Cerebellar tDCS and visuomotor adaptation

Code to analyse behavioural data of visuomotor adaptation task performed during anodal or sham cerebellar stimulation.

written by Caroline Nettekoven, University of Oxford, 2016 - 2022.

• Within-subject, sham-controlled anodal tDCS study.
• Real stimulation parameters: 1.5 mA, 20 min

Figure 1. Cerebellar tDCS. Left shows the tDCS montage with the anode centered on the right cerebellar cortex and the cathode positioned over the right buccinator muscle. Right shows the electrical Field Magnitude in cerebellum induced by cerebellar anodal tDCS in a representative participant.

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Description

FILES

All are stored in folder ./data

Files available:
main_data.txt contains behavioural data
main_subjectlist.txt contains subject list

DATA

(text file ending in _data)
contains error data and information about experimental protocol

column 1 = error
column 2 = block number
column 3 = trial number (within-block)
column 4 = target
column 5 = rotation
column 6 = visual feedback ON yes or no
column 7 = Reaction Time
column 8 = Movement Onset
column 9 = Movement Offset
column 10 = Timepoint of peak velocity (is the same as RT)
column 11 = Peak Velocity
column 12 = Artefactual trial yes or no

SUBJECTS

(text file ending in _subjectlist)
contains subject name (is stored seperately from _data because matlab can't write out strings and numbers to the same text file)

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Steps to perform analysis.

1. Load datasets and calculate performance indices
   Run tdcs_get_behav_data.R

2. Calculate statistics
   Run tdcs_stats.R