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PubMed2005

The language of dissociation.

Three case studies of inner-city elementary school children illustrate the connection between speech-language disorders and dissociative disorders in children who have known or suspected trauma histories. The role of speech language pathologists in identifying and responding to dissociative symptoms in children is explored. Lack of adequate training concerning the impact of trauma and scarce literature on the communication profiles of dissociative children contributes and greatly impacts the diagnosis, referral, and treatment of these children. The case studies demonstrate how unusual speech and language symptoms and awareness of dissociative features may aid in identifying trauma-related problems and instituting effective treatment. Grounding techniques and specific language interventions can assist children in acquiring the vocabulary needed for communicating both their daily experiences and traumatic histories. The nature of the relationship between dissociation and communication disorders is explored, and the importance of future research, interdisciplinary collaboration, and trauma training in the speech-language curriculum is emphasized.

Child↗

PubMedDate not supplied

[Specific language impairment in adolescents: a follow-up case study].

BACKGROUND: A follow-up study of an individual with Specific Language Impairment. AIM: To describe the oral and written language development of an adolescent during 13 years of intervention. METHOD: A Male subject, 16 years old, in the second year of high school, who was assessed during the years with different language and auditory procedures. RESULTS: The Subject still presents oral and written language deficits, but these do not compromise intelligibility in any level. CONCLUSION: The studied subject presented significant language development during the therapeutic process. However, corroborating with other literature data, deficits still remain.

Adolescent↗

PubMed2003

Neurolinguistic development in deaf children: the effect of early language experience.

Recent investigations have indicated a relationship between the development of cerebral lateralization for processing language and the level of development of linguistic skills in hearing children. The research on cerebral lateralization for language processing in deaf persons is compatible with this view. We have argued that the absence of appropriate input during a critical time window creates a risk for deaf children that the initial bias for left-hemisphere specialization will be distorted or disappear. Two experiments were conducted to test this hypothesis The results of these investigations showed that children educated early and intensively with cued speech or with sign language display more evidence of left-hemisphere specialization for the processing of their native language than do those who have been exposed later and less intensively to those languages.

Adult↗

PubMed1992

Future trends in language intervention: addressing cultural bias in service delivery.

In this paper the cultural biases in a widely-used language intervention approach--the Hanen Early Language Parent Program--that trains parents to be conversational partners with their language-delayed children, are explored. In many respects this program represents the best of current clinical practice. It is empirically and theoretically grounded in recent research on parent-child interaction; studies have documented its efficacy; and it is a family-centred approach. And yet, in clinical practice, it does not work with all families. Not surprisingly, these families are often from nonmainstream backgrounds. Potential reasons for the lack of effectiveness with some families become apparent as research on patterns of language socialization in a wide variety of cultures is reviewed. This review reveals that all of the basic premises of this program rest on culturally relative beliefs and values. Specifically considered are cultural variation in (1) aspects of social organization related to interaction, (2) the value of talk, (3) how status is handled in interaction, (4) beliefs about intentionality, and (5) beliefs about teaching language to children. Suggestions for incorporating this information into clinical services with nonmainstream families are offered.

Child↗

PubMed1994

Clinical decision making: describing the decision rules of practicing speech-language pathologists.

The diagnostic decision-making standards used by practicing clinicians to determine language impairment were investigated. Randomly selected ASHA members who worked with children were asked to review hypothetical and real case profiles of children ages 4 to 9:11 (years: months) with language performance skills ranging from slightly above average to substantially below average. Based on the child's age and language and intelligence test information, clinicians were asked to decide if the child was language impaired (LI) and, if so, to provide a severity rating. Results show significant interrater agreement among the 27 clinicians' LI decisions (generalized kappa = 0.14, p < .0001) and moderate intrarater reliability within clinician's LI decisions (phi = .68). Most of the clinicians' diagnostic decision-making standards could be modeled using stepwise logistic regression. These decision rules can provide guidance for those who wish to employ diagnostic standards that reflect those used in clinical practice. Also, these results provide insight into the manner in which clinicians use information for the determination of language impairment.

Adult↗

PubMedDate not supplied

[The lexical aspects in children with expressive language delay].

