Definition for Phineas Gage
From Biology Forums Dictionary
Phineas P. Gage (1823 – 1860) was an American railroad construction foreman now remembered for his improbable survival of an accident in which a large iron rod was driven completely through his head, destroying much of his brain's left frontal lobe, and for that injury's reported effects on his personality and behavior – effects so profound that friends saw him as "no longer Gage".