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Journal of the Korean Academy of Rehabilitation Medicine 1999;23(5):913-917.
Influences of Primitive Reflex on Infants with Delayed Motor Development.
Jung, Han Young , Paik, Kyung Woo
Department of Rehabilitation Medicine, Inha University College of Medicine.
원시반사가 운동 발달 지체 영아에 미치는 영향
정한영, 백경우
인하대학교 의과대학 재활의학교실

To clarify the relationship of primitive reflexes and motor development during second six months of age.

All infants were referred to Inha University Hospital Cerebral Palsy Clinic from January 1, 1996 to March 30, 1997. Identical evaluations were performed on 49 risk infants at eight months of age. Their primitive reflexes were graded on a 0∼2 scale; 0 being inability to elicit the reponses passively, 1 being intermediate degree, 2 being obligatory. The following primitive reflexes were studied; asymmetric tonic neck reflex (ATNR), tonic labyrinthine reflex on supine (TLS), Moro reflex (Moro). The presence of some voluntary activities (rolling prone to supine, rolling supine to prone, and sitting unsupported) were observed. The Mantal-Haenszel chi-square for trend test was used in order to study the association of primitive reflex and motor development in infants with delayed development.

Inability of rolling prone to supine was most significantly associated with presence of ATNR and TLS but not with that of Moro reflex. Inability of rolling supine to prone was significantly associated with presence of TLS and then Moro reflex, ATNR. Inability to Sit independently without support was associated with the presence of TLS, but not with that of ATNR and Moro reflexes.

This study suggests that the presence of primitive reflexes at second half of age are negatively influenced on motor development of infants.

Key Words: Cerebral palsy, Motor development, Primitive reflex


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