Sulcal morphology and volume of Broca's area linked to handedness and sex  

Oleh:

Powell, Joanne L. ; Kemp, Graham J. ; Roberts, Neil ; García-Finaña, Marta

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Brain and Language (Full Text) vol. 121 no. 3 (2012), page 206-218.
Topik: Pars opercularis; Pars triangularis; Broca’s area; Handedness; Sex; Asymmetry; Stereology; Inferior frontal sulcus; Diagonal sulcus
Fulltext: 121_03_Powell.pdf (575.91KB)

Isi artikel

We investigated the effect of handedness and sex on: (i) sulcal contours defining PO and PTR and (ii) volume estimates of PO and PTR subfields in 40 left- and 42 right-handers. Results show an effect of handedness on discontinuity of the inferior frontal sulcus (IFS: P < 0.01). Discontinuity of IFS was observed in: 43% left- and 62% right hemispheres in right-handers and in 65% left- and 48% right-hemispheres in lefthanders. PO volume asymmetry was rightward in left-handed males (P = 0.007) and females (P = 0.02), showed a leftward trend in right-handed males (P = 0.06), and was non-asymmetrical in right-handed females (P = 0.96, i.e. left- and right-hemisphere PO volumes did not differ significantly). PO volume asymmetry in males differed significantly between handedness groups (P = 0.001). Findings indicate a high degree of variability in the sulcal contours of PO and PTR and volume asymmetry of PO: the factors sex and handedness can explain some of this variability.

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