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Visual memory as a potential cognitive endophenotype of attention deficit hyperactivity disorder.
1Department of Psychiatry, College of Medicine, National Taiwan University, Taipei, Taiwan.
Psychological Medicine
|July 8, 2011
Summary
Attention deficit hyperactivity disorder (ADHD) is linked to poorer visual memory. Visual memory tasks like DMS and SRM may serve as useful endophenotypes for ADHD, with siblings showing intermediate deficits.
Area of Science:
- Neuroscience
- Psychology
- Genetics
Background:
- Executive functions are potential endophenotypes for attention deficit hyperactivity disorder (ADHD).
- Previous research lacked data on visual memory deficits in ADHD.
- This study investigated visual memory in adolescents with ADHD and their relatives.
Purpose of the Study:
- To assess visual memory function in adolescents diagnosed with ADHD.
- To compare visual memory performance between ADHD probands, unaffected siblings, and controls.
- To determine if visual memory tasks can serve as an endophenotype for ADHD.
Main Methods:
- Utilized the Cambridge Neuropsychological Test Automated Battery (CANTAB) visual memory tasks.
- Included 279 adolescents with ADHD, 108 unaffected siblings, and 173 controls.
- Assessed Delayed Matching to Sample (DMS), Spatial Recognition Memory (SRM), Paired Associates Learning (PAL), and Pattern Recognition Memory (PRM).
Main Results:
- ADHD probands showed significantly lower correct responses and higher error rates in DMS, and lower correct responses in SRM compared to controls.
- Unaffected siblings exhibited intermediate visual memory performance between ADHD probands and controls.
- Lower IQ and methylphenidate treatment were associated with more pronounced visual memory deficits.
Conclusions:
- ADHD is associated with impaired visual memory.
- Visual memory, particularly assessed by DMS and SRM tasks, shows potential as an endophenotype for ADHD.
- Findings support the role of visual memory in the neurobiological underpinnings of ADHD.
Related Concept Videos
01:30Attention-Deficit/Hyperactivity Disorder
Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by persistent inattention, hyperactivity, and impulsivity. It affects approximately 5-8% of children globally, with around 60-70% of cases persisting into adulthood. ADHD has significant implications for educational attainment, social interactions, and occupational success.
Diagnostic Criteria and Symptoms
To diagnose ADHD, symptoms must manifest before age 12 and be evident across multiple settings.
Diagnostic Criteria and Symptoms
To diagnose ADHD, symptoms must manifest before age 12 and be evident across multiple settings.
01:12Visual Agnosia
Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round end"...