Some disparate facts on brain laterality that I haven’t connected yet because I’m not using both sides of my brain:
Right handed-ness is associated with extra wiring in the left side of the brain, even in chimps.
There is no indication that negative (threatening) words and positive (rewarding) words are processed on different sides of the brain, but emotional words in general seem to be preferentially processed over neutral words.
The more strongly “handed” you are, the smaller that part of your brain, expecially if you’re male:. “. . .Among consistent-handed males, callosal area was negatively related to behavioral laterality. Among mixed-handed males and consistent-handed females, behavioral laterality was not predictive of callosal area. The most robust relationship was observed in mixed-handed females, in whom behavioral asymmetry was positively related to callosal area.”
Claudia Cantalupo; Joanne Oliver; Jarrod Smith; Talia Nir; Jared P. Taglialatela; and William D. Hopkins, “The chimpanzee brain shows human-like perisylvian asymmetries in white matter,” European Journal of Neuroscience Online 07.15.09, DOI: 10.1111/j.1460-9568.2009.06830.x
Welcome SE;Chiarello C;Towler S; Halderman LK; Otto R ;;Leonard CM; “Behavioral correlates of corpus callosum size: anatomical/behavioral relationships vary across sex/handedness groups,” Neuropsychologia. 2009 Oct;47(12):2427-35. Epub 2009 Apr 19. doi:10.1016/j.neuropsychologia.2009.04.008
Stavroula-Thaleia Kousta, David P. Vinson, and Gabriella Vigliocco, “Emotion words, regardless of polarity, have a processing advantage over neutral words,” Cognition, online 07.09.09
doi:10.1016/j.cognition.2009.06.007
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