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Certain advances in physiology influence psychiatric progress. Dr. Lind's monograph reports the finding of acoustically distinctive cry patterns associated with arousal states in infancy. This has great relevance for human behavior research.
Newborn Infant Cry, contains four papers about the study of cry and related upper respiratory actions conducted at the Karolinska Children's Hospital in Stockholm. The investigators treated cry as a specific "performance" of the newborn and correlated its audible, kinetic, and respiratory features. The first paper, written by Henry M. Truby, PhD, describes the acoustic analysis of rousal cries produced by 30 newborns after being pinched. Cries were collected with a laryngeal contact microphone and then analyzed sonagraphically and with a directwriting oscillograph. Simultaneous x-ray movies provided data about the motor activity of valved respiration. Three primary sorts of cry-sound were identified: (1) phonation, a simple, symmetrical, tonal "basic" cry which registers mild
Ostwald PF. Newborn Infant Cry (Supplement 163).. Arch Gen Psychiatry. 1966;15(4):446-448. doi:10.1001/archpsyc.1966.01730160110025