提高人口受感场测量的可靠性和准确性,使用对数曲线的刺激
Kelly Chang1, Ione Fine1, Geoffrey M Boynton1
1Department of Psychology, University of Washington Seattle, Washington.
bioRxiv : the preprint server for biology
|June 25, 2024
概括
一种新的日志条刺激提高了人体视觉皮层中的受体场 (pRF) 映射. 这种方法提供了更可靠的pRF大小和位置估计,特别是在fovea附近.
科学领域:
- 神经科学是一个神经科学.
- 视觉神经科学是一种神经科学.
- 功能性磁共振成像 (fMRI) 是一种功能性磁共振成像技术.
背景情况:
- 人口受体场 (pRF) 方法对于理解使用fMRI的人类视觉皮层组织至关重要.
- 现有的pRF估计技术可能会产生偏见和不可靠的结果,特别是在早期视觉区域的形表示.
研究的目的:
- 引入和评估"日志条"刺激,以实现更准确的pRF映射.
- 为了将日志条刺激与传统的移动条刺激的可靠性进行比较,用于pRF估计.
主要方法:
- 使用了对数曲线的"日志条"刺激,旨在优化沿视野偏心度的采样.
- 应用fMRI来测量视网膜上皮层中的血氧水平依赖 (BOLD) 信号.
- 将从日志棒刺激中获得的pRF大小和位置估计与从传统移动棒刺激中获得的pRF大小和位置估计进行比较.
主要成果:
- 与移动棒刺激相比,日志棒刺激在估计pRF大小和位置方面表现出更高的可靠性.
- 记录条刺激在识别foveal表征中的pRF方面更有效.
- 使用日志条刺激的估计pRF大小在焦点附近较小,与理论预测一致.
结论:
- 记录条刺激为人类视觉皮层中人口受感场映射提供了更强大,更准确的方法.
- 这种改进的技术提高了基于fMRI的视觉皮层功能调查的可靠性,特别是在具有挑战性的叶区域.
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There are two methods of testing a claim about a population proportion: (1) Using the sample proportion from the data where a binomial distribution is approximated to the normal distribution and (2) Using the binomial probabilities calculated from the data.
The first method uses normal distribution as an approximation to the binomial distribution. The requirements are as follows: sample size is large...