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Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this...
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Working memory and left medial temporal cortical thickness.

Giuseppe Pastura1, Tadeu Takao Almodovar Kubo2, Maria Angélica Regalla3

  • 1Universidade Federal do Rio de Janeiro, Faculdade de Medicina, Departamento de Pediatria, Rio de Janeiro RJ, Brasil.

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|October 21, 2016
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Summary
This summary is machine-generated.

Attention deficit/hyperactivity disorder (ADHD) in children is linked to impaired working memory. This pilot study found a direct correlation between working memory performance and left medial temporal lobe cortical thickness in ADHD patients.

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Pediatric Neurology

Background:

  • Attention deficit/hyperactivity disorder (ADHD) is a common neurodevelopmental disorder affecting children.
  • Working memory deficits are frequently observed in individuals with ADHD.
  • The relationship between brain structure and cognitive function in ADHD requires further investigation.

Purpose of the Study:

  • To explore the association between working memory capacity and cortical thickness in children diagnosed with ADHD.
  • To conduct a pilot investigation into potential neuroanatomical correlates of working memory deficits in ADHD.
  • To compare cortical thickness and working memory performance between children with ADHD and healthy controls.

Main Methods:

  • A pilot study involving 17 children (aged 7-10) with ADHD and 16 healthy controls.
  • Magnetic resonance imaging (MRI) was used to measure cortical thickness.
  • Working memory was assessed using the Backwards Digit Span subtest of the Wechsler Intelligence Scale for Children.

Main Results:

  • Children with ADHD exhibited significantly lower scores on the Backwards Digit Span, indicating working memory impairment.
  • A statistically significant direct correlation was found between working memory performance and the cortical thickness of the left medial temporal lobe (Spearman's rho = 0.499, p < 0.005).

Conclusions:

  • This study provides initial evidence for a correlation between working memory, as measured by the Backwards Digit Span, and left medial temporal cortical thickness in children.
  • The findings suggest a potential neuroanatomical basis for working memory challenges in ADHD.
  • Further research is warranted to confirm these findings in larger cohorts and explore the implications for ADHD treatment.