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Query: UMLS:C0025362 (mental retardation)
 15,878 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Diagnostic criteria for Rett syndrome (RS) were developed by representatives of the International Rett Syndrome Association and the Centers for Disease Control for use in future clinical and epidemiological studies. Necessary criteria are: normal prenatal and perinatal period; normal psychomotor development through the first 6 months of life; normal head circumference at birth, with subsequent deceleration of head growth; loss of purposeful hand skills; severely impaired expressive and receptive language; apparent severe mental retardation; and gait apraxia and truncal apraxia/ataxia. Supportive criteria include breathing dysfunction, seizures, spasticity, scoliosis, and growth retardation. The diagnosis of RS is considered tentative until 2 to 5 years of age. The differential diagnosis includes other disorders associated with mental retardation, cerebral palsy, and seizure disorders. These diagnostic criteria for RS should foster reliable communication among investigators and enhance the epidemiological and clinical research of this important disorder.
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PMID:Diagnostic criteria for Rett syndrome. The Rett Syndrome Diagnostic Criteria Work Group. 245 7

The long-term outcome of infantile hydrocephalus (IH) in children born at term during a period of active shunt treatment was studied in a population-based survey. The series consisted of 68 children greater than or equal to 6 years old and born in 1967-78 in the south-western Swedish health care region. The clinical follow-up included neuro-paediatric assessment, Stott's test of motor impairment, the WISC test, CT and EEG analyses. Nineteen of the 68 children (28%) had cerebral palsy, 17 (25%) minor motor dysfunction and 32 (47%) no motor dysfunction; mental retardation was present in 26 (38%), 16 with an IQ 50-70 and 10 with IQ less than 50; 42 children (62%) had normal intelligence and epilepsy was found in 15 (22%). Compared with a non-shunted IH series from the 1950s, the survival of IH children had considerably increased. Of constituents characterizing the IH syndrome from the time prior to shunting, ataxia, divergent squint and the special "Cocktail-party behaviour" had significantly decreased, all of which conditions are highly related to chronic expansion of the ventricular system. The frequencies of other impairments such as mental retardation and epilepsy were fairly similar, reflecting the present increased survival of IH children with primarily non-IH-dependent brain damage. IH children with associated brain parenchymal defects had the poorest outcome, and those without had in general a much more favourable one. Thus the single most important factor for the outcome of IH was found to be the presence or absence of associated primary brain damage or maldevelopment.
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PMID:Epidemiology of infantile hydrocephalus in Sweden: a clinical follow-up study in children born at term. 246 73

A review of 965 children with neurological disorders, seen at the Paediatric Neurology Clinic of the University of Nigeria Teaching Hospital (UNTH), Enugu, over a 3-year period (1985-1987), revealed that epilepsy was the most common neurological problem affecting 60% of the children, followed by cerebral palsy (16%), speech disorders (8.3%), mental retardation (7.2%), behaviour disorders (2.2%), paralytic poliomyelitis (1.55%), premature craniosynostosis (1.0%), visual and auditory impairment (1.0%) and muscle disorders (0.72%). Perinatal problems such as birth asphyxia, severe neonatal jaundice and infections were the most common aetiological factors identified. Facilities for rehabilitation of the children were inadequate and this, together with the people's ignorance of the natural history of some of the neurological disorders, may account for the high rate of default from follow-up observed in this study. The need for improved maternal and perinatal health services and vigorous health education strategies is emphasized by this review. The positive effect of the Expanded Programme on Immunization (EPI) is reflected in the sharp decline in the proportion of children with neurological disorders owing to paralytic poliomyelitis, from 9.2% in the period 1978-1980, to 1.55% in the present study.
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PMID:A review of neurological disorders seen at the Paediatric Neurology Clinic of the University of Nigeria Teaching Hospital, Enugu. 248 97

In the Dundee Development Screening Programme all children born in Dundee in 1974 and 1975 were screened at intervals during infancy and childhood. The obstetric and neonatal antecedent factors in 300 of the 322 singleton children with neurodevelopmental disability (index group) were compared with those of the 600 children of normal development born immediately before and after each child with disability (control group). Low social class was associated with mental retardation, global delay, speech delay, and behavioural disorder, but not with cerebral palsy or motor delay. With the exception of cerebral palsy, strong associations were found between all categories of disability and severe hypertension, unclassified antepartum haemorrhage, and preterm uterine activity. Cerebral palsy was not associated with antepartum complications, but was with fetal tachycardia during labour. Our data suggest that neurodevelopmental disability may, in many cases, originate during pregnancy and delivery.
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PMID:Do pregnancy complications contribute to neurodevelopmental disability? 257 5

The incidence of congenital heart defects (CHD) in a birth cohort of 12,058 live births born in Northern Finland in 1966 was 4.15/1000 with a mortality due to CHD 1.41/1000 up to 14 years of age. The long-term social and educational outcome for CHD children was significantly poorer than for normal children of the same age when evaluated on the basis of school and army service records, and the incidence of cerebral palsy, epilepsy and mental retardation was significantly higher. 15.4% of the Down's syndrome cases in the cohort also had CHD. The CHD boys were significantly lighter in weight than the controls even as adolescents (14 years of age). The only difference between the operated and non-operated group was the higher weight of the boys at the age of 18 years in the former.
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PMID:Long-term outcome for children with congenital heart defects. A study from 1 year birth cohort born in 1966 in northern Finland. 259 Mar 16

