When a question is migrated it is locked.
This is the migrated post:
Could this be a key insight in understanding the etiologies of neurodegenerative disorders?
All edits should be made there.
If you look at the revision history of the migrated post:
It was migrated then locked. All edits should be made to the new question.
Unlocking the post
If you have a justifiable reason that a post should be unlocked, you should flag it for moderator attention using the "flag" link underneath the post. Select the "other" flag reason, and provide a detailed explanation of your rationale in the textbox provided.
A moderator will review your flag, and if they agree with your arguments, unlock the post.