Meanings
plural underactivations
- countableuncountableinadequate activation
A recent quantitative meta-analysis combining results from 65 fMRI studies (N = 1040 BD cases and 1074 healthy controls) found underactivation in the inferior frontal cortex and overactivation in limbic areas in BD patients relative to controls across emotional paradigms.
2015 July 30, “Altered Brain Activation during Emotional Face Processing in Relation to Both Diagnosis and Polygenic Risk of Bipolar Disorder”, in PLOS ONE, →DOI
Origin
- Proto-Indo-European*h₁én
- Proto-Indo-European*h₁entér
- Proto-Indo-European*h₂én
- Proto-Indo-European*dʰeh₁-?
- Proto-Indo-European*(H)n̥dʰí
- Proto-Indo-European*(H)n̥dʰér
- Proto-Germanic*under
- Proto-West Germanic*undar
- Old Englishunder-
- Middle Englishunder-
- Englishunder-
- Proto-Indo-European*h₂eǵ-
- Proto-Indo-European*h₂éǵeti
- Proto-Italic*agō
- Latinagō
- Ancient Greekἐνεργητικός (energētikós)
- Latināctīvu
- Old Frenchactif
- Middle Englishactyf
- Englishactive
- Englishactivate
- Englishactivation
- Englishunderactivation
From under- + activation.
Full word history & related roots →Cite this entry
underactivation. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/underactivation
“underactivation.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/underactivation. Accessed November 3, 2026.
WatkinsX Dictionary, s.v. “underactivation,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/underactivation.
Source: underactivation on Wiktionary, CC BY-SA 4.0.