The part of the brain that helps us to write is the cerebellum.
There isn't a simple answer. If you are writing mathematical equations and proofs, it is almost totally left brain. If you are writing poetry, it is about 50/50.
Frontal lobe
which part of sheep's brain is responsible for locating its young
The cerebrum or cortex is the largest part of human brain associated with higher brain functions like thought and actions, plays the vital role in the ability to read and write.
The brain
No single part of the brain is responsible for consciousness. The brainstem, diencephalon, and cerebral hemispheres are all involved in consciousness.
the prefrontal part
you
Hypothalamus
the brain is responsible for higher level thinking, such as planning a trip. The rest of the nervous system is mainly for receiving and transmitting signals
the cerebellum is responsible for balacing
The part of the brain that matures late is the front part. This part of the brain is responsible for organizing thoughts, the interpretation of emotions and assuming responsibility.
the reticular formation
The topmost portion.