that aren't essential for housing

与人格同一性
the personality,

无关的部分一样
we might ask ourselves,

我们或许会问自己
"Do we need all of the brain to house the personality?"

"我们需要整个大脑来保存人格吗"
Research suggests

研究表明
that there's a fair bit of redundancy in the brain.

大脑中有不少冗余的部分
You can lose portions of the brain

你可以失去大脑的某些部分
and still have a perfectly functioning,

而依然运作完好
P-functioning person.

而且还是个功能健全的人
Some of you may know that there have been experiments in which,

你们或许有人知道曾经在有些实验中
for one reason or the other,

因为各种原因
the two halves of the brain have been separated.

大脑的两个半球被分开过