Lectures 84, 85: Childhood and ADHD/Autism Flashcards
Symptom domains of ASD (2)
Social/communication deficits, restricted/repetitive behaviors
Social/communication deficits includes…
Social/emotional reciprocity; non verbal communication; maintaining/developing relationships
Restricted, repetitive behaviors includes…
Stereotyped speech; routines; fixated interest; sensory input hyper/hyporeactivity
T/F: Seizures can be seen in ASD?
True!
Besides social-communication deficits and restricted/repetitive behaviors, what else is required for an autism diagnosis?
Symptoms must be present in early childhood and limit/impair everyday functioning
Which is more important/necessary for autism diagnosis: social-communication deficits or restricted/repetitive behaviors?
Social-communication deficits (requires 3 out of 3 symptoms)
How early can an autism diagnosis be made? Advantage?
12 - 18 months; early intervention = better outcome
What is the most important “risk alert” for ASD?
Joint attention: child wants to pay attention to the same thing that you’re paying attention to
What are the behaviors included in joint attention? (3)
Pointing (look at this!), bringing and showing, responding to adult point
Are the rates of autism rising? (3 reasons)
Unlikely: there are broadened diagnostic criteria, younger age of diagnosis, improved sensitivity
Genes or environment more important for development of autism? (heritability %)
Genes! 90%, more than really any other psychiatric conidtion
Environmental factors and autism? (2 examples)
Parental age, toxins
Are there any single genes that cause autism?
Yes: very rare variants accounting for
Besides rare genetic mutations, what other genetic model can account for autism?
Large number of common genetic variations (SNPs)
Genes related to ASD tend to impact…
Glutamate synapse (including post synaptic response)
Potential novel target for ASD based on etiology?
IGF
Symptom buckets for ADHD (2). How many symptoms of each? Relation to subtypes (3)?
Inattention, hyperactive/impulsive; 6; predominantly inattentive, predominantly hyperactive, combined
What symptoms of ADHD often persist with age? Which ones improve?
Cognitive/executive problems; hyperactivity
Neurobiology of ADHD (NE and DA)
NE: enhances relevant signals in prefrontal region; DA suppresses irrelevant signal in prefrontal region
Heritability of ADHD (%)
75%
One structural and one functional difference in ADHD
Smaller prefrontal cortex volume; less efficient processing via decreased activity in ACC
Two reasons to treat ADHD
Minimize core symptoms; alter course of other disorders
Are treatments for ADHD effective?
Yes!
Four simple environmental modifications for ADHD
- Structure environment; 2. Simplify communication; 3. Use external aids/reminders; 4. Pyschosocial interventions (social skill training)
How are methylphenidate and amphetamine similar and different?
Methylphenidate and amphetamine block reuptake, amphetamine also blocks uptake into vesicles and DA release