
Full statistical outputs for repeated measures ANOVAs and simple main effects analyses.
- https://doi.org/10.7554/eLife.17280.018
