Development of smooth pursuit tracking in young infants.
Eye and head movements were measured in a group of infants at 2, 3, and 5 months of age as they were attentively tracking an object moving at 0.2 or 0.4 Hz in sinus or triangular mode. Smooth pursuit gain increased with age, especially until 3 months. At 2-3 months, the lag of the smooth pursuit was small for the sinusoidal motion but large for the triangular one. At 5 months, smooth pursuit was leading the sinusoidal motion and the lag for the triangular one was small. Head tracking increased substantially with age and its lag was always large.
von Hofsten
C
C
Department of Psychology, Umeå University, Sweden. claes.von.hofsten@psy.umu.se
Rosander
K
K
D000375:Aging; D001288:Attention; D002657:Child Development; D004585:Electrooculography; D005133:Eye Movements; D019416:Head Movements; D006801:Humans; D007223:Infant; D011698:Pursuit, Smooth / Q000502:physiology*; D012438:Saccades / Q000502:physiology; D013997:Time Factors