visual deprivation
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2021 ◽  
Author(s):  
Dominika Radziun ◽  
Laura Crucianelli ◽  
H. Henrik Ehrsson

In the present study, we investigated the effect of short-term visual deprivation on discriminative touch, cardiac interoception, and thermosensation by asking 64 healthy volunteers to perform four behavioral tasks. The experimental group contained 32 subjects who were blindfolded and kept in complete darkness for 110 minutes, while the control group consisted of 32 volunteers who were not blindfolded but were otherwise kept under identical experimental conditions. Both groups performed the required tasks three times: before and directly after deprivation (or control) and after an additional washout period of 40 minutes, in which all participants were exposed to normal light conditions. Our results showed that short-term visual deprivation had no effect on any of the senses tested. This finding suggests that short-term visual deprivation does not modulate basic bodily senses and extends this principle beyond tactile processing to the interoceptive modalities of cardiac and thermal sensations.


2021 ◽  
Vol 8 ◽  
Author(s):  
Yixuan Feng ◽  
Olivier Collignon ◽  
Daphne Maurer ◽  
Ke Yao ◽  
Xiaoqing Gao

Patients treated for bilateral congenital cataracts provide a unique model to test the role of early visual input in shaping the development of the human cortex. Previous studies showed that brief early visual deprivation triggers long-lasting changes in the human visual cortex. However, it remains unknown if such changes interact with the development of other parts of the cortex. With high-resolution structural and resting-state fMRI images, we found changes in cortical thickness within, but not limited to, the visual cortex in adult patients, who experienced transient visual deprivation early in life as a result of congenital cataracts. Importantly, the covariation of cortical thickness across regions was also altered in the patients. The areas with altered cortical thickness in patients also showed differences in functional connectivity between patients and normally sighted controls. Together, the current findings suggest an impact of early visual deprivation on the interactive development of the human cortex.


2021 ◽  
Author(s):  
Walter Setti ◽  
Luigi F. Cuturi ◽  
Isaac Engel ◽  
Lorenzo Picinali ◽  
Monica Gori

2021 ◽  
Vol 12 ◽  
Author(s):  
Qian Zhang ◽  
Lixia Zhang ◽  
Wei He ◽  
Xuemei Zheng ◽  
Zhengrui Zhao ◽  
...  

We aimed to explore whether motor function and activities of daily life (ADL) could be improved with the application of visual deprivation in two patients with Pusher syndrome complicated by hemispatial neglect after right basal ganglia stroke. We assessed two stroke patients suffering from severe motor disturbances, both tilting heavily to the left, with diagnoses of Pusher syndrome and left hemispatial neglect. Vision in the left eye was deprived using patches during clinical rehabilitation. Motor function promotion was confirmed using the Burke Lateropulsion Scale (BLS), Fugl–Meyer Balance Scale (FMBS), and Holden grade (HG), while the Barthel index (BI) assessed ADL immediately and 1 week after intervention. Both patients regained standing balance immediately using visual deprivation, as well as walking ability, although both scored 0 on the FMBS and HG. After 1 week of treatment, one patient increased to 11 and 3 on the FMBS and HG, respectively, while the BLS score decreased from 12 to 2, and the ADL increased from 23 to 70. The other patient demonstrated increases to 10 and 3 on the FMBS and HG, respectively, with the BLS decreasing from 13 to 3, and the ADL increasing from 25 to 60. Therefore, in the rehabilitation treatment of Pusher syndrome complicated by hemispatial neglect due to basal ganglia stroke, visual deprivation can significantly improve motor function and shorten the treatment course.


2021 ◽  
Vol 186 ◽  
pp. 80-86
Author(s):  
Jie Ye ◽  
Priti Gupta ◽  
Pragya Shah ◽  
Kashish Tiwari ◽  
Tapan Gandhi ◽  
...  

2021 ◽  
Author(s):  
Irene Senna ◽  
Elena Andres ◽  
Ayelet McKyton ◽  
Itay Ben-Zion ◽  
Ehud Zohary ◽  
...  

2021 ◽  
pp. 107385842110376
Author(s):  
Ji Won Bang ◽  
Giles Hamilton-Fletcher ◽  
Kevin C. Chan

The visual system retains profound plastic potential in adulthood. In the current review, we summarize the evidence of preserved plasticity in the adult visual system during visual perceptual learning as well as both monocular and binocular visual deprivation. In each condition, we discuss how such evidence reflects two major cellular mechanisms of plasticity: Hebbian and homeostatic processes. We focus on how these two mechanisms work together to shape plasticity in the visual system. In addition, we discuss how these two mechanisms could be further revealed in future studies investigating cross-modal plasticity in the visual system.


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