Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0029713 (immaturity)
 4,335 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Vestibular function tests were performed on a series of 57 children between the ages of 1 and 16 years. Inattention and immaturity of eye movement control created difficulties in the analysis of the electronystagmography traces in some instances. With the eyes closed, spontaneous and positional nystagmus occurred in 20% of asymptomatic children and this was thought to be physiological. Changes in external ear pressure (fistula test) enhanced this spontaneous nystagmus. Smooth pursuit ataxia and optokinetic abnormalities were common in the children with reading disabilities and those with congenital deafness, and were thought to be soft neurological signs of brainstem dysfunction. The torsion swing chair test was acceptable and gave easily readable responses. Caloric abnormalities were very common in children with reading disabilities and provided useful information in those with congenital and acquired disorders of hearing and balance. It was concluded that normal data were required for children of all ages in order to improve our understanding of electronystagmography in children.
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PMID:Vestibular function tests in children. 687 45

Endogenous P300 and exogenous slow vertex potentials were obtained with tone and speech stimuli in a group of five children using a cochlear implant (CI) with poor speech recognition (group A) and compared with those from another group of five children using a CI with good speech recognition (group B). The responses were also compared to those of children with normal hearing (n= 14) and a group of adult CI users (n=9). N1 and P2 latencies of CI group A and group B were prolonged compared to those of normally-hearing children. In group A, P300 was present when contrasts with tone stimuli were used. When speech stimuli were used, P300 potentials were absent or delayed. P300 potentials obtained in group B were no different from those obtained in normally-hearing children. It is suggested that the poor results evoked with speech stimuli in contrast to those evoked with pure-tone stimuli in group A are due to the immaturity of (sub) cortical generators associated with acoustical and phonetic processing. In contrast to the children in group B, all children in group A suffered from congenital deafness.
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PMID:Evaluation of cochlear implant benefit with auditory cortical evoked potentials. 1240 11