“…This is widely re garded as a form of learning [Buckwald and Humphrey, 1973;Kandel, 1979] and there is good evidence that a normal habituation pattern reflects an intact central nervous sys tem [Jeffrey and Cohen, 1971;Wyers et al, 1973], Human fetal movements can be easily monitored by real-time ultrasound and habi tuation of the movement response to re peated vibroacoustic stimuli has been dem onstrated using real time ultrasound [Leader et al, 1982a;Birnholz and Benacerraf, 1983;Bennett, 1984;Madison et al, 1986a] while others [Granicr-Deferre et al, 1985;Lecanuet et al, 1986] have demonstrated a decre ment in both the heart rate and fetal move ment response to broad spectrum sound stimulation.…”