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Screening of treatment targets for Alzheimer’s disease from the molecular mechanisms of impairment by β-amyloid aggregation and tau hyperphosphorylation

Behavioral assessments of the aversive quality of pain in animals

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Decline of selectivity of V1 neurons to visual stimulus spatial frequencies in old cats

Content Provider	Springer Nature Link
Author	Hua, Guo Peng Shi, Xia Ming Zhou, Jun Peng, Qing Song Hua, Tian Miao
Copyright Year	2011
Abstract	To examine whether the selectivity of visual cortical neurons to stimulus spatial frequencies would be affected by aging in cats.In vivo extracellular single-unit recording techniques were employed to record the tuning responses of V1 neurons to different stimulus spatial frequencies in old and young adult cats.Statistical analysis showed that the mean optimal spatial frequency of grating stimuli that evoked the maximal response of V1 neurons in old cats was significantly lower than that in young adult cats. Furthermore, the mean high cut-off spatial frequency of grating stimuli that evoked the half amplitude of the maximal response of V1 neurons in old cats was also significantly lower than that in young adult cats.These results are consistent with those reported in the V1 of old monkeys, suggesting that the age-related decline in the selectivity of visual cortical cells to spatial frequency could be generalized to all mammalian species and might contribute to visual acuity reduction in senescent individuals.探讨猫的初级视皮层(V1)细胞对视觉刺激空间频率的选择性是否受年龄影响。采用在体细胞外单细胞记录技术分别记录青、老年猫V1神经元对不同空间频率光栅刺激的调谐反应。数据统计分析结果显示, 诱导老年猫V1神经元出现最大诱发反应幅度的平均最优刺激空间频率(optimal spatial frequency, OSF)相较于青年猫的OSF 显著降低。此外, 老年猫V1 神经元达到半幅反应的平均高频截止空间频率(cut-off spatial frequency, CSF)也显著小于青年猫的CSF。该结果与在老年猴初级视皮层的研究报道一致, 表明年龄相关的视皮层细胞对刺激空间频率的选择性下降可能是哺乳动物中普遍存在的现象, 也可能是导致老年性视敏度下降的重要原因。
Starting Page	9
Ending Page	14
Page Count	6
File Format	PDF
ISSN	16737067
Journal	Neuroscience Bulletin
Volume Number	27
Issue Number	1
e-ISSN	19958218
Language	Chinese
Publisher	Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences
Publisher Date	2011-02-02
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	spatial frequency selectivity functional decline V1 neurons old cats Pain Medicine Neurology Anatomy Anesthesiology Human Physiology Neurosciences
Content Type	Text
Resource Type	Article
Subject	Neuroscience Physiology Medicine

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