Answer:
his personality
Step-by-step explanation:
Aspects of his personality were greatly affected. Before the accident, he was highly regarded as a devoted, caring, hard-working man. Afterwards, he was vulgar, nasty and irresponsible. His former employer refused to hire him after the accident due to the drastic change in his personality.
The frontal lobe is responsible for aspects of the human personality, along with decision making/reasoning, emotion, and memory formation.