Trying to compose even a single sentence can have the same effect, as we try to juggle grammatical and syntactical alternatives plus all the possibilities of tone, nuance, and rhythm even a simple sentence offers. Composing, then, is a cognitive activity thatconstantly threatens to overload short-term memory.
Linda Flower, Writer-Based Prose: A Cognitive Basis for Problems in Writing
cognition, cognitive-functioning, writing, writing-advice, writing-process