American English takes a slightly different approach to the agreement of verbs with collective nouns. There is a very strong preference for the use of singular verbs with such nouns, so in American English you are much more likely to see, for example:
By Dr Ananya Mandal, MD. The human brain is divided into two hemispheres. The left hemisphere is the logical brain and is involved in language and analysis and the right hemisphere is the creative brain, involved in daydreaming and imagination. The left hemisphere controls the right side of the body while the right hemisphere controls the left side.
The left hemisphere is thought to control language, math and logic, while the right hemisphere is responsible for spatial abilities, visual imagery, music and your ability to recognize faces. The left hemisphere of your brain also controls the movement on the right side of your body. The left hemisphere of the brain contains parts of the parietal lobe, temporal lobe and the occipital lobe, which make up your language control center.