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Quote: Several studies have demonstrated global and regional brain sexual structural dimorphisms, in both normal children and adults (Witelsen and Kigar, 1992; Dreisen and Raz, 1995; Schlaepfer et al., 1995; Raz et al., 1995, 1997; Reiss et al., 1996; Giedd et al., 1997; Kennedy et al., 1998). These studies indicate the presence of sex-associated differences in cerebral development and organization, processes most likely beginning during fetal development [reviewed by Marsh and Casper (Marsh and Casper, 1998)]. Of note, Schlaepfer et al., using 5 mm MRI sections and approximations to cortical regions of interest, demonstrated that in addition to women having significantly smaller brains compared to men, regional brain sex differences also existed. However, total IPL gray matter percentages were not significantly different between men and women (Schlaepfer et al., 1995). While our study was conducted in an exceptionally well-matched sample population and utilized a highly reliable measurement method, the lack of accompanying detailed neuropsychological data makes direct comparison between brain findings and cognitive data speculative. Other possible methodological deficiencies of this study include: (i) lack of IPL white matter measurements, (ii) using right-handed subjects only and (iii) raters not being blind to hemisphere being measured. As there are no precise white matter boundaries for the IPL, as well as other cortical structures, we are unable as yet to develop reliable measurement techniques for the white matter. As for the issue of handedness, many asymmetrical brain measures, e.g. planum temporale and radius of gyration, have correlated with handedness (Steinmetz et al., 1991; Bullmore et al., 1995). Thus, it is possible that left-handed individuals show variants of the pattern we demonstrated. Whereas raters were blind to subject gender, the current imaging software does not allow for techniques such as counterbalanced mirroring which would blind raters to hemisphere, and thus experimenter bias may conceivably be a factor in these measures. As described previously, men tend to outperform women on tasks of visuospatial processing, a function subserved by the IPL, particularly the left side. Given the finding of larger left IPL volume in males compared to females, this study provides a possible structural brain basis for such sex-based cognitive differences. In addition, this cross-sectional study only attempts to describe male–female structural differences in the IPL, and does not permit making conclusions as to male–female brain developmental differences. Future studies, e.g. functional neuroimaging studies, assessing activation during cognitive tests specific to parietal regions, as well as longitudinal studies, with an emphasis on sex differences, lateralization and development, in normal states would be useful

وديل برضهم وهابية !!!!!

الفروقات حقيقة علمية ، لذا تجد النساء اكثر اداءا في المهام التي تتماشى مع تكوينها الدماغي كعمل المهام المتعددة في آن واحد من الرجال فتجدها تتحدث في الهاتف وتعمل بيدها وتراقب طفلها في آن واحد multi task

بينما الرجل ضعيف في هذه الناحية ومن باب آخر تجد المراة عاطفية والرجل اقدر على المواقف الصلبة وهكذا فالفروقات تكاملية وفي الجملة الرجال قوامون على النساء كما قال تعالى ولذا لم يبعث إمراة نبيا ولا رسولا بل حصر ذلك في جنس الرجال على عمر البشرية فالله اعلم حيث يجعل رسالته ، وكما قال وليس الذكر كالأنثى ، فتأملوا !!!