A University of South Carolina study suggests that pronouns help keep the brain’s complex circuitry and limited memory system from being overloaded.

“The brain lit up with activity when proper names were used, including areas that are not associated with language,” Almor said. “We saw considerable activity in areas of the parietal lobe that involve spatial processing that was absent when pronouns were used.” . . .

Pronouns, while faulty for their potential ambiguity, don’t cause the same disruptions in the brain that proper names do when used in the right context. In fact, they allow the brain to move easily from one thought or sentence to another. This seamless transition allows a person to digest more fully the meaning or intent of the thought being conveyed without the neural circuitry interference that proper names cause, said Almor.