Mental retardation: a new challenge
Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie/South African Journal of Science and Technology
| Field | Value | |
| Title | Mental retardation: a new challenge Verstandelike vertraging: ’n nuwe uitdaging | |
| Creator | Op't Hof, J. | |
| Description | Although the care of the mentally handicapped in the RSA has improved over the past decades, it has only recently been possible to accurately establish the causes of mental retardation (MR). According to the WHO, the average incidence of severe MR (IQ 50) is approximately 3-4 per 1 000 of the general population, while mild MR (IQ 50-70) occurs in about 20-30 individuals per 1 000 of the population. Genetic diagnostic investigations by the Genetic Services Division of the Department of National Health and Population Development have shown that the causes of serious MR at a school for white mentally retarded individuals can be divided as: genetic: 46%; non-genetic: 17%; and unknown causes: 37%. Chromosome abnormalities are the most important cause (± 18%) of MR, with Down syndrome and the Martin-Bell syndrome being the most common examples. Alhoewel die versorging van verstandelike vertraagdes in die RSA die afgelope dekades verbeter het, het dit eers onlangs moontlik geword om die oorsake van verstandelike vertraging (VV) akkuraat te bepaal. Volgens die WGO is die gemiddelde voorkoms van ernstige VV (IK 50) ongeveer 3-4 per 1 000 van die algemene bevolking, terwyl matige VV (IK ± 50-70) by ongeveer 20-30 persone per 1 000 van die bevolking voorkom. Geneties-diagnostiese ondersoeke wat deur die Afdeling Genetiese Dienste van die Departement van Nasionale Gesondheid en Bevolkingsontwikkeling uitgevoer is, het aangetoon dat die oorsake van ernstige VV in ’n skool vir blanke verstandelik vertraagde indiwidue soos volg verdeel kan word: genetiese oorsake: 46%; nie-genetiese oorsake: 17%; en onbekende oorsake: 37%. Chromosoomabnormaliteite is die belangrikste oorsaak (± 18%) van VV, waarvan Down-sindroom en die Martin-Bell-sindroom die algemeenste is. | |
| Publisher | AOSIS | |
| Date | 1987-03-17 | |
| Identifier | 10.4102/satnt.v6i2.945 | |
| Source | Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie; Vol 6, No 2 (1987); 57-63 Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie; Vol 6, No 2 (1987); 57-63 2222-4173 0254-3486 | |
| Language | eng | |
| Relation |
The following web links (URLs) may trigger a file download or direct you to an alternative webpage to gain access to a publication file format of the published article:
https://journals.satnt.aosis.co.za/index.php/satnt/article/view/945/1959
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