Abstract
The ATNR of 249 subjects was scored as absent or present at serial well baby examinations (2,4,6,9,12 months). The ATNR was present at 2 months in 89% of subjects, 42% at 6 months, and persisted in 8% at 12 months. The Bayley Scales of Infant Development, Mental (Me) and Motor (Mo), were administered at one year. Data obtained were grouped by reflex activity--absent (−) and present (+)--and compared to outcome measures. Mean score for Me and Mo by ATNR activity for 2, 6, and 12 months are displayed below. Significant differences (p<.05) are noted (*).
Absent ATNR activity at either 2 months or 12 months was associated with higher mean outcome scores. This finding reflects two populations--one with lower ATNR activity at two months and higher mean outcome scores and one with higher ATNR activity at 12 months and lower mean outcome scores. Similar findings were noted for the tonic labyrinthine and positive support reflexes. The differential disappearance of brainstem mediated motor reflex patterns reflects differential central nervous system maturation as measure in both cognitive and motor areas.
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Shapiro, B., Palmer, F., Machtel, R. et al. 1610 THE ASYMMETRICAL TONIC NECK REFLEX (ATNR): INFANT INDICATOR OF LATER DEVELOPMENT. Pediatr Res 15 (Suppl 4), 711 (1981). https://doi.org/10.1203/00006450-198104001-01627
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DOI: https://doi.org/10.1203/00006450-198104001-01627
