The left lobe of your brain is the part of the brain you use to do math.
Cerebral
If we are a righty then we generally use the right part of our brain scarcely
left
1
brain
It affects all of your brain because you use all of your brain to think.
No you don't use your whole brain. Only part of your brain is ever used.
Frontal Lobe
Both parts.
The name of Neptune's horse is Hippocampos. But the part of the brain you are thinking of must be the hypothalimous.
The autonomic nervous system.