کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
925360 | 921483 | 2013 | 10 صفحه PDF | دانلود رایگان |

Previous studies have shown that the strength of connectivity between regions can vary depending upon the cognitive demands of a task. In this study, the location of task-dependent connectivity from the primary visual cortex (V1) was examined in 43 children (ages 9–15) performing visual tasks; connectivity maxima were identified for a visual task requiring a linguistic (orthographic) judgment. Age, sex, and verbal IQ interacted to affect maxima location. Increases in age and verbal IQ produced similar shifts in maxima location; in girls, connectivity maxima shifted primarily laterally within the left temporal lobe, whereas the shift was primarily posterior within occipital cortex among boys. A composite map across all subjects shows an expansion in the area of connectivity with age. Results show that the location of visual/linguistic connectivity varies systematically during development, suggesting that both sex differences and developmental changes in V1 connectivity are related to linguistic function.
► Lexical task-dependent connectivity examined in ventral visual stream.
► Location of connectivity maxima varies systematically by age, sex and verbal IQ.
► Increases in age and verbal IQ produced similar shifts in maxima location.
► Lateral shift in temporal lobe for girls, posterior occipital shift for boys.
► Area of connectivity expands with age.
Journal: Brain and Language - Volume 124, Issue 2, February 2013, Pages 184–193