https://www.pisavisionlab.org Research centre dedicated to frontier, interdisciplinary research of human perception Fri, 24 Jun 2022 09:59:47 +0000 en-US hourly 1 https://wordpress.org/?v=6.4.13 https://www.pisavisionlab.org/2022/01/31/normal-retinotopy-in-primary-visual-cortex-in-a-congenital-complete-unilateral-lesion-of-lateral-geniculate-nucleus-in-human-a-case-study/ Mon, 31 Jan 2022 14:38:00 +0000 https://www.pisavisionlab.org/?p=4062 International Journal of Molecular Sciences, 23(3) Impairment of the geniculostriate pathway results in scotomas in the corresponding part of the visual field. Here, we present a case of patient IB with left eye microphthalmia and with lesions in most of the left geniculostriate pathway, including the Lateral Geniculate Nucleus (LGN). Despite the severe lesions, the patient has a very narrow scotoma in the peripheral part of the lower-right-hemifield only (beyond 15° of eccentricity) and complete visual field representation in the primary visual cortex. Population receptive field mapping (pRF) of the patient’s visual field reveals orderly eccentricity maps together with contralateral activation in both hemispheres. With diffusion tractography, we revealed connections between superior colliculus (SC) and cortical structures in the hemisphere affected by the lesions, which could mediate the retinotopic reorganization at the cortical level. Our results indicate an astonishing case for the flexibility of the developing retinotopic maps where the contralateral thalamus receives fibers from both the nasal and temporal retinae. Akshata Bhat, Jan W. Kurzawski, Giovanni Anobile, Francesca Tinelli, Laura Biagi, Maria Concetta Morrone https://www.pisavisionlab.org/2022/01/31/normal-retinotopy-in-primary-visual-cortex-in-a-congenital-complete-unilateral-lesion-of-lateral-geniculate-nucleus-in-human-a-case-study/ijms-23-01055/https://doi.org/10.3390/ijms23031055 https://www.pisavisionlab.org/2022/02/07/auditory-time-thresholds-in-the-range-of-milliseconds-but-not-seconds-are-impaired-in-adhd-2/ Mon, 07 Feb 2022 14:40:39 +0000 https://www.pisavisionlab.org/?p=4095 Scientific Reports, 12(1), 1352 The literature on time perception in individuals with ADHD is extensive but inconsistent, probably reflecting the use of different tasks and performances indexes. A sample of 40 children/adolescents (20 with ADHD, 20 neurotypical) was engaged in two identical psychophysical tasks measuring auditory time thresholds in the milliseconds (0.25–1 s) and seconds (0.75–3 s) ranges. Results showed a severe impairment in ADHD for milliseconds thresholds (Log10BF = 1.9). The deficit remained strong even when non-verbal IQ was regressed out and correlation with age suggests a developmental delay. In the seconds range, thresholds were indistinguishable between the two groups (Log10BF = − 0.5) and not correlated with milliseconds thresholds. Our results largely confirm previous evidence suggesting partially separate mechanisms for time perception in the ranges of milliseconds and seconds. Moreover, since the evidence suggests that time perception of milliseconds stimuli might load relatively less on cognitive control and working memory, compared to longer durations, the current results are consistent with a pure timing deficit in individuals with ADHD. Anobile, G., Bartoli, M., Pfanner, C., Masi, G., Cioni, G., & Tinelli, F. https://www.pisavisionlab.org/2022/02/07/auditory-time-thresholds-in-the-range-of-milliseconds-but-not-seconds-are-impaired-in-adhd-2/s41598-022-05425-2/https://doi.org/10.1038/s41598-022-05425-2 https://www.pisavisionlab.org/2022/06/24/does-more-imply-better-vision%ef%bf%bc/ Fri, 24 Jun 2022 09:25:36 +0000 https://www.pisavisionlab.org/?p=4225 Cognitive Neuropsychology, 2022; 1-3 Elisa Castaldi, Guido Marco Cicchini, Francesca Tinelli,Maria Concetta Morrone https://www.pisavisionlab.org/2022/06/24/does-more-imply-better-vision%ef%bf%bc/02643294-2022-2052715/https://doi.org/10.1080/02643294.2022.2052715