are の主語（主部）がわかりません の意味は？
英文の和訳に力を貸してください。よろしくお願いいたします。
流れ：ADHDという病気に関する所説について説明が続いてきた文章。
直前：ｆMRIという検査はADHD患者と健常者間の数多くの違いを明らかにしてきた。
直後：説明なし（次の話題に移行）
分からない文章
Independent component analysis※ performed on resting-state fMRI data have revealed that individuals with the inattentive type of ADHD have significantly more independent components are required to describe the variance of this data.
※Independent component analysis：独立構成的分析 統計分析の一種
分からない点：areの文法的使われ方。主語（主部）はどれ？ components 「are」 required to describe the variance of this data. よろしくお願いします。
回答
Thank you very much!
And I am very suprised because the content of your advise is exactly the same with my analysis .
I have convinced that this sentence has something wrong mistake.
I am very glad to meet you and get an advice from you. I have studied English very hard to become a crinical counselor . So I might have anoter question. If you forgive , please teach me again.
thank you for your re-posting the source of the reference. above all I've surprised that you had found this question sentences out of such wordy papers. but even if I read again still the question remains unsolved. I'd think there mustn't be any mistakes in that part of the paper, but for me I can't find any solution without the thought(having an error, next 1 or 2).
:1.'are' may be 'being'.
:2.'which' might have been disappeared before 'are' (after 'component').
I'm sorry I can not make a help for you.
If you get some solution I'm looking forward to your posting it to this section.
Brain structure
In children with ADHD, there is a general reduction of volume in certain brain structures, with a proportionally greater decrease in the volume in the left-sided prefrontal cortex.The posterior parietal cortex also shows thinning in individuals with ADHD compared to controls. Other brain structures in the prefrontal-striatal-cerebellar and prefrontal-striatal-thalamic circuits have also been found to differ between people with and without ADHD.
The subcortical volumes of the accumbens, amygdala, caudate, hippocampus, and putamen appears smaller in individuals with ADHD compared with controls.[139] Structural MRI studies have also revealed differences in white matter, with marked differences in inter-hemispheric asymmetry between ADHD and typically developing youths
Functional MRI fMRI studies have revealed a number of differences between ADHD and control brains. Independent component analysis performed on resting-state fMRI data have revealed that individuals with the inattentive type of ADHD have significantly more independent components are required to describe the variance of this data.
the source
https://en.wikipedia.org/wiki/Attention_deficit_hyperactivity_disorder