Brain Morphology in Developmental Dyslexia and Attention Deficit Disorder/Hyperactivity

Magnetic resonance imaging studies on autism and childhood-onset schizophrenia in children and adolescents – a review

“…For schizophrenia (adults), post mortem studies confirmed the results of the cerebrum (70,71)), corpus striatum (72), amygdalum (70,71)) and thalamus (73). These results differ from the results of the MRI studies on subjects with ADHD (39,67,74–82) and dyslexia (78,83–89).…”

Magnetic resonance imaging studies on autism and childhood-onset schizophrenia in children and adolescents – a review

“…For schizophrenia (adults), post mortem studies confirmed the results of the cerebrum (70,71)), corpus striatum (72), amygdalum (70,71)) and thalamus (73). These results differ from the results of the MRI studies on subjects with ADHD (39,67,74–82) and dyslexia (78,83–89).…”

Planum temporale morphology in children with developmental dyslexia

“…This study supports the findings of Heiervang et al (2000), Hugdahl et al (1998), Hynd et al (1990), and Larsen et al (1990) who found atypical asymmetry of the PT at statistically significant levels in children with dyslexia using structural MRI. This study also corroborates postmortem studies of adults with dyslexia in which symmetrical PT were found (Galaburda & Kemper, 1979; Galaburda, Sherman, Rosen, Aboitiz, & Geschwind, 1985; Humphreys et al, 1990).…”

Contrasting cognitive deficits in attention deficit hyperactivity disorder versus reading disability.

“…Two implications of these results are (a) that the ADHD-only and the RD-onfy groups represent two distinct clinical syn-dromes and (b) that separate cognitive processes underlie ADHD and RD. Although we did not study brain mechanisms directly, our results are consistent with the view that the cognitive deficits of ADHD and RD are mediated by separate brain systems, a view that is consistent with recent explorations of brain structure and blood flow in these two groups (Hynd, Semrud-Clikeman, Lorys, Novey, & Eliopulos, 1990;Zametkin etal., 1990).…”

Magnetic resonance imaging studies on autism and childhood-onset schizophrenia in children and adolescents – a review

“…For schizophrenia (adults), post mortem studies confirmed the results of the cerebrum (70,71)), corpus striatum (72), amygdalum (70,71)) and thalamus (73). These results differ from the results of the MRI studies on subjects with ADHD (39,67,74–82) and dyslexia (78,83–89).…”

Planum temporale morphology in children with developmental dyslexia

“…This study supports the findings of Heiervang et al (2000), Hugdahl et al (1998), Hynd et al (1990), and Larsen et al (1990) who found atypical asymmetry of the PT at statistically significant levels in children with dyslexia using structural MRI. This study also corroborates postmortem studies of adults with dyslexia in which symmetrical PT were found (Galaburda & Kemper, 1979; Galaburda, Sherman, Rosen, Aboitiz, & Geschwind, 1985; Humphreys et al, 1990).…”

Contrasting cognitive deficits in attention deficit hyperactivity disorder versus reading disability.

“…Two implications of these results are (a) that the ADHD-only and the RD-onfy groups represent two distinct clinical syn-dromes and (b) that separate cognitive processes underlie ADHD and RD. Although we did not study brain mechanisms directly, our results are consistent with the view that the cognitive deficits of ADHD and RD are mediated by separate brain systems, a view that is consistent with recent explorations of brain structure and blood flow in these two groups (Hynd, Semrud-Clikeman, Lorys, Novey, & Eliopulos, 1990;Zametkin etal., 1990).…”

Magnetic resonance imaging studies on autism and childhood-onset schizophrenia in children and adolescents – a review

“…For schizophrenia (adults), post mortem studies confirmed the results of the cerebrum (70,71)), corpus striatum (72), amygdalum (70,71)) and thalamus (73). These results differ from the results of the MRI studies on subjects with ADHD (39,67,74–82) and dyslexia (78,83–89).…”

Planum temporale morphology in children with developmental dyslexia

“…This study supports the findings of Heiervang et al (2000), Hugdahl et al (1998), Hynd et al (1990), and Larsen et al (1990) who found atypical asymmetry of the PT at statistically significant levels in children with dyslexia using structural MRI. This study also corroborates postmortem studies of adults with dyslexia in which symmetrical PT were found (Galaburda & Kemper, 1979; Galaburda, Sherman, Rosen, Aboitiz, & Geschwind, 1985; Humphreys et al, 1990).…”

Contrasting cognitive deficits in attention deficit hyperactivity disorder versus reading disability.

“…Two implications of these results are (a) that the ADHD-only and the RD-onfy groups represent two distinct clinical syn-dromes and (b) that separate cognitive processes underlie ADHD and RD. Although we did not study brain mechanisms directly, our results are consistent with the view that the cognitive deficits of ADHD and RD are mediated by separate brain systems, a view that is consistent with recent explorations of brain structure and blood flow in these two groups (Hynd, Semrud-Clikeman, Lorys, Novey, & Eliopulos, 1990;Zametkin etal., 1990).…”