Time of day and days since the first scan are robust predictors of within-person variance in grey matter and total cortex volume¶
Claim · All claims
Evidence · 1 study · designr1·q2
Currency · newest study 2026 · not yet checked against its sources · not reviewed by a person
Subclaims¶
Reading the evidence codes
q is the design tier, i the impact, n the sample, and the kind with its r
the rigour judged within that kind: what each code means.
This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.
q2 i? In the prior Day2Day dense-sampling MRI study, time of day and days since the first scan were identified as robust predictors of within-person variance in grey matter and total cortex volume. → Falkenstein Kim 2026
Evidence¶
Falkenstein Kim 2026¶
Falkenstein Kim, Pauley Claire, Kühn Simone. (2026). Investigating effects of day-to-day variations in environmental exposure on the human brain: study protocol for the Day2Day Environment project. BMC Neuroscience. https://doi.org/10.1186/s12868-026-01052-z
q2 · i? · the article prints no effect size for this finding · design · r1
The protocol reports, citing the earlier Day2Day study (n = 6, ~50 MRI sessions per participant over six months), that "robust predictors of within-person variance in grey matter and total cortex volume were identified: time of day and days since the first scan". No effect sizes are printed.
"robust predictors of within-person variance in grey matter and total cortex volume were identified: time of day and days since the first scan"
Discussion¶
Related Claims¶
- Time spent outdoors in the 24 hours before scanning is positively associated with grey matter volume in the right dorsolateral prefrontal cortex — related
- Daily physiological changes in non-experimental situations influence measures of brain structure and function — a broader claim this one bears on
- Urban living is associated with higher activity in stress-related brain regions and reduced grey matter in dorsolateral prefrontal and pregenual anterior cingulate cortex after urban exposure during upbringing — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
time-of-day-and-scan-interval-predict-within-person-brain-volume-variance |
title |
Time of day and days since the first scan are robust predictors of within-person variance in grey matter and total cortex volume |
description |
Time of day and days since the first scan are robust predictors of within-person variance in grey matter and total cortex volume |
status |
review |
evidence_strength |
weak |
newest_evidence |
2026 |
generated |
by process:wiki-ingest on 2026-09-26 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — falkenstein-kim-2026 |
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