Flexion reflex responses in biceps femoris and tibialis anterior in human neonates

Abstract Flexion reflex responses to innocuous stimulation were examined in 11 human neonates. Reflexes were seen in tibialis anterior at a shorter latency and were larger than in biceps femoris. This may be associated with the positive ‘Babinski’ sign and, therefore, may reflect immaturity in spinal processing in neonates.