This study examines the lexical characteristics of language development of 17 children between 24 and 41 months of age with a history of slow expressive language acquisition (experimental group). The purpose of the investigation is to compare these subjects to 49 children (ranging in age from 13-24 months) with a normal language history matched for vocabulary size to determine, whether the expressive vocabulary of children with language delay is same to normal group. The data were collected using the parental report instrument "Il Primo Vocabolario del Bambino"(Caselli and casadio 1995) the Italian version of MacArthur Communicative Development Inventories (Fenson et al. 1993). For analyses of word production, children were divided into four groups based on their total vocabulary size: 1) 11 to 20 words; 2) 21 to 50 words; 3) 51 to 100 words; 4) 101 to 200 words. Analysis revealed a significant difference in verbs and grammatical function words when the level of vocabulary size of experimental group was between 21 and 50 words. In the other vocabulary size there were not significant differences. In summary the results of this study show that the vocabulary composition of children with slow expressive language acquisition is same that of children 14-16 months younger.

Child, Preschool↗

PubMed1982

Prediction of achievement in reading, self-esteem, auding, and verbal language by adult illiterates in a psychoeducational tutorial program.

Examined the effectiveness of specific psychoeducational tutoring methods on achievement in reading, self-esteem, auding, and verbal language, Ss (N = 132) were youths and adults reading below fifth level who volunteered to participate in an adult tutorial project. After the assessment of entry level achievement, Ss received psychoeducational tutoring. Comparison of pre- with posttest scores scores indicated that Ss made significant improvement in reading, self-esteem, auding, and verbal language. Pretest scores were related most strongly to posttest scores. Initial verbal language scores were related significantly to posttest reading and auding scores. The study also tested the adequacy of a developmental reading model for adult illiterates. Auding and verbal language scores exceeded reading scores, as theorized. Further research is needed to determine whether gains in achievement continue and whether low intellectual levels or specific language disabilities are contributing to the low levels of reading, auding, and verbal language.

Achievement↗

PubMed1976

The sociology of language in Johann David Michaelis's dissertation of 1760.

In 1759 Johann David Michaelis won a prize from the Prussian Royal Academy for his essay Beantwortung der Frage von dem Einfluss der Meinungen in die Sprache, und der sprache in die Meinungen. The essay was published in the following year and translated into French in 1762, into English in 1769, and into Dutch in 1771. The work has two major themes--linguistic relativity and language change--with ancillary discussions of language in general and of homonymy. Its most significant contribution to the theory of language is its discussion of linguistic relativity, especially in its manifestations in the influence of language on thought. Given the intellectual milieu of the work where inquiry was centered on the origin of language and language universals, it stands as one of the few discussions of this topic and it is also one of the most fruitful discussions of linguistic relativity for any period of history.

Germany↗

PubMed1997

Visualization-based mapping of language function in the brain.

Cortical language maps, obtained through intraoperative electrical stimulation studies, provide a rich source of information for research on language organization. Previous studies have shown interesting correlations between the distribution of essential language sites and such behavioral indicators as verbal IQ and have provided suggestive evidence for regarding human language cortex as an organization of multiple distributed systems. Noninvasive studies using ECoG, PET, and functional MR lend support to this model; however, there as yet are no studies that integrate these two forms of information. In this paper we describe a method for mapping the stimulation data onto a 3-D MRI-based neuroanatomic model of the individual patient. The mapping is done by comparing an intraoperative photograph of the exposed cortical surface with a computer-based MR visualization of the surface, interactively indicating corresponding stimulation sites, and recording 3-D MR machine coordinates of the indicated sites. Repeatability studies were performed to validate the accuracy of the mapping technique. Six observers-a neurosurgeon, a radiologist, and four computer scientists, independently mapped 218 stimulation sites from 12 patients. The mean distance of a mapping from the mean location of each site was 2.07 mm, with a standard deviation of 1.5 mm, or within 5.07 mm with 95% confidence. Since the surgical sites are accurate within approximately 1 cm, these results show that the visualization-based approach is accurate within the limits of the stimulation maps. When incorporated within the kind of information system envisioned by the Human Brain Project, this anatomically based method will not only provide a key link between noninvasive and invasive approaches to understanding language organization, but will also provide the basis for studying the relationship between language function and anatomical variability.

Brain Mapping↗

PubMed1991

TQuery: a context-sensitive temporal query language.

Users of electronic medical databases request pertinent information by recasting their clinical questions into a formal database query language. Because the query language is the user's only access to the data, the query language must be powerful enough to enable users to express their data requirements. However, a competing need is for the query language to be restrictive enough so that queries can have unambiguous semantics and the query processor can generate correct answers. We describe a query language, called TQuery , that was designed specifically to formulate database queries that are dependent on temporal and contextual relationships. TQuery specifications express contextual constraints without the need to explicitly reference calendar dates. TQuery is the database query language used to retrieve patient data from an object-oriented electronic patient medical-record system called the temporal network (TNET). TNET and TQuery were developed to support the real-time temporal reasoning and representation needs of a LISP workstation-based medical expert system.

