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PubMed2000

Epilepsy and epileptiform EEG: association with autism and language disorders.

The relationship between epilepsy, language, behavior, and cognition is not well understood. Developmental and acquired disabilities such as autistic spectrum disorders, Landau-Kleffner Syndrome, electrical status epilepticus in sleep, and developmental dysphasias have been associated with epileptiform abnormalities. These disorders share many common features and raise important questions regarding this intricate relationship. This article reviews these disorders and discusses the proposed interaction between epileptiform abnormalities and cognitive dysfunction. Diagnostic and treatment issues will also be reviewed.

Autistic Disorder↗
PubMed2000

Language disorders: a 10-year research update review.

OBJECTIVE: To review the past 10 years of research in child language or communication disorders, which are highly prevalent in the general population and comorbid with childhood psychiatric disorders. METHOD: A literature search of 3 major databases was conducted. The child language literature, describing the domains of language development--phonology, grammar, semantics, and pragmatics--is reviewed. RESULTS: Disorders of grammar, semantics, and pragmatics, but not phonology, overlap significantly with childhood psychiatric disorders. Receptive language disorders have emerged as high-risk indicators, often undiagnosed. Language disorders and delays are psychiatric risk factors and have implications for evaluation, therapy, and research. However, they are often undiagnosed in child mental health and community settings. The research has focused mostly on monolingual English-speaking children. CONCLUSION: Awareness of basic child language development, delay, and deviance is crucial for the practicing child and adolescent psychiatrist, who must diagnose and refer relevant cases for treatment and remediation. Future research needs to address the growing language diversity of our clinical populations.

Adolescent↗
PubMed1995

Sensory modulation of auditory stimuli in children with autism and receptive developmental language disorder: event-related brain potential evidence.

Three groups of age- and PIQ-matched children (Autism, Receptive Developmental Language Disorder, and normal controls) participated in two event-related brain potential (ERP) experiments. Each of these experiments was aimed at evaluating whether either of the two clinical groups of children demonstrated abnormalities in two auditory ERP components, N1 and P2, which are known to be dependent on stimulus characteristics (frequency, intensity, and probability), and believed to be generated within primary and secondary cortex. Results of Experiment 1 provide partial support for the idea that both clinical groups failed to fully process changes in stimulus intensity as indexed by the N1 component. Results are discussed in reference to potential abnormalities in serotonergic regulation of auditory cortex.

Adolescent↗
PubMed1994

[Short term memory and severe language disorders in the child].

Memory, and particularly short-term memory or "working memory" (Baddeley), is involved in language acquisition in children. We have studied short-term memory, with verbal-and non verbal tests, of 8 children suffering from developmental dysphasia compared with other ones, matched in terms of age and performance I.Q. (W.I.S.C.-R.). The digit span did not significantly differ in the two groups, while the visuo-spatial span was lower in the dysphasic group. The memorization of a list of monosyllabic words by dysphasic children was poor in the absence of visual presentation and improved by it. Differences between dysphasic and control-children are unlikely to be due to speech rate which does not significantly differ from one group to the other one. The results suggest the existence, in language disordered children, of cognitive functions disorders much more important than those directly involved in the speech production.

Case-Control Studies↗
PubMed1984

A longitudinal study of a hyperlexic child: hyperlexia as a language disorder.

The longitudinal study of a hyperlexic girl, A.E., is described. Although her WISC-R IQ was 58, her reading was significantly advanced for age and level of intellectual functioning. She was socially withdrawn and displayed repetitive and self-stimulation behaviors. At birth she weighed 1000 g and was 32 weeks gestational age. She had severe respiratory distress, seizures and apnea in the perinatal period. She had a history of significantly delayed development, although the delays were more pronounced in language than in perceptual motor skills. She demonstrated difficulties with semantic and syntactic processing of language and could read words and sentences of which she had little or no comprehension. The existence of reading in spite of severely disordered language suggests that reading may occur by visual and/or phonological routes but that semantic and syntactical processing of words is not essential.

Child↗
PubMedDate not supplied

Exploring the contribution of the cerebral hemispheres to language comprehension deficits in adults with developmental language disorder.

A divided visual field, priming paradigm was used to observe how adults who have a history of developmental language disorder (DLD) access lexically ambiguous words. The results show that sustained semantic access to subordinate word meanings (such as BANK-RIVER), which is seen in control subjects, is disrupted in the right cerebral hemisphere for this special population of readers. In the left hemisphere, only the most dominant meaning of the ambiguous word shows sustained priming in both controls and DLD participants. Therefore, for the DLD readers the subordinate meanings of words are not primed in either hemisphere and, thus, may not be available during online processing and integration of discourse. This right hemisphere lexical access deficit might contribute to the language comprehension difficulties exhibited by adult readers with a history of DLD.

Adult↗
PubMed1984

Speech and language disorders in children.

Speech and language development is a sensitive and important diagnostic tool for the family physician. Speech defects and delayed speech and language development can be the presenting evidence for neurologic abnormalities, cognitive difficulties and abnormal hearing. They can also be signs of emotional, social, family and behavioral problems. Finally, they can signify the need for evaluation of abnormalities of tracheal and laryngeal function and oral-motor development.

Attention Deficit Disorder with Hyperactivity↗
PubMed1986

Kinetics of 3H-serotonin uptake by platelets in infantile autism and developmental language disorder (including five pairs of twins).

The kinetics of 5-HT uptake by platelets was studied in cases of infantile autism and developmental language disorder (DLD) and normal subjects. Two patients of the autism group were twins, and the seven patients of the DLD group were members of four pairs of twins. The Vmax values (means +/- SD) for autism and DLD were 6.46 +/- .90 pmol 5-HT/10(7) cells/min and 4.85 +/- 1.50 pmol 5-HT/10(7) cells/min, respectively. These values were both significantly higher than that of 2.25 +/- .97 pmole 5-HT/10(7) cells/min for normal children. The Km values of the three groups were not significantly different. Data on the five pairs of twins examined suggested that the elevated Vmax of 5-HT uptake by platelets was determined genetically.

Autistic Disorder↗
PubMed1996

Associations among familial sinistrality, allergies, and developmental language disorders.

Here we report the results of a study that tested what has become known as the Geschwind hypothesis (Geschwind & Galaburda, 1987). This study involved 526 people who were tested by an allergist for IgE-mediated allergies and who filled out a 12-item handedness questionnaire that also included questions about eyedness, prevalence of left-handedness in the immediate family, and familial developmental language problems. A series of log-linear analyses revealed that if the definition of "anomalous" included left-handedness and having a first-order left-handed relative, one was indeed more likely to be allergic than were those not so classified. When the definition of anomalous simply included those classified as left-handed, the results were not significant. Parallel findings resulted when the criterion variable was the presence of developmental language disorders. No evidence was found for relations between allergies and developmental language problems.

Adolescent↗