What is dld and its causes
- Created by: laurenmurphysquires
- Created on: 18-01-22 00:16
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- DLD
- What is DLD? Developmental
Language Disorder
(DLD) is proposed to refer to cases of language disorder with no known
differentiating condition (as defined above). Distinguishing these cases is
important when doing research on aetiology,
and
is likely also to have implications for prognosis and intervention.” (P1071)“emerges
in the course of development, rather than being acquired or associated with a
known biomedical cause” (P1071-1072)
Bishop
et al 2017
- distinguishing between DLD and other language disorder •“language disorder’ is
proposed for children who are likely to have language problems enduring into
middle childhood and beyond, with a significant impact on everyday social
interactions or educational progress” (P1070)
- “Differentiating conditions are biomedical conditions in which language disorder occurs as part of a more complex pattern of impairments. This may indicate a specific intervention pathway. We recommend referring to ‘Language disorder associated with X’, where X is the differentiating condition’” Bishop et al 2017
- distinguishing between DLD and other language disorder •“language disorder’ is
proposed for children who are likely to have language problems enduring into
middle childhood and beyond, with a significant impact on everyday social
interactions or educational progress” (P1070)
- Genetic factors •Runs in families
•Between 20% and 63% of children with SLI
have a close relative with language impairments
•0-19% in control children
Leonard
2014•Chromosome 7 point mutation of the FOXP2
Gene•Atypical pattern of inheritance not found
in others with SLI
•Disagreement about phenotype – Now more
commonly characterised as CAS
•Responsible for controlling other genes
rather than direct influence on speech and language
Lai
et al (2001)
- environmental factors •
- more genetic factors
- Co- occurring conditions.. •ADHD •Dyslexia“ Co-occurring disorders are impairments in cognitive, sensori-motor or behavioural domains that can co-occur with DLD and may affect pattern of impairment and response to intervention, unclear.” causal relation to language problems (P1072)Bishop et al 2017
- CAUSES unknown/ unclear but some ideas suggest •Strong genetic influence•Many different sources of genetic
influence
•Different sources of environmental
influence
- Genetic factors •Runs in families
•Between 20% and 63% of children with SLI
have a close relative with language impairments
•0-19% in control children
Leonard
2014•Chromosome 7 point mutation of the FOXP2
Gene•Atypical pattern of inheritance not found
in others with SLI
•Disagreement about phenotype – Now more
commonly characterised as CAS
•Responsible for controlling other genes
rather than direct influence on speech and language
Lai
et al (2001)
- environmental factors •
- more genetic factors
- Genetic factors •Runs in families
•Between 20% and 63% of children with SLI
have a close relative with language impairments
•0-19% in control children
Leonard
2014•Chromosome 7 point mutation of the FOXP2
Gene•Atypical pattern of inheritance not found
in others with SLI
•Disagreement about phenotype – Now more
commonly characterised as CAS
•Responsible for controlling other genes
rather than direct influence on speech and language
Lai
et al (2001)
- What is DLD? Developmental
Language Disorder
(DLD) is proposed to refer to cases of language disorder with no known
differentiating condition (as defined above). Distinguishing these cases is
important when doing research on aetiology,
and
is likely also to have implications for prognosis and intervention.” (P1071)“emerges
in the course of development, rather than being acquired or associated with a
known biomedical cause” (P1071-1072)
Bishop
et al 2017
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