quality:corruption, structural:summarization
Physiology of babbling

The human mouth moves in distinct ways during speech production. When producing each individual sound out loud, humans use different parts of their mouths, as well as different methods to produce particular sounds. During the beginnings of babbling, infants tend to have greater mouth openings on the right side. This finding suggests that babbling is controlled by the left hemisphere of the brain. The larynx, or voicebox, is originally high in the throat which allows the baby to continue to breathe while swallowing. It descends during the first year of life, allowing the pharynx to develop and facilitates the production of adult-like speech sounds.