Patterns of Postrotary NystagIllus in Three Learning - Disabled Children ( vestibular sfmulation , sensory integration , single subject research )

This study explores the effect of a program of sensory integration therapy, with emphasis on vestibular stzmulation actzvities, on the duration of postrotary nystagmus zn three learning-disabled children. The single-subject methodology employed allowed a more individualistic and longitudinal investigation of nystagmus patterns in the three subjects. The graphic and statistical analysis of the data revealed that two of the three subJects evidenced szgnzfzcant changes in postrotary nystagmus duratzons over the 25-week period of the study. Subject 1, with inztzally low nystagmus durations, displayed an increase in duration, whereas subJect 2, with in itzally normal postrotary nystagmus durations, exhibited a response declzne in nystagmus durations. The postrotary nystagmus durations of subJect 2 remained relatively stable across both the baseline and intervention periods. The therapeutic implzcations of the findzngs are discussed, and areas in need of additional investigation are hzghlzghted. R ecent research has emphasized the importance of testing vestibular and proprioceptive functions when evaluating the neuropsychological attributes of learning-disabled childr n. Several