Objective: Adults exhibit strong auditory 40 Hz magnetic steady state responses (SSR). Although EEG measured SSR has been studied in children, the developmental course of the magnetic SSR is unknown.
Methods: Sixty-nine healthy subjects ranging in age from 5 to 52 years participated in a magnetoencephalographic (MEG) study.
Objective: Structural and functional abnormalities in the medial temporal lobe, particularly the hippocampus and amygdala, have been described in people with autism. The authors hypothesized that parents of children with a diagnosis of autistic disorder would show similar changes in these structures.
Method: Magnetic resonance imaging scans were performed in 17 biological parents of children with a diagnosis of DSM-IV autistic disorder.
Objective: Schizophrenia has been reported to be associated with altered localization of regions responding to sound in the auditory cortex, suggesting possible cortical reorganization accompanying the disorder, but it is not clear whether such disturbances are present in any primary sensory cortex other than the auditory. This study examines magnetoencephalographic localization of field sources evoked by tactile stimulation generated in area 3b of the primary somatosensory cortex in patients with schizophrenia compared with normal subjects.
Method: A total of 29 subjects participated; 14 were patients with schizophrenia, and 15 were normal comparison subjects.
The structure of the planum temporale is often disturbed in disorders with associated communication problems, particularly in auditory and language processing areas in the brain. We hypothesized that people with autism would have reduced left hemisphere volumes in the planum temporale, a language related brain structure. We performed magnetic resonance imaging scans of 15 adults with autistic disorder and 15 comparison subjects, and measured the volume of gray matter in the planum temporale and Heschl's gyrus (HG) in both hemispheres.
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