Databases, Factual↗

PubMed1994

Planum temporale asymmetry and language dominance.

Language is lateralized to the left hemisphere in most individuals, and leftward asymmetry of the planum temporale has been reported in postmortem and imaging studies. In this study we measured the planum temporale on magnetic resonance imaging (MR) scans of patients (11 right-handers, 1 non-right-hander) who had selective hemispheric anesthesia or Wada testing performed for language lateralization. All subjects who had language lateralized to the left hemisphere (11 right-handers) had a leftward asymmetry of the planum temporale. One subject who had language lateralized to the right hemisphere (non-right-hander) had a strong rightward asymmetry of the planum temporale. These data suggest that planum temporale asymmetries determined by MR are associated with language dominance and may predict language laterality.

Adolescent↗

PubMedDate not supplied

Lesion analysis of the brain areas involved in language comprehension.

The cortical regions of the brain traditionally associated with the comprehension of language are Wernicke's area and Broca's area. However, recent evidence suggests that other brain regions might also be involved in this complex process. This paper describes the opportunity to evaluate a large number of brain-injured patients to determine which lesioned brain areas might affect language comprehension. Sixty-four chronic left hemisphere stroke patients were evaluated on 11 subtests of the Curtiss-Yamada Comprehensive Language Evaluation - Receptive (CYCLE-R; Curtiss, S., & Yamada, J. (1988). Curtiss-Yamada Comprehensive Language Evaluation. Unpublished test, UCLA). Eight right hemisphere stroke patients and 15 neurologically normal older controls also participated. Patients were required to select a single line drawing from an array of three or four choices that best depicted the content of an auditorily-presented sentence. Patients' lesions obtained from structural neuroimaging were reconstructed onto templates and entered into a voxel-based lesion-symptom mapping (VLSM; Bates, E., Wilson, S., Saygin, A. P., Dick, F., Sereno, M., Knight, R. T., & Dronkers, N. F. (2003). Voxel-based lesion-symptom mapping. Nature Neuroscience, 6(5), 448-450.) analysis along with the behavioral data. VLSM is a brain-behavior mapping technique that evaluates the relationships between areas of injury and behavioral performance in all patients on a voxel-by-voxel basis, similar to the analysis of functional neuroimaging data. Results indicated that lesions to five left hemisphere brain regions affected performance on the CYCLE-R, including the posterior middle temporal gyrus and underlying white matter, the anterior superior temporal gyrus, the superior temporal sulcus and angular gyrus, mid-frontal cortex in Brodmann's area 46, and Brodmann's area 47 of the inferior frontal gyrus. Lesions to Broca's and Wernicke's areas were not found to significantly alter language comprehension on this particular measure. Further analysis suggested that the middle temporal gyrus may be more important for comprehension at the word level, while the other regions may play a greater role at the level of the sentence. These results are consistent with those seen in recent functional neuroimaging studies and offer complementary data in the effort to understand the brain areas underlying language comprehension.

Aged↗

PubMedDate not supplied

Impact of language barrier on acute care medical professionals is dependent upon role.

Communication with patients is essential to providing quality medical care. The study was conducted to evaluate the effects of language barriers on health care professionals. It is hypothesized that these language barriers are commonly perceived by health care professionals and they are a source of workplace stress in acute care environments. We designed and distributed a survey tool of staff experiences and attitudes regarding the English-Spanish language barrier among patients in an acute care surgical environment of a tertiary medical center. Responses were anonymous, stratified by professional role and comparisons made using paired t tests. Sixty-one nurses and 36 physicians responded to the survey. Overall, 95% of nurses reported that the language barrier was an impediment to quality care, whereas 88% of physicians responded similarly (P = .0004). More nurses than physicians report experiencing stress (97% vs. 78%) and the degree of stress appears to be greater for nurses (P < .0001). The basis of stress was unique between the two groups. This study demonstrates that acute care hospital medical professionals perceive language barriers as an impediment to quality care delivery and as a source of workplace stress. Nurse and physician perceptions differ; therefore, strategies to address these language barriers should be specific to those professional roles. These barriers create a void in health care quality and safety that has effects on health care professionals.

Academic Medical Centers↗

PubMed1993

Visual and language processing deficits are concurrent in dyslexia.