We describe a 10-year-old boy with hyperprolinaemia type I and severe neurological abnormalities (mental retardation, cerebral palsy, epilepsy, nystagmus). Magnetic resonance imaging showed diffuse white matter involvement and electroretinography confirmed tapetoretinal degeneration. In view of reports in the literature, hyperprolinaemia type I may not be a benign condition, as usually assumed, but may lead to marked neurological abnormalities, particularly in affected males.
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PMID:Hyperprolinaemia type I and white matter disease: coincidence or causal relationship? 260 26

Sialorrhea is a frequent problem in children with mental retardation and cerebral palsy. In addition to cosmetic considerations, serious medical and psychosocial consequences may result from the situation. The most effective treatment at the present time is bilateral submandibular gland excision and parotid duct ligation. Various means of physical therapy may play a valuable adjunctive role. Control of sialorrhea improves appearance, hygiene, and self-esteem as well as reduces the demands of those who care for the child with sialorrhea.
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PMID:Sialorrhea. 268 26

Developmental enamel defects in primary teeth have been found at least twice as frequently in children with cerebral palsy or mental retardation as in control children, and frequently also in children with sensori-neural hearing deficits. The developing tooth germ is sensitive to a range of systemic disturbances, some of which may also affect neurologic development. Because the enamel cannot recover once it is damaged, it may provide a repository of information on the timing and nature of insults potentially affecting other ectodermally derived structures, including the brain. This paper reviews the literature on developmental defects of enamel in primary teeth, asking whether these might be useful as biological markers of the timing and in some cases the nature of insults. Among systemic factors related to development of enamel that might also have implications for neurologic development are certain genetic disorders including tuberous sclerosis, premature birth, neonatal nutritional disturbances (especially hypocalcemia), viral infections (such as rubella and cytomegalovirus during gestation), thyroid disorders, and maternal diabetes. It is concluded that further research is warranted concerning whether developmental defects of dental enamel can be useful markers for the timing of intra-uterine or perinatal events associated with certain neurologic and sensory disorders of children.
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PMID:Developmental enamel defects in primary teeth in children with cerebral palsy, mental retardation, or hearing defects: a review. 270 Nov 56

Cerebral palsy is a permanent and non-progressive brain damage due to various causes affecting a child from the intrauterine life up to the first two years of life. Its most common cause is neonatal hypoxic encephalopathy. The cerebral damage is diffuse so that it is commonly associated with epilepsy, mental retardation, dysarthria, hearing loss and oculomotor abnormalities. Strabismus is found in 50% of children with cerebral palsy. This prevalence is significantly different from the 2% incidence of oculomotor abnormalities in the pre-school age, it is noteworthy that strabismus and refractive errors respond to the classical therapeutic measures.
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PMID:[Physiopathology of ocular movements in infantile cerebral paralysis]. 270 64

The purpose of this study was to investigate the impact of maternal prepregnancy and pregnancy-related risk factors, complicated delivery, and perinatal morbidity on subsequent handicaps in children. We surveyed a birth cohort of 4102 mothers and 4138 children in Frederiksborg County, Denmark. Maternal risk factors were defined according to guidelines published by the Danish National Board of Health, and perinatal morbidity and handicaps according to World Health Organization guidelines. The incidence of handicaps: (cerebral palsy, mental retardation [mild and severe], epilepsy, severe defects of vision and hearing); was 44 of 4038 children (twins and neonatal deaths were excluded). A combination of three or more maternal risk factors was found to be a predictor of risk for children with later handicaps; the incidence of handicaps was 11 times higher than in mothers with no risk factors. Eleven percent of all mothers had three or more risk factors and they had 43% of the handicapped children. Multiparity increased the risk in all risk categories. Of complications at delivery, intrapartum asphyxia, as evident from Apgar scores of less than 7 at 1 minute and less than 10 at 10 minutes in particular, was a strong predictor of a later handicap. Premature rupture of membranes for more than 24 hours was also significantly associated with later handicaps. Perinatal morbidity was correlated with a later handicap. The perinatal complication most strongly associated with later handicaps was low birthweight. Forty-eight percent of the affected children had a birthweight of less than 2500 gm and were small for gestational age. We conclude that the incidence of handicaps could possibly be reduced if the causes of the following maternal risk factors were identified and, if possible, eliminated: previous delivery of a child with a birthweight less than 2500 gm, previous delivery of a stillborn child, repeated abortions, severe infection during pregnancy, intrauterine growth retardation, and preterm delivery. Improved intrapartum diagnosis and prevention of asphyxia and treatment of children born with low Apgar scores would reduce the incidence of handicaps, as would intervention to prevent premature rupture of the membranes of more than 24 hour's duration.
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PMID:Antenatal and perinatal conditions correlated to handicap among 4-year-old children. 271 25


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