Missing Parts of the Brain

There is a woman who does not have a cerebellum. The cerebellum is called the "small brain" because of the high density and importance of it. Normally people who lack a cerebellum have very severe speech and movement problems, but this woman has minimal problems because her brain has compensated.
Broca's area is part of the frontal cortex. It is responsible for language, both comprehension and formation. When a person has a damaged Broca's Cortex they might have problems in their speech, but will still be able to speak. The sentences they form are not correct in grammar, but contain the essential information. Stuttering is associated with this area.