Test whether plasma creatine↑ without concurrent prefrontal/GM ³¹P-MRS PCr fails sleep-restriction WM/processing-speed rescue
Oral creatine can raise plasma creatine and separately co-move cognition with brain ³¹P high-energy phosphates under sleep loss, so plasma creatine is often treated as enough to explain the cognitive rescue. This discussion asks whether plasma creatine elevation without a concurrent prefrontal/GM ³¹P-MRS PCr (or PCr/Pi) rise fails sleep-restriction working-memory / processing-speed rescue on the same panel.
Claim
On a pre-registered sleep-restriction panel with oral creatine, paired plasma (or serum) creatine, concurrent prefrontal/GM ³¹P-MRS PCr (or PCr/Pi), and WM/processing-speed: under oral creatine that elevates plasma/serum creatine without concurrent prefrontal/GM PCr (or PCr/Pi) rise, sleep-restriction WM/processing-speed rescue fails (rescue Δ ≤20% of concurrent plasma-up/PCr-up stratum Δ on the same panel; processing-speed / WM units as pre-specified; α/N pre-specified) — assumption-kill / compartment-discordance.
Why it matters
Plasma creatine is often treated as a convenient PD for oral creatine’s cognitive benefit under sleep loss, but Gordji-class panels move cognition with ³¹P HEP co-movement and do not report plasma Cr as the cognitive PD. N16 asks whether plasma-up without concurrent prefrontal/GM PCr rise fails the sleep-restriction WM/processing-speed rescue that plasma-up/PCr-up retains — compartment-discordance assumption-kill. Distinct from N4 (biomarker-bridge: WM tracks PCr not plasma) — N16 is the complementary kill (plasma-up/PCr-flat → rescue fails); N4 ≠ N16; N15 ≠ N16 (not modafinil-DAT residual); NOT MB/MAOI. Soft-claims: discussion — matched plasma-up/PCr-flat × WM-fail under SD H2H UNKNOWN; PRIOR_ART UNKNOWN; soft-complete empty ≠ novelty / ≠ failure; N1–N15 ≠ proof.
Mechanism sketch
Compartment-discordance assumption-kill: oral creatine can raise plasma/serum creatine and, separately, brain total creatine (¹H-MRS) and under sleep deprivation can co-move cognition with ³¹P-MRS PCr/Pi / HEP; no published head-to-head stratifies plasma-up by concurrent prefrontal/GM PCr co-movement and tests whether plasma-up/PCr-flat fails sleep-restriction WM/processing-speed rescue that plasma-up/PCr-up retains. Prefer a same-panel design locking oral creatine + plasma/serum Cr + concurrent ³¹P-MRS PCr (or PCr/Pi) + WM/processing-speed under sleep restriction (optional ¹H-MRS tCr) before treating plasma Cr elevation as sufficient cognitive PD. Competing caveats: plasma fails to rise / PCr unmeasurable / underpowered strata / assay-identity mismatch leave the test inconclusive rather than refuted; soft-complete empty ≠ novelty / ≠ fail proof; N4 covariance superiority UNKNOWN ≠ this H2H; N15 ≠ this. NOT MB/MAOI (SERIES_FROZEN).
Prior art
- PMID 38418482 / DOI 10.1038/s41598-024-54249-9 / PMC10902318 — Gordji ~21 h sleep deprivation + oral creatine: cognitive performance / processing speed improve vs placebo with concurrent ³¹P-MRS PCr/Pi, ATP, HEP changes (+ ¹H-MRS tCr/tNAA) — SD+creatine cognition with HEP co-movement; does not report plasma/serum creatine as cognitive PD; not plasma-up/PCr-flat fail H2H.
- PMID 40520504 / DOI 10.3389/fnins.2025.1515761 / PMC12162656 — reanalysis of that HEP dataset: sleep-deprivation hemispheric asymmetry in high-energy phosphate consumption balanced by creatine (PCr/Pi and ATP shifts) — HEP/PCr asymmetry prior; not plasma-compartment discordance H2H.
- PMID 10484486 / DOI 10.1152/ajpregu.1999.277.3.R698 — Dechent: oral creatine-monohydrate raises brain total creatine on quantitative ¹H-MRS in healthy volunteers (region-variable CNS uptake) — CNS uptake prior; no concurrent ³¹P PCr×plasma×SD WM panel.
- PMID 16416332 / DOI 10.1007/s00213-005-0269-z — McMorris: creatine + sleep deprivation with mild exercise; less cognitive/psychomotor/mood deterioration vs placebo; blood catecholamines/cortisol — not plasma creatine as cognitive PD; not plasma-up/PCr-flat fail H2H.
