a question regarding a paraphrase
The passage below is from ‘the Blank Slate’ by Steven Pinker.
http://evolbiol.ru/blankslate/blankslate.htmThe most famous evidence for extreme plasticity in humans had been the ability of some children to grow up relatively normal even with an entire hemisphere surgically removed in infancy. ? even when an entire hemisphere surgically
had been removed in infancy
? even when an entire hemisphere surgically
was removed in infancy
I paraphrased the underlined part in two versions.
One has a past-participle tense, and the other just a past-tense.
Question 1:
Are both possible?
Question 2:
Even though they are possible, isn't there any difference in meaning?
Regards.