Erratum to “Altered baseline brain activity in children with ADHD revealed by resting-state functional MRI” [Brain Develop 29 (2) (2007) 83–91]

Local synchronization and amplitude of the fluctuation of spontaneous brain activity in attention-deficit/hyperactivity disorder: a resting-state fMRI study

“…It has been used to differentiate two resting conditions [7] and differentiate patients with epilepsy from normal controls [8] . During the resting state, regions exhibiting higher ReHo [3] and ALFF [6,7] than other regions are in line with the location of the default mode network and have the highest metabolic rate as measured by positron emission tomography. These two methods have already been used to explore the functional abnormalities in many brain disorders such as Alzheimer's disease [9,10] and schizophrenia [11,12] .…”

“…Individual ALFF maps were calculated as described previously [6] . The filtered time-courses were transformed into the frequency domain by a fast Fourier transform, so the power spectrum was acquired.…”

“…The data used were part of the dataset analyzed by Cao et al [13] , partly overlapped with the datasets analyzed by Zang et al [6] and Tian et al [14] , and were the same as the dataset of Cao et al [15] . Patients were recruited from the Outpatients Department of Peking University Institute of Mental Health, while the controls were recruited from nearby schools.…”

“…Studies in patients with epilepsy reveal regions exhibiting increased ReHo, in line with the hypothesis of increased local synchronization of epileptic discharges [4,5] . ALFF measures the amplitude of fl uctuation of individual voxels [6] . It has been used to differentiate two resting conditions [7] and differentiate patients with epilepsy from normal controls [8] .…”

“…Cao et al [13] used a ReHo approach with 29 ADHD boys and 27 matched controls and found that the ADHD group exhibited decreased ReHo in the fronto-striato-cerebellar circuit and increased ReHo mainly in the occipital cortex, relative to the controls. Using ALFF on a smaller sample, Zang et al [6] from the same research group found that, compared to controls (n = 12), boys with ADHD (n = 13) showed decreased ALFF in fronto-cerebellar regions as well as increased ALFF in more widely-distributed areas including the anterior cingulate cortex (ACC), sensorimotor cortex, temporal cortex, and brainstem. It seems that the ReHo and ALFF results of the two studies are complementary.…”