IntellectualDiability_13_10_14 Flashcards
What are the different sub-types of autistic spectrum disorders?
Kanner’s syndrome: This subtype of ASC has learning difficulties with little or no languageAsperger’s syndrome: This subtype of ASC has average/high IQ with fairly good languagePervasive developmental disorder-NOS: This subtype of ASC has autistic traits present but not in sufficient level to warrant a diagnosis of ASC
Why has there been an apparent increase in the prevalence of Autistic Spectrum Condition (ASC) in the last 100 years?
1) More inclusive criteria for diagnosis.2) Greater public awareness of the condition.3) Recognition of undiagnosed adults.
What is the current prevalence of ASC?How about Kanner’s and Asperger’s syndromes, and what are the male:female sex ratios of these conditions?On an average GP list, how many people with ASD might there be?
1 in 100 people with ASD.Kanner’s = 1 in 10,000 with a ratio of 4:1 M:F.Asperger’s = 1 in 100 with a ratio of 9:1 M:F.18-24 patients with ASD on average GP list.
Can you define ASC? When did it start?
The consensus is that ASC is a pervasive developmental neurological condition with multimodal causation. It is probable that ASC has been present in society for a very long time; it has only just been noticed and differentiated. The core criteria for making a diagnosis of ASC are deficits in:Social communicationSocial imaginationSocial interactionwith restricted repetitive behaviours.
What has brain imaging shown us about ASC?
Functional MRI scanning has found that the autistic brain operates in a different fashion to the non-autistic brain when presented with social tasks.
What is the test for ASC?
Making the diagnosis is a process of clinical evaluation. There is no specific test that can diagnose ASC.
What is “mind blindness”?
Theory of Mind is the term used to describe the instinctive understanding the other people have their own thoughts and beliefs, different from one’s own. Lack of this is called “mind blindness”.Mind Blindness can result in an apparent lack of empathy; without the ability to predict what others might be thinking or feeling, how is it possible to react with appropriate emotion?
What are the three core features of ASC - the triad of ASC?
1) Lack of social imagination - difficulty in understanding other people’s intentions and behaviours, with inability to predict outcome of interactions outside of routines.2) Difficulty with social communication - problems with understanding and using verbal and non-verbal forms such as tone of voice, body language, and facial expression.3) Problems with social interaction - difficulty in understanding theory of mind, also difficulty managing one’s own thoughts and feelings.
How about repetitive behaviour in ASC?
Early repetitive behaviours may include flapping hands or spinning around (‘stimming’) or show as preferences for ordering objects in a particular way. Some behaviours are a response to sensory issues and will either aid increased perception of pleasurable stimuli or avoidance of unpleasant ones.In older children this may be exhibited as rigid play routines, often copied from TV, where there is little scope for variation from their script.The focus of attention may shift to the collection of information, usually of an ‘object’ nature. This can range from dinosaurs to government statistics or scientific data.
What are the consequences of repetitive behaviour in ASC?
1) Environmental structuring: means ordering possessions in particular ways.2) Time structuring: means having to carry out tasks at a certain time and in a particular sequence.3) Social structuring: means restricted topics of conversation and highly focussed interests allowing prediction of social interactions.
What if changes are imposed on repetitive behaviours in ASC?
Any imposed changes to the patient’s routines or environment may create anxiety and result in potentially difficult behaviours. These behaviours could be caused by problems with executive function in the autistic brain or be a way of regulating stress levels for the patient.
What sort of social difficulties might people with ASC encounter?
Difficulties understanding social rules might lead to inadvertent aggression or being bullied.Failure to make or keep friends might be compensated by solitary activities, but will result in problems later in life with relationships, in the workplace, or social situations in general.”Oddness” may be tolerated, but mind blindness may make someone appear insensitive or rude, as can incorrect understanding of social rules and conventions.
What sort of communication difficulties might be encountered by someone with ASC?
Someone with ASC may have difficulty recognising and using facial expressions, body language, and tone of voice.Direct eye contact may be uncomfortable. Gaze aversion may give the impression of ignoring people.Literal interpretation of words can lead to misunderstanding of idiomatic speech.Alexithymia may also present a problem.
What lis Alexithymia? How might this present/affect someone with ASC?
A lack of words to describe emotion. In ASC this can lead to sudden extreme outburst of emotion; due to inability to communicate how they feel, then becoming overloaded with feelings.
What sort of sensory issues might afflict someone with ASC?
Sensory distortion affects 90% of people with ASC. This is not to be confused with synaesthesia, though this may also be present. Thresholds of pain sensation may be either heightened or reduced. There is an inability to filter out unpleasant stimuli. No more than one or two senses can be processed at a time. As well as the usual ‘five’ senses, vestibular and proprioceptive stimuli need to be considered.Examples include:-Stamping gait to ensure contact with apparently shifting ground-Reaction to fluorescent lights flickering-Electronic beeping being physically painful-Certain clothing materials being extremely uncomfortable to bear
ASC can often be made more difficult to diagnose because they are “masked” by other conditions, such as…?(name 7 - there are 11 listed!)
Epilepsy/seizure disordersLearning disabilities – dyslexia and dyscalculiaAnxiety disordersMood disordersAggressionPsychosisAttention deficit hyperactivity disorderMovement disordersDyspraxiaTourette’s syndromeReceptive/expressive language difficulties
What are some red flags for diagnosis of a child with ASC?
-No babbling by 12 months-No gesturing (pointing, waving, etc.) by 12 months-No single words by 16 months-No two-word spontaneous phrases by 24 months-Any loss of any language or social skills at any age
At what age is it possible to diagnose an ASC?
-NOT before 6 months!-Features can be present and recognised from around 18-24 months.-BUT sometimes it is not picked up until much later, sometimes even not until old age!
Are their questionnaires for helping to screen for ASC?
Yes! They can help with the diagnosis, but not make it alone.NICE recommend the AQ-10 for adults, and the Q-CHAT for children.
What are the advantages and disadvantages of the use of questionnaires in screening for ASC?
Advantage of questionnaires and checklists: A patient, parent or carer can use their test results as a way of introducing the subject of diagnostic assessment at consultation.Disadvantages of questionnaires and checklists: The disadvantages are that they take some time to complete and are not reliable enough to make a diagnosis but they can indicate if further assessment is indicated.
How long will a full assessment for ASC take? Who to refer to if you think one is needed?
A full assessment will take several hours!Children should be referred to CAMHS or paediatric services. May also need SALT assessment.Adults should be referred to a psychologist or psychiatrist with a special interest in autism, or to an autism worker (if available).Private assessments can be carried out by clinical psychologists with a special interest in autism.
If ASC is suspected, what other diagnoses should be excluded?
Hearing lossChildhood psychosisRett’s syndromeChildhood disintegrative disorderFragile X syndromeMetabolic disorders