A neuroimaging study used a pharmacologic challenge to construct a model of excitation–inhibition balance. Its developmental estimates were indirect imaging inferences rather than direct measurements of synaptic currents.
The model and application
The researchers generated a multivariate functional-connectivity model using a GABAergic benzodiazepine challenge. They applied the model to an independent sample of 879 young people aged eight to twenty-two.
The model predicted developmental reductions in excitation–inhibition ratio in association cortex and found relationships with psychopathology. The challenge supplied a reference pattern for the imaging analysis.
What the inference cannot establish
Functional connectivity is influenced by acquisition and analysis choices. The authors noted that longer scan durations could improve reliability of the estimates.
The developmental application was not a trial treating young people with benzodiazepines. It does not establish that medication improves brain maturation or permits a diagnosis from a single inferred ratio. Preserve the distinction between a pharmacologically informed model, a developmental association, and direct neurophysiologic evidence when describing what the findings mean.
Source paper
Original analysis of the supplied journal article, identified as PMC8816330.
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