Reorganization of Visual Cortical Maps after Focal Ischemic Lesions
Reorganization of Visual Cortical Maps after Focal Ischemic Lesions
复制标题
局灶性缺血性病变后视觉皮层图的重组
DOI:
--
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发表时间:
2003
影响因子:
6.3
通讯作者:
F. Sengpiel
中科院分区:
文献类型:
--
作者:
A. Zepeda;L. Vaca;C. Arias;F. Sengpiel
Plasticity after central lesions may result in the reorganization of cortical representations of the sensory input. Visual cortex reorganization has been extensively studied after peripheral (retinal) lesions, but focal cortical lesions have received less attention. In this study, we investigated the organization of retinotopic and orientation preference maps at different time points after a focal ischemic lesion in the primary visual cortex (V1). We induced a focal photochemical lesion in V1 of kittens and assessed, through optical imaging of intrinsic signals, the functional cortical layout immediately afterwards and at 4, 13, 33, and 40 days after lesion. We analyzed histologic sections and evaluated temporal changes of functional maps. Histological analysis showed a clear lesion at all time points, which shrank over time. Imaging results showed that the retinotopic and orientation preference maps reorganize to some extent after the lesion. Near the lesion, the cortical retinotopic representation of one degree of visual space expands over time, while at the same time the area of some orientation domains also increases. These results show that different cortical representations can reorganize after a lesion process and suggest a mechanism through which filling-in of a cortical scotoma can occur in cortically damaged patients.
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影响因子:
56.9
作者:
Jones, EG;Pons, TP
通讯作者:
Pons, TP
DOI:
10.1073/pnas.87.3.1134
发表时间:
1990-02
影响因子:
11.1
作者:
G. Orban;E. Vandenbussche;J. Sprague;P. De Weerd
通讯作者:
G. Orban;E. Vandenbussche;J. Sprague;P. De Weerd
影响因子:
8.3
作者:
STROEMER, RP;KENT, TA;HULSEBOSCH, CE
通讯作者:
HULSEBOSCH, CE
影响因子:
8.3
作者:
Li, Y;Jiang, N;Chopp, M
通讯作者:
Chopp, M