Emotional words evoke region- and valence-specific patterns of concurrent neuromodulator release in human thalamus and cortex.
Level 4 - case-series / case-control
Case series of invasive intracranial neurochemical measurements in humans
PubMed 39786997 · doi:10.1016/j.celrep.2024.115162
What was done
Researchers measured sub-second dynamics of dopamine, serotonin, and norepinephrine in humans evaluating positive, negative, and neutrally valenced words. Recordings were made in the thalamus (N = 13) and anterior cingulate cortex (N = 6).
What was found
The abstract reports no numerical values, concentrations, or statistical metrics. It reports that valenced words modulated neuromodulator release in both the thalamus and cortex with region- and valence-specific response patterns, and noted hemispheric dependence for dopamine release in the anterior cingulate cortex.
Why it matters
This provides direct in vivo human evidence that monoaminergic valence signaling extends to word semantics via complex, multi-transmitter patterns rather than a simple one-to-one mapping.
Limits
The sample size is very small (13 thalamic and 6 cortical recordings). The underlying clinical indications and patient characteristics are not described in the abstract. No quantitative effect sizes, baseline levels, or statistical thresholds are reported.