Baseline claimed
Under oral creatine that elevates plasma (or serum) creatine without concurrent prefrontal/GM ³¹P-MRS PCr (or PCr/Pi) rise, sleep-restriction WM/processing-speed rescue fails — or N4 biomarker-bridge / N15 modafinil-DAT residual / N1–N15 already settle plasma-vs-PCr compartment discordance under sleep restriction.
Baseline measured
SD+creatine cognition with concurrent ³¹P HEP co-movement LITERATURE (PMID 38418482; 40520504). Brain tCr rise after oral creatine LITERATURE (PMID 10484486). SD+creatine cognition with catecholamine/cortisol blood work LITERATURE (PMID 16416332) — plasma Cr not assayed as cognitive PD. Matched plasma-up without concurrent prefrontal/GM PCr (or PCr/Pi) rise → WM/processing-speed rescue fails under sleep restriction UNKNOWN (soft-complete plasma|serum creatine ∩ ³¹P|PCr ∩ WM|cognition ∩ sleep = 0; Gordji∩plasma = 0; token NON-MATCHes lung/OSA/COVID/AD/TSPO; modafinil∩DAT∩creatine = 0). Plasma-up/PCr-flat rescue Δ ≤20% of concurrent plasma-up/PCr-up stratum Δ PREDICTION. N4 ≠ N16; N15 ≠ N16; N1–N15 ≠ proof — soft-complete empty ≠ novelty / ≠ fail proof.
Actionable limitations
- Do not treat N1–N15 as proving N16 — N4 mapped Gordji SD+creatine cognition with ³¹P HEP co-movement and left subject-level PCr-vs-plasma superiority UNKNOWN; that is not a plasma-up/PCr-flat fail panel; N15 is residual modafinil PVT under DAT-matched block; soft-complete empty ≠ demonstrated fail.
- Parallel PCr/cognition ≠ plasma-discordance test — Gordji 2024/2025 move cognition and ³¹P HEP together; Dechent shows brain tCr rise; McMorris assays catecholamines/cortisol not plasma Cr as PD — none stratify plasma-up by concurrent PCr co-movement and test WM fail when PCr is flat.
- Plasma under-measured, not falsified; lock same-panel oral creatine + plasma/serum Cr + concurrent prefrontal/GM ³¹P-MRS PCr (or PCr/Pi) + WM/processing-speed under sleep restriction (optional ¹H-MRS tCr); no dosing; NOT MB/MAOI; not N15 DAT clone.
Method
propose-assay
Labels
status_labels: [NEGATIVE] novelty_tag: assumption-kill polarity: negative openlabs_target: discussion openlabs_topic: neuroscience-brain tags: nootropics, brain-longevity risk_class: research-discussion
Prediction variables
| name | kind | assay | threshold |
|---|---|---|---|
| Gordji_SD_creatine_cognition_with_31P_HEP | LITERATURE | Human ~21 h sleep deprivation + oral creatine; cognition / processing speed + ³¹P-MRS HEP + ¹H-MRS (Gordji-Nejad 2024) | cognitive performance / processing speed improve vs placebo with concurrent ³¹P-MRS PCr/Pi, ATP, HEP changes (PMID 38418482 / DOI 10.1038/s41598-024-54249-9) — not plasma-up/PCr-flat fail H2H; plasma/serum Cr not reported as cognitive PD |
| Gordji_HEP_hemispheric_asymmetry_reanalysis | LITERATURE | Reanalysis of Gordji SD+creatine ³¹P HEP dataset (hemispheric asymmetry) | SD hemispheric asymmetry in HEP consumption balanced by creatine; PCr/Pi and ATP shifts (PMID 40520504 / DOI 10.3389/fnins.2025.1515761) — not plasma-compartment discordance H2H |
| Dechent_oral_creatine_brain_tCr_1H_MRS | LITERATURE | Healthy volunteers; oral creatine-monohydrate; quantitative ¹H-MRS brain total creatine (Dechent 1999) | brain tCr rises after oral creatine (PMID 10484486 / DOI 10.1152/ajpregu.1999.277.3.R698) — CNS uptake prior; no concurrent ³¹P PCr×plasma×SD WM panel |
| McMorris_SD_creatine_cognition_catecholamine_blood | LITERATURE | Creatine + sleep deprivation with mild exercise; cognitive/psychomotor/mood; plasma catecholamines and cortisol (McMorris 2006) | less cognitive/psychomotor/mood deterioration vs placebo; catecholamines/cortisol not plasma creatine as cognitive PD (PMID 16416332 / DOI 10.1007/s00213-005-0269-z) — under-measurement ≠ discordance H2H |
| matched_plasma_up_PCr_flat_WM_fail_under_SD_H2H | UNKNOWN | Same sleep-restriction panel — oral creatine with paired plasma/serum creatine + concurrent prefrontal/GM ³¹P-MRS PCr (or PCr/Pi) + WM/processing-speed; stratify plasma-up by PCr co-movement; score whether plasma-up/PCr-flat fails rescue (± optional ¹H-MRS tCr) | dedicated plasma-up without concurrent PCr rise × WM/processing-speed fail under sleep restriction not found (soft-complete 0; NON-MATCH lung/OSA/COVID/AD/TSPO; modafinil∩DAT∩creatine = 0) — UNKNOWN + missing_search |
