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Open Imaging Index
MRI Brain

SKIP: Incentivized Reaching (ds005263)

SoCal Kinesia and Incentivization for Parkinson's Disease (SKIP): Incentivized Reaching

Task fMRI and structural brain MRI of healthy young adults making timed precision reaches for monetary reward or to avoid loss, collected to study how incentive valence drives movement initiation. 68 participants scanned at 3T, in BIDS under CC0.

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Overview

This OpenNeuro dataset is one of the task fMRI releases of SKIP (SoCal Kinesia and Incentivization for Parkinson's Disease), a project at the University of California, Santa Barbara on how incentives shape movement. Participants made fast, precise reaches to spatial targets while monetary stakes changed between trials. Most trials were standard; about one in five carried a high incentive, framed either as winning a large reward (jackpot) or as avoiding a large loss (robber), so the design contrasts positive and negative incentive valence. The first snapshot appeared in June 2024, and snapshot 1.0.1 (May 2026) replaced the anatomical images. The data are released under a CC0 waiver.

Composition

The release holds 68 right-handed healthy young adults aged 18 to 26: 49 women and 19 men in participants.tsv (the preprint reports 50 and 18). All 68 have a T1-weighted image, and 67 have three runs of the reaching task with event files. One participant has event files but no functional images. Although the project targets Parkinson's disease, this version contains no patients; the README says patient data and further assays will follow.

Acquisition

All scans come from one Siemens Prisma 3T scanner with a 64-channel head and neck coil at the UCSB Brain Imaging Center. The structural image is an MPRAGE with about 0.94 mm voxels. Task runs use multiband echo-planar imaging at 2.5 mm isotropic resolution with a TR of 1.9 s. Gradient-echo field maps (magnitude and phase difference) are included for distortion correction. Images are stored as uncompressed NIfTI in BIDS.

Annotations

There are no image annotations. Each run has an events file with trial timing and condition labels.

Known limitations

  • Healthy controls only, mostly students in a narrow age band, with about three women for every man.
  • For two participants the T1-weighted image sits in a nested anat/anat folder, and a third has a duplicate copy there.
  • Sex counts in participants.tsv differ by one from the preprint.
  • The linked paper is a preprint at the time of checking.

Cohort

Aggregate numbers from the sources below. Bars are relative to the 68 subjects.

Sex

  • Female 49 72%
  • Male 19 28%

sex in participants.tsv of ds005263 snapshot 1.0.1 (CC0), counted per row

Contrast / sequence

Groups can overlap

  • T1-weighted 68 100%
  • BOLD fMRI 67 99%

sub-*/anat/**/*_T1w.nii, sub-*/func/*_bold.nii in File tree of ds005263 snapshot 1.0.1 (CC0), NIfTI files counted per subject and BIDS suffix

Age

mean 20.8 ± 1.9, range 18 to 26

0
10
20
30
40
50
50
10-1920-29

age in participants.tsv of ds005263 snapshot 1.0.1 (CC0), counted per row; Methods, Experiment 2: Participants in Dundon et al. 2025, Incentive valence differentially engages open- and closed-loop basal ganglia circuits during movement initiation, bioRxiv preprint

Condition

Groups can overlap

  • Healthy control 68 100%

group in participants.tsv of ds005263 snapshot 1.0.1 (CC0), counted per row

Contrast combinations

How many subjects have exactly each set of contrasts.

T1wboldSubjects with exactly this set
67

anat and func folders in File tree of ds005263 snapshot 1.0.1 (CC0), NIfTI files counted per subject and BIDS suffix

License and access

Our reading of the license, not legal advice. Before you use the data, read the original license and confirm that your use is allowed. We take no responsibility for how you use a dataset. Full disclaimer

Access
Open download

Download without an account

Access page

Creative Commons Zero 1.0 Universal

Public domain dedication. Do anything with the data, including commercial use, without asking and without having to give credit.

dataset_description.json of snapshot 1.0.1 states "License" CC0.

Original license text Version read: 1.0 Checked 2026-10-07

What you can do

  • Yes
  • Yes
  • Yes
  • Yes
  • Yes

What you can share

  • Yes
  • Yes
  • Yes

What you must do

  • No
  • Share alike No
  • No
  • No
  • Manuscript review No
  • Release code No
  • Return results No
  • Delete after use No

Limits

  • No
  • Location limits No

Citation

Dundon NM, Rizor EJ, Stasiak JE, Wang J, Li T, Sabugo K, Villanueva C, Barandon P, Babenko V, Beverly-Aylwin R, Stump A, Santander T, Bostan AC, Lapate RC, Grafton ST. Incentive valence differentially engages open- and closed-loop basal ganglia circuits during movement initiation. bioRxiv (2025). doi:10.64898/2025.12.21.695842

Sources

Every number on this page comes from one of these documents. Each chart names the table or page it is taken from. The raw numbers are in stats.csv.