BRS1(FM5) - Excitatory–Inhibitory Balance (GABA–Glutamate Regulation)
1. Definition
Functional control of excitatory–inhibitory tone through GABA–glutamate balance, supporting neural stability, inhibitory control, and resistance to overstimulation.
2. Functional Outcome Context
These outcomes describe translational contexts for the FM as an integrated biological capacity. They are not single-mechanism treatment claims. Confidence may increase where multiple child PMs converge on the same functional outcome.
No functional outcome context currently mapped.
3. Intervention Breakdown
Food-State Leaning
4. Functional Role
↑ inhibitory tone support; ↑ GABA synthesis support; ↑ glutamate control; ↑ excitation–inhibition balance
5. Mechanistic Basis (Integrated FM Narrative)
Excitatory–inhibitory balance emerges from the coordinated interaction of several primary mechanisms and supporting biological pools.
5.1 Core Primary Mechanisms
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BRS1-FM5-PM6 — GABA–Glutamate Neurotransmission Balance Balance between inhibitory GABAergic tone and excitatory glutamatergic signalling relevant to attention, reactivity, and inhibitory control.
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BRS1-FM5-PM7 — GABA Synthesis Capacity Capacity to convert glutamate into GABA through glutamate decarboxylase-dependent synthesis.
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BRS1-FM5-PM8 — Glutamate Clearance & Recycling Control of glutamate accumulation through uptake, recycling, and buffering processes that protect against excessive excitatory signalling.
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BRS1-FM5-PM9 — Excitotoxicity Modulation Modulation of excessive glutamatergic drive and downstream excitotoxic stress relevant to neurostability and cognitive regulation.
5.2 Supporting Biological Pools (Key Constraints)
- BRS1(KC2) — Amino Acid Quality & Competitive Balance Provides the shared amino-acid quality and balance pool required for indispensable amino-acid completeness, LNAA ratios, and competitive transport context across multiple BRS1 mechanisms.
5.3 Integrated Functional Narrative
Together, these PMs operationalise BRS1(FM5) as coordinated excitatory–inhibitory balance regulation.
5.4 Functional Failure Modes
Excitatory–inhibitory balance may weaken when amino acid quality & competitive balance declines or when reliance on incomplete protein sources without complementary pairing.
Reliance on incomplete protein sources without complementary pairing may reduce BRS1(KC2) — Amino Acid Quality & Competitive Balance. Chronically low indispensable amino-acid coverage across meals may further strain pool availability, lNAA imbalance favouring transport competition away from key precursors, ultra-processed low-protein dietary patterns, while inconsistent protein distribution across the day.
These pressures may impair BRS1-FM5-PM6 — GABA–Glutamate Neurotransmission Balance, weaken BRS1-FM5-PM7 — GABA Synthesis Capacity, reduce the effectiveness of BRS1-FM5-PM8 — Glutamate Clearance & Recycling, and compromise BRS1-FM5-PM9 — Excitotoxicity Modulation. At the FM level, this may shift BRS1(FM5) toward reduced excitatory–inhibitory balance performance.
6. Connected Mechanisms
- BRS6-FM1-PM1 — Glycaemic Stability
- BRS3-FM1-PM1 — Inflammatory Tone Regulation
- BRS4-FM1-PM1 — Mitochondrial Bioenergetic Support