人类/灵长类早期视觉成分的onset time

人类

头皮电位

结论出自Exp Brain Res(2002) 142:139-150 (http://cogneuro-nki.rfmh.org/Docs/john_pubs/Foxe-Simpson-2002-ExpBrainRes.pdf)

最早的视觉皮质应答, V1, onset time 56 ms;

最早 dorsal visual processing streams, parietal vusual areas, onset time 70ms

最早 dorsal visual processing streams, left dorsolateral frontal cortex, onset time 80ms

最早 ventral visual processing streams, right temporal cortex, onset time 80 ms

以下结论出自 Neuroreport. 1997 Jul 28;8(11):2419-22

最早的人类视觉诱发电位：onset before 30 ms and with a peak around 45 ms, located in the vicinity of V5.  This early component was independent of a second activity, which started around 50 ms and peaked around 70 ms, and was located within the striate cortex (V1).

 硬膜下电位 subdural

数据出于Epilepsia 1997,38(5) 600-10

subjects : epilepsy patients

1/ Peak latency 70 ms; negative potentials; location: lingual gyrus (C1)

2/ Peak latency 80 ms; negative potentials; location: Superior to the calcarine fissure  (C1)

3/ Onset time 90 ms; positive potentials; location: lateral occipital lobe  (P1)

灵长类

结论出自Cereb. Cortex 8:575-592

工具:multicontact linear-array electrode

研究对象 monkey

The mean onset latencies of 20.3 ms in area MT, 25.8 ms in IP, 26.3 ms in area V1, 27.4 ms in STP, 36.1 ms in V2, 32.3 ms in V4, and 49.2 ms in IT.

［此帖子已被 zhixl 在 2005-11-22 17:08:08 编辑过］

上文的研究人员同时发现早期的视觉成分C1的初期部分C1e（C1的前10-15ms）源自V1。而C1的其后部分则是多源的，可能源自很多不同的视觉皮质（包括V1）。

1999年法国学者在同时提示av的情况下在v皮质发现了更早的感觉as early as 40 ms poststimulus

去年我在同时提示av的情况下在frontal cortex发现了 onset time 65ms 的感觉应答

Do you know the earliest onset time respondent to “a” input alone?fficeffice" />

引用：

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原文由 thinker_jeff 发表于 2005-11-21 22:21:22 :

Do you know the earliest onset time respondent to “a” input alone?fficeffice" />

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没看懂你的问题。

你是不是想让我确认一下“那个在同时提示av条件下在v皮质测量到的活动只属于对a或v中的一个做的应答”？

这个应答是对a和v同时做出的，属于auditory-visual integration component

Sorry for the unclear question I asked.fficeffice" />

If I’m interpreting your poster right, the earliest onset time (40 ms) respondent to “av” input is faster than the onset time (56 ms) respondent to “v” input. So I guess the onset time respondent to “a” input should be not slower than (40 ms). If my guessing is wrong, I will be very interested on the reason.

引用：

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原文由 thinker_jeff 发表于 2005-11-22 0:03:53 :

Sorry for the unclear question I asked.fficeffice" />

If I’m interpreting your poster right, the earliest onset time (40 ms) respondent to “av” input is faster than the onset time (56 ms) respondent to “v” input. So I guess the onset time respondent to “a” input should be not slower than (40 ms). If my guessing is wrong, I will be very interested on the reason.

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既然是integration就一定是视觉和听觉的投射都接受到了才能发生.

那么为什么单独测量视觉,潜伏期更短呢?单独测量听觉,根本观察不到呢?有人假设在40ms时视觉和听觉的投射都存在,只是都是阈值下,记录不到而已.而integration使得AV>(A+V),所以integration条件下就能记录到了.

引用：

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原文由 zhixl 发表于 2005-11-22 16:58:01 :

既然是integration就一定是视觉和听觉的投射都接受到了才能发生.

有人假设在40ms时视觉和听觉的投射都存在,只是都是阈值下,记录不到而已.而integration使得AV>(A+V),所以integration条件下就能记录到了.

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A reasonable explanation. fficeffice" />