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

Joanne L Powell; Graham J Kemp; Neil Roberts; Marta Garcia-Finana

doi:10.1016/j.bandl.2012.03.003

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

Joanne L Powell, Graham J Kemp, Neil Roberts, Marta Garcia-Finana

Psychology

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16 Citations (Scopus)

Abstract

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 left-handers. 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.

Original language	English
Pages (from-to)	206-218
Journal	Brain and Language
Volume	121
Issue number	3
DOIs	https://doi.org/10.1016/j.bandl.2012.03.003
Publication status	Published - 2012

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10.1016/j.bandl.2012.03.003

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@article{9c983ea0573f4ef4996be106bece73d5,

title = "Sulcal morphology and volume of Broca{\textquoteright}s area linked to handedness and sex",

abstract = "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 left-handers. 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.",

author = "Powell, {Joanne L} and Kemp, {Graham J} and Neil Roberts and Marta Garcia-Finana",

year = "2012",

doi = "10.1016/j.bandl.2012.03.003",

language = "English",

volume = "121",

pages = "206--218",

journal = "Brain and Language",

issn = "0093-934x",

publisher = "Elsevier",

number = "3",

}

TY - JOUR

T1 - Sulcal morphology and volume of Broca’s area linked to handedness and sex

AU - Powell, Joanne L

AU - Kemp, Graham J

AU - Roberts, Neil

AU - Garcia-Finana, Marta

PY - 2012

Y1 - 2012

N2 - 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 left-handers. 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.

AB - 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 left-handers. 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.

U2 - 10.1016/j.bandl.2012.03.003

DO - 10.1016/j.bandl.2012.03.003

M3 - Article (journal)

SN - 0093-934x

VL - 121

SP - 206

EP - 218

JO - Brain and Language

JF - Brain and Language

IS - 3

ER -

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

Abstract

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