Research has demonstrated that dyslexic subjects have language processing problems. More recent evidence indicates that dyslexic subjects also suffer a low-level visual information processing deficit. Little evidence is available to indicate the extent to which dyslexic subjects simultaneously show a visual and language processing dysfunction. In this study, 35 normal and 35 dyslexic subjects aged from 7.9 to 14 years of age were compared on three reading process variables, a visual processing score, a test of phonological coding and a test of language comprehension, each of which were shown to be related to reading performance. The visual processing score was the slope of the regression line predicting the duration of visible persistence as a function of spatial frequency. The language processing measures were a test of phonological coding of orthographically legal Non-Words and a test of language comprehension, the Token Test. The results showed that the visual processing score was significantly predictive of group membership with 91% of the dyslexic group and only 20% of the normal readers having low scores on this measure. The Non-Word test was found to be a perfect discriminator for dyslexia by indicating that every subject in this group had a major phonological coding deficit. An unexpected finding of the present results was that the Token Test did not discriminate between the groups. The results are interpreted as providing evidence for the concurrence of visual and language deficits in dyslexia.

Adolescent↗

PubMed2002

Vaccinology for control of apicomplexan parasites: a simplified language of immune programming and its use in vaccine design.

Most mammalian immune systems and parasites have co-evolved over the millennia, interacting within a common environment and communicating through a common language. This language is comprised of copious dialects in which a variety of host innate and acquired immune pathways actively interact with a multitude of parasite-specific survival strategies. Nonetheless, a simplified language is likely present since the same basic molecular and cellular mechanisms are associated with resistance or susceptibility to parasite infection. Protective immunity against protozoa within the phylum Apicomplexa (e.g. Cryptosporidia, Eimeria, Neospora, Plasmodia and Toxoplasma) is generally CD4+ T cell-dependent and elicited along the IL-12/IFN-gamma/iNOS effector axis. This simplified language can be decoded in part by significant advances in understanding naïve T cell activation, differentiation and generation of immunologic memory. Vaccine adjuvants and new immunisation strategies for generation of more potent immunity can also be viewed through this common language lens. The aim of this paper is to summarise recently published fundamental immunology studies, their relevance through examples in specific coccidian-host immune dialects, and how this simplified language can be used for the more rationale design of parasite vaccine control strategies.

Adjuvants, Immunologic↗

PubMed2003

Language evolution: consensus and controversies.

Why is language the way it is? How did language come to be this way? And why is our species alone in having complex language? These are old unsolved questions that have seen a renaissance in the dramatic recent growth in research being published on the origins and evolution of human language. This review provides a broad overview of some of the important current work in this area. We highlight new methodologies (such as computational modeling), emerging points of consensus (such as the importance of pre-adaptation), and the major remaining controversies (such as gestural origins of language). We also discuss why language evolution is such a difficult problem, and suggest probable directions research may take in the near future.

Journal Article↗

PubMed1999

Possible stages in the evolution of the language capacity.

Much current discussion of the evolution of language has concerned the emergence of a stage in which single vocal or gestural signals were used symbolically. Assuming the existence of such a stage, the present review decomposes the emergence of modern language into nine partially ordered steps, each of which contributes to precision and variety of expression. Bickerton's proposed 'protolanguage' falls somewhere in the middle of this succession. In addition to the by-now accepted evidence from language learning, language disorders, and ape language experiments, modern languages provide evidence of these stages of evolution through the presence of detectable 'fossils' in vocabulary and grammar.

Journal Article↗

PubMed2003

Event-related potentials associated with second language learning in children.

OBJECTIVE: In this study, we investigated learning-related changes in auditory event-related potentials (ERPs) of Finnish-speaking 3-6-year-old children caused by learning French language. METHODS: Using an oddball paradigm, ERPs to sounds of French language were recorded in the two groups of healthy children: those who were learning French (experimental group) and those who were not learning any foreign language (control peers). RESULTS: When the children from the experimental group were exposed to the foreign language, they automatically developed French-specific memory traces that helped them to discriminate, categorize, and pronounce utterances of the new language as indicated by the mismatch negativity (MMN) component of the ERPs in a previous study. We found that the learning process was also reflected by changes in P3a and late difference negativity (LDN) responses. Unlike MMN and P3a, the LDN has been discovered relatively recently and its functional role remains unclear. Similarly, as the MMN magnitude increased during the learning process, an increase of the P3a (known to reflect the involuntary attention switching toward deviant stimuli) and LDN amplitudes was observed. The ERPs of the control peers did not change significantly over the test period. CONCLUSIONS: When phonemes of a foreign language are learned, this process is accompanied with the increase in the MMN, P3a, and LDN amplitudes in children. Though the functional significance of LDN remains to be further investigated, our results support its possible link to reorienting processes following distraction.

Acoustic Stimulation↗