Ca. Szabo et al., Amygdalar and hippocampal volumetry in control participants: Differences regarding handedness, AM J NEUROR, 22(7), 2001, pp. 1342-1345
Citations number
14
Categorie Soggetti
Radiology ,Nuclear Medicine & Imaging","Neurosciences & Behavoir
BACKGROUND AND PURPOSE: Amygdalar and hippocampal volume measurements indic
ate a right-greater-than-left asymmetry for right-handed normal participant
s in most studies. The purpose of this study was to compare amygdalar and h
ippocampal volume ratios between right- and left-handed participants.
METHODS: Amygdalar and hippocampal volume measurements were performed in 34
(20 right-handed and 14 left-handed) normal participants. All participants
completed a 10-item handedness questionnaire. The MR imaging sequence was
a 3D TI-weighted gradient-echo acquisition of the whole brain (24/6 [TR/TE]
; flip angle, 25 degrees). MR images were spatially normalized, and volumes
were painted with a 1.0-mm(3) resolution cursor on an SGI workstation.
RESULTS: In right-handed participants, the amygdala and hippocampus (P < .0
01 for both) were significantly larger on the right side than on the left.
The left-handed group did not show a significant difference between right-
and left-sided structures. Right-to-left volume ratios differed significant
ly between right- and left-handed participants for both amygdalar (P < .02)
and hippocampal (P < .01) structures. Gender did not affect right-to-left
amygdalar and hippocampal volume ratios in right- or left-handed participan
ts.
CONCLUSION: Handedness, but not gender, seems to affect right-to-left amygd
alar and hippocampal volume ratios.