Board Thread:Theories and Speculation/@comment-43776375-20190921063938/@comment-4912646-20190927020226

The whole muscle memory thing is something fans came up with to explain Kabuto's comments after Nagato's defeat, so it may or may not be correct. Kabuto doesn't actually say why Nagato still lacks mobility, just that he does. An alternate explanation could be that the Eight-Tails' chakra only healed the damage done by the Gedō Mazō sucking his life force, and not the damage caused by Hanzō's attack.