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Mózg w mocy hormonów

100%
Grabowska A.
|
EN
Summary This review article describes the organizational effects of sex hormones on the developing brain and their activational role in regulation of brain function in adulthood. Gender differences in behavior and mental function depend on the action of sex hormones. Clinical studies showing the consequences of hormonal abnormalities, the effects of hormonal treatment as well as the effects of natural fluctuations in the circulating sex hormones are presented. All these data lead to the coherent view that hormones not only control reproductive behavior but also play a key role in regulation of various cognitive functions. Findings of basic neuroscience help to elucidate the mechanisms of hormones action at the level of neurochemistry or fine-grained neuroanatomy of synaptic connections in the brain areas known to be critically involved in learning and memory.
2
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To be a woman, to be a man - introduction

63%
Grabowska A., Nowicka A.
Kosmos
|
2003
|
vol. 52
|
issue 1
3-4
3
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Być kobietą, być mężczyzną - wstęp

63%
Grabowska A., Nowicka A.
Kosmos
|
2003
|
vol. 52
|
issue 1
1-2
4
Content available remote

Transsexualism and sex-related differences in hemispheric asymmetry

51%
Herman A., Grabowska A., Dulko S.
Acta Neurobiologiae Experimentalis
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1993
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vol. 53
|
issue 1
269-274
EN
Sex differenes in human brain lateralization are documented by studies on normal subjects, patients with the unilateral brain damage, and individuals with atypical level of hormones. However, there is no agreement as to the specific role of gender in the development of hemispheric asymmetry. This experiment was designed to examine whether gender identity plays an important role in the formation of brain lateralization, as some recent data seem to suggest. A group of subjects showing gender dysphoria transsexuals and two groups of control male and female subjects were presented with verbal and visual-spatial tasks. Results show that neither biological sex nor gender identity are sufficient factors to determine the pattern of hemispheric asymmetry.
5
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Hemispheric asymmetry in stimulus size evaluation

51%
Szatkowska I., Grabowska A., Nowicka A.
Acta Neurobiologiae Experimentalis
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1993
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vol. 53
|
issue 1
257-262
EN
In the present study a possible hemispheric asymmetry in size evaluation was tested. Subjects were presented with geometrical Vanderplas type figures of various sizes and shapes. The stimuli were exposed in paris, for 100 ms, one after another. The subject's task was to decide (by pressing one of three buttons) whether the second stimulus was the same as, smaller or bigger than the first one. The first stimulus in each pair was exposed unilaterally (randomly in the left or right visual field), and the second in the centre of the screen. Three different interstimulus intervals (ISI) were used: 50 ms, 500 ms, and 2,000 ms. The results showed shorter reaction times for left visual field presentation than for right visual field presentation at the 50 ms and 500 ms interstimulus interval. No laterality effect occured at the 2,000 ms ISI. The results indicate a right hemisphere predominance in stimulus size evaluation. Moreover, the suggest that hemispheric asymmetry is not a stable feature of the brain but is a synamic process that may change in the course of information processing.
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