精确的功能神经成像揭示了婴儿个别特定的听觉反应

Hearing begins developing before birth. Fetuses respond to sounds in the womb through changes in brain activity, heart rate, and body movements, showing sensitivity to auditory stimulation. After birth, hearing continues to develop rapidly, supporting language learning and environmental awareness.Auditory Acuity and Sound LocalizationAuditory acuity refers to the ability to detect sounds. Newborns are especially responsive to human voices and can detect many speech sounds, although their...

Communication in infancy begins with crying, a reflexive and adaptive behavior that signals needs such as hunger, discomfort, or anger. Variations in pitch, pattern, and intensity help caregivers interpret these states, making crying an important survival mechanism during the neonatal period.Emergence of VocalizationsBy about six weeks, infants begin cooing, producing vowel-like sounds, squeals, and gurgles that often indicate contentment. Between six and ten months, cooing develops into...

Infants are born with a predisposition to perceive and categorize basic linguistic sounds. Early in development, they can discriminate sounds from many languages and detect differences in rhythm and pattern. This sensitivity may begin before birth. Newborns exposed to two languages prenatally can recognize both, indicating that fetal language exposure influences later auditory discrimination.Recognition of Familiar SoundsBy five months, infants show preferences for familiar auditory stimuli,...