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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Visual impairment in children with spastic cerebral palsy measured by psychophysical and electrophysiological grating acuity tests

Full text
Author(s):
Costa, Marcelo Fernandes [1, 2, 3] ; Ventura, Dora Fix [1, 2, 3]
Total Authors: 2
Affiliation:
[1] Univ Sao Paulo, Inst Psicol, Dept Psicol Expt, BR-05508900 Sao Paulo - Brazil
[2] Univ Sao Paulo, Nucleo Neurociencias & Comportamento, BR-05508900 Sao Paulo - Brazil
[3] Univ Sao Paulo, Nucleo Neurociencia Aplicada, BR-05508900 Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Developmental Neurorehabilitation; v. 15, n. 6, p. 414-424, 2012.
Web of Science Citations: 5
Abstract

Background: This study measured grating visual acuity in 173 children between 6-48 months of age who had different types of spastic cerebral palsy (CP). Method: Behavioural acuity was measured with the Teller Acuity Cards (TAC) using a staircase psychophysical procedure. Electrophysiological visual acuity was estimated using the sweep VEP (sVEP). Results: The percentage of children outside the superior tolerance limits was 44 of 63 (69%) and 50 of 55 (91%) of tetraplegic, 36 of 56 (64%) and 42 of 53 (79%) of diplegic, 10 of 48 (21%) and 12 of 40 (30%) of hemiplegic for sVEP and TAC, respectively. For the sVEP, the greater visual acuity deficit found in the tetraplegic group was significantly different from that of the hemiplegic group (p < 0.001). In the TAC procedure the mean visual acuity deficits of the tetraplegic and diplegic groups were significantly different from that of hemiplegic group (p < 0.001). The differences between sVEP and TAC means of visual acuity difference were statistically significant for the tetraplegic (p < 0.001), diplegic (p < 0.001), and hemiplegic group (p = 0.004). Discussion: Better visual acuities were obtained in both procedures for hemiplegic children compared to diplegic or tetraplegic. Tetraplegic and diplegic children showed greater discrepancies between the TAC and sVEP results. Inter-ocular acuity difference was more frequent in sVEP measurements. Conclusions: Electrophysiologically measured visual acuity is better than behavioural visual acuity in children with CP. (AU)

FAPESP's process: 02/12733-8 - Sensory losses caused by mercury intoxication: psychophysical and neurophysiological studies in patients and in animal models
Grantee:Dora Selma Fix Ventura
Support Opportunities: Research Projects - Thematic Grants