Boys with attention-deficit/hyperactivity disorder perform wider and fewer finger tapping than typically developing boys – Peer comparisons and the effects of methylphenidate from an exploratory perspective

Author(s):  
Takashi Enokizono ◽  
Tatsuyuki Ohto ◽  
Mai Tanaka ◽  
Kazushi Maruo ◽  
Tomohiko Mizuguchi ◽  
...  
2016 ◽  
Vol 46 (12) ◽  
pp. 2561-2569 ◽  
Author(s):  
V. A. Pironti ◽  
M.-C. Lai ◽  
S. Morein-Zamir ◽  
U. Müller ◽  
E. T. Bullmore ◽  
...  

BackgroundLittle is known about time perception, its putative role as cognitive endophenotype, and its neuroanatomical underpinnings in adults with attention deficit hyperactivity disorder (ADHD).MethodTwenty adults with ADHD, 20 unaffected first-degree relatives and 20 typically developing controls matched for age and gender undertook structural magnetic resonance imaging scans. Voxel-based morphometry with DARTEL was performed to obtain regional grey-matter volumes. Temporal processing was investigated as a putative cognitive endophenotype using a temporal reproduction paradigm. General linear modelling was employed to examine the relationship between temporal reproduction performances and grey-matter volumes.ResultsADHD participants were impaired in temporal reproduction and unaffected first-degree relatives performed in between their ADHD probands and typically developing controls. Increased grey-matter volume in the cerebellum was associated with poorer temporal reproduction performance.ConclusionsAdults with ADHD are impaired in time reproduction. Performances of the unaffected first-degree relatives are in between ADHD relatives and controls, suggesting that time reproduction might be a cognitive endophenotype for adult ADHD. The cerebellum is involved in time reproduction and might play a role in driving time performances.


Dyslexia ◽  
2004 ◽  
Vol 10 (4) ◽  
pp. 299-315 ◽  
Author(s):  
Margaret C. Tiffin-Richards ◽  
Marcus Hasselhorn ◽  
Michael L. Richards ◽  
Tobias Banaschewski ◽  
Aribert Rothenberger

2021 ◽  
Vol 37 (1) ◽  
Author(s):  
Amira Salah Lotfy ◽  
Mohammed El Sayed Darwish ◽  
Ehab Sayed Ramadan ◽  
Rania Makram Sidhom

Abstract Background Attention-deficit/hyperactivity disorder (ADHD) is a brain disorder marked by an ongoing pattern of inattention and/or hyperactivity-impulsivity that interferes with functioning or development. Although children with ADHD made much more spelling errors, they had a distinct pattern of letter insertions, replacements, transpositions, and omissions. This mistake type is sometimes referred to as graphemic buffer errors, and it is caused by a lack of attention required for motor planning. The aim of study was to assess the incidence of dysgraphia in Arabic language in children with ADHD for better helping, diagnosis and management of those children. Results Ten percent of ADHD children had normal handwriting with no disability, 40% had excellent handwriting with a minimum of disability and 50% of ADHD children showed mild to moderate disability. There were significant differences between ADHD children and control children regarding results of each item on the subtest of handwriting of dysgraphia disability scale (DDS), respecting lines, spacing between words, letter direction, spelling a sentence, and punctuation. Drawing affected in ADHD children. The finger tapping speed was affected in almost ADHD children. Conclusions Dysgraphia highly presents in our sample of ADHD children with poor fine motor skills in ADHD children than normal children. ADHD children have illegible handwriting, not respecting lines, insufficient space between and within words, multiple spelling errors, and omissions of letters or words. Graphesthesia and stereognosis are affected more in ADHD children than in control children drawing and finger tapping speed affected in ADHD children.


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