[Eric in the Ozarks]

Not likely.

[albie]

Portion of brain that controls common sense.

Answer:
If you mean by “common sense” the way you appreciate and/or interpret things or situations, then it is most certainly the Cerebrum...

Explanation:
What you describe is a cognitive process, and that is done in the Cerebrum (more specifically the Frontal Lobe(s))

So unless this fall caused a frontal lobotomy...