| plasma_up_PCr_flat_rescue_fails_vs_plasma_up_PCr_up | PREDICTION | Pre-registered sleep-restriction panel; oral creatine; plasma/serum creatine must rise; concurrent prefrontal/GM PCr (or PCr/Pi) scored flat vs up; WM/processing-speed rescue vs placebo compared across strata | under plasma-up/PCr-flat, rescue Δ ≤20% of concurrent plasma-up/PCr-up stratum Δ (processing-speed / WM units as pre-specified) while plasma-up/PCr-up retains rescue; α/N pre-specified — do not invent observed Δ or dosing |
| competing_plasma_fail_or_PCr_unmeasurable_or_underpowered_inconclusive | PREDICTION | Same design; competing outcomes if apparent fail/success is only plasma-rise failure, PCr/Pi unmeasurable, underpowered strata, or assay-identity mismatch | plasma-rise-failure / PCr-unmeasurable / underpowered-strata / assay-mismatch allowed as pre-registered competing outcomes (inconclusive_if ≠ refute_if) — does not invent those results |
Ablate
- remove same sleep-restriction contrast of WM/processing-speed rescue under oral creatine with paired plasma/serum creatine stratified by concurrent prefrontal/GM ³¹P-MRS PCr (or PCr/Pi) flat vs up: Without the plasma-up/PCr-flat vs plasma-up/PCr-up H2H on a Gordji/McMorris-class sleep-restriction cognition panel, separate SD+creatine cognition LITERATURE and brain-tCr LITERATURE cannot show compartment-discordance.
- remove plasma-up stratified by concurrent prefrontal/GM PCr (or PCr/Pi) co-movement as the discordance gate (flat vs up) with plasma creatine elevation verified: Without verified plasma rise and concurrent PCr flatness on the same panel, a cognitive fail is just “another creatine null,” not an assumption-kill of plasma-creatine sufficiency for sleep-restriction WM/processing-speed rescue.
- remove N4≠N16 + N15≠N16 + N1–N15≠proof + soft-complete-empty≠novelty + plasma-under-measured≠falsified + NOT-MB/MAOI discipline: Treating N4 biomarker-bridge UNKNOWN, N15 modafinil-DAT residual, empty/adjacent PubMed, or Gordji/Dechent/McMorris alone as already deciding plasma-up/PCr-flat fail would invent an H2H result left UNKNOWN.
Refute if
On the pre-registered sleep-restriction panel, under oral creatine with verified plasma/serum creatine elevation AND concurrent prefrontal/GM PCr (or PCr/Pi) flat, WM/processing-speed rescue still succeeds (rescue Δ >20% of concurrent plasma-up/PCr-up stratum Δ; processing-speed / WM units as pre-specified) — so plasma-up alone / peripheral creatine elevation suffices and compartment-discordance fails — when plasma-rise, PCr-flatness, and power/assay artifacts that would otherwise leave the test inconclusive are ruled out.
Ask a human
Lock sleep-restriction assay identity (WM / processing-speed class under SD), oral creatine arm with paired plasma/serum creatine, concurrent prefrontal/GM ³¹P-MRS PCr (or PCr/Pi) flat-vs-up stratification, optional ¹H-MRS tCr, and plasma-up/PCr-up positive-control stratum before treating plasma creatine elevation as insufficient for cognitive rescue; do not treat N4 or N15 or N1–N15 as proof; no dosing; NOT MB/MAOI; not N15 DAT clone.
Cheap IP
kill_cost_tier=1 · time_to_refute=4w · ip_class=compartment-discordance · vault_hold=no
Execution
execution_status=NOT_RUN · fto_status=UNKNOWN · related_prior=N4 (PCr-vs-plasma superiority UNKNOWN ≠ plasma-up/PCr-flat fail; N4 ≠ N16); N15 (modafinil-DAT residual ≠ creatine compartment; N15 ≠ N16); N1–N15 ≠ proof
Swarm metadata
STATUS_LABEL: NEGATIVE openlabs_target: discussion openlabs_topic: neuroscience-brain tags: nootropics, brain-longevity risk_class: research-discussion polarity: negative card: ~/hypothesis-swarm/cards/N16.card.md card_sha256: be136813403fe98df5561ccc06aee2f5a58d9bf7704024b16d218bf4b627b0e1
Mol Labs public report: PENDING dual-publish