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Function: strpos
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Objective: Hyperactivity is a core and impairing deficit in the clinical model of attention-deficit/hyperactivity disorder (ADHD). However, the extent to which hyperactivity in ADHD is evoked by cognitively challenging tasks in general or by demands on specific executive functions remains unclear.
Method: A clinically evaluated and carefully phenotyped community-referred sample of 184 children ages 8-13 (M = 10.40, SD = 1.50; 61 girls) with ADHD (n = 119) and without ADHD (neurotypical children and children with psychiatric disorders other than ADHD) were administered multiple, counterbalanced executive (working memory, inhibitory control, set shifting) and nonexecutive tests. Objective measures of gross motor movement (hyperactivity) were obtained using actigraphy.
Results: Using bifactor s-1 modeling, results indicate that children with ADHD demonstrate moderately elevated levels of motor movement relative to non-ADHD children. Additionally, findings indicated that hyperactivity in ADHD reflects the outcome of at least two similarly important factors: (a) a baseline level of elevated motor movement that is independent of environmental demands on their executive and nonexecutive cognitive abilities (d = 0.72); and (b) additional elevations attributable to demands placed on specific executive functions, with working memory and inhibition demands evoking similarly large, differential increases in movement for children with ADHD above and beyond their elevated baselines (Δd = 0.80).
Conclusions: These findings suggests that executive function demands exacerbate, but do not fully explain, hyperactivity in ADHD, and/or there are at least two pathways to hyperactivity in ADHD-hyperactivity caused by environmental demands that challenge their underdeveloped executive functions, and hyperactivity caused by one or more other factors that need future research to identify. (PsycInfo Database Record (c) 2024 APA, all rights reserved).
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http://dx.doi.org/10.1037/neu0000975 | DOI Listing |
Front Psychiatry
December 2024
Department of Neuroscience, University of Padua, Padua, Italy.
Dementia with Lewy bodies (DLB) and its prodromal presentation with mild cognitive impairment is characterized by prominent deficits in attention/executive domains and in visual processing abilities with relative sparing of memory. Neuropsychological research is continuously refining the tools to define more in detail the patterns of relatively preserved and impaired cognitive abilities that help differential diagnosis between DLB and Alzheimer disease (AD). This review summarizes the main studies exploring specific cognitive tasks investigating different visual processing abilities and verbal memory that better differentiate DLB from AD.
View Article and Find Full Text PDFFront Psychiatry
December 2024
Department of Research, Innlandet Hospital Trust, Brumunddal, Norway.
Objective: We aimed to explore how specific cognitive processes, such as attention and executive functions, account for variance in decision-making measured by Iowa Gambling Task (IGT) performance among individuals with schizophrenia spectrum disorders.
Methods: Adults ( = 65, = 25.4) with schizophrenia spectrum disorders participating in a clinical trial (registered at clinicaltrials.
Front Behav Neurosci
December 2024
Department of Civil, Environmental, and Construction Engineering, Texas Tech University, Lubbock, TX, United States.
The Morris Water Maze (MWM) is the most commonly used assay for evaluating learning and memory in laboratory mice. Despite its widespread use, contemporary reviews have highlighted substantial methodological variation in experimental protocols and that the associated testing procedures are acutely (each trial) and chronically (testing across days) stressful; stress impairs attention, memory consolidation and the retrieval of learned information. Moreover, the interpretation of behavior within the MWM is often difficult because of wall hugging, non-spatial swim strategies, floating, and jumping off the escape platform.
View Article and Find Full Text PDFProg Neuropsychopharmacol Biol Psychiatry
December 2024
Chiba University Center for Forensic Mental Health, Chiba 260-8670, Japan; Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China. Electronic address:
Postoperative cognitive dysfunction (POCD) is characterized by a decline in cognitive functions, including memory, attention, and executive abilities, following surgery, with no effective therapeutic drugs currently available. Arketamine, the (R)-enantiomer of ketamine, has shown promise in mitigating cognitive deficits in animal models. In this study, we investigated whether arketamine could ameliorate cognitive deficits in a mouse model of POCD, with a focus on the role of transforming growth factor (TGF)-β1 in its effects.
View Article and Find Full Text PDFVopr Kurortol Fizioter Lech Fiz Kult
December 2024
S.I. Spasokukotsky Moscow Centre for Research and Practice in Medical Rehabilitation, Restorative and Sports Medicine, Moscow, Russia.
Unlabelled: Post-stroke cognitive impairments are widespread and significantly reduce the quality of life and rehabilitation prognosis of patients. Clinical observations show a serious variability of cognitive impairments in patients after acute cerebrovascular accident. Thus, the classification of above mentioned disorders, based on which it would be possible to determine the order of individualization of a cognitive rehabilitation program, is currently not available in literature.
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