关于头动文章A comprehensive assessment of regional variation in the impact of head micromovements on functional connectomics的问题

Submitted by liufeng on

严师兄:

好!

 

读完文章A comprehensive assessment of regional variation in the impact of head micromovements on functional connectomics,受益匪浅。

对于文章中的建议,不太理解。还想进一步请教下。

建议1:• Individual-level correction with the Friston-24 model is recommended. 即:在个体水平建议使用Friston-24 model进行头动参数回归。

建议2:• Additionally, group-level correction for mean FD is recommended, and removes the need for scrubbing. 即:在组水平将mean FD设置为回归子,后面是什么意思?不需要做scrubbing?是吗?

建议3:• If group-level correction for mean FD is contraindicated or not practical, then individual-level correction with scrubbing is recommended for PCC-FC, VMHC
and ReHo (not ALFFa, fALFF, DCb). mean FD is contraindicated or not practical,这个不太理解,什么时候mean FD会是 contraindicated or not practical呢?后面的意思是如果mean FD不作为回归子,那么在个体水平分析的时候要做scrubbing。
 
总结问题:
1. removes the need for scrubbing什么意思
2. If group-level correction for mean FD is contraindicated or not practical如何理解
 
谢谢!

YAN Chao-Gan

Thu, 12/17/2015 - 14:12

Hi,

1. 我们认为,在个体水平上做Friston 24,在组水平上用mean FD做协变量是一种相对不错的方式。再做scrubbing的必要性不是很大(remove the need)。

2. Not practical的情况:比如ALFF和fALFF,scrubbing截断了时间上的连续性,做FFT就不合适了。另外,如果被试数很少,比如说十个,mean FD做协变量就不太合适。Contraindicated: 比如说DC, 做了scrubbing,反而头动的影响更大。

谢谢!

超赣