Deficits in tactile learning in a mouse model of fragile X syndrome.
Deficits in tactile learning in a mouse model of fragile X syndrome.
复制标题
易碎X综合征的鼠标模型中的触觉学习缺陷。
DOI:
10.1371/journal.pone.0109116
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
McGee AW
中科院分区:
文献类型:
--
作者:
Arnett MT;Herman DH;McGee AW
The fragile X mental retardation 1 mutant mouse (Fmr1 KO) recapitulates several of the neurologic deficits associated with Fragile X syndrome (FXS). As tactile hypersensitivity is a hallmark of FXS, we examined the sensory representation of individual whiskers in somatosensory barrel cortex of Fmr1 KO and wild-type (WT) mice and compared their performance in a whisker-dependent learning paradigm, the gap cross assay. Fmr1 KO mice exhibited elevated responses to stimulation of individual whiskers as measured by optical imaging of intrinsic signals. In the gap cross task, initial performance of Fmr1 KO mice was indistinguishable from WT controls. However, while WT mice improved significantly with experience at all gap distances, Fmr1 KO mice displayed significant and specific deficits in improvement at longer distances which rely solely on tactile information from whiskers. Thus, Fmr1 KO mice possess altered cortical responses to sensory input that correlates with a deficit in tactile learning.
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