title: Somatosensory disinhibition and frontal alien hand signs following medial frontal damage.
abstract: We report augmentation of somatosensory evoked potentials (SEP) in a patient with frontal alien hand signs after left medial frontal lobe damage. The SEP components occurring later than 30 msec post stimuli were enhanced over the parietal and frontal scalp sites of the lesioned hemisphere. This finding suggests that deficits in inhibitory control of somatosensory processing in parietal and frontal lobes contributes in some way to frontal alien hand signs.
authors.affiliation: Department of Neurology, Hematology and Rheumatology, Shimane University School of Medicine, Izumo 639-8501, Japan. yamagu3n@med.shimane-u.ac.jp
authors.forename: Shuhei
authors.initials: S
authors.lastname: Yamaguchi
authors.forename: Shingo
authors.initials: S
authors.lastname: Yamagata
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Bokura
authors.forename: Genya
authors.initials: G
authors.lastname: Toyoda
authors.forename: Atsushi
authors.initials: A
authors.lastname: Nagai
authors.forename: Kazuo
authors.initials: K
authors.lastname: Takahashi
authors.forename: Shotai
authors.initials: S
authors.lastname: Kobayashi
mesh_terms: D000369:Aged, 80 and over; D004558:Electric Stimulation; D005073:Evoked Potentials, Somatosensory / Q000502:physiology*; D005260:Female; D005625:Frontal Lobe / Q000293:injuries* / Q000502:physiology; D007839:Functional Laterality / Q000502:physiology; D006212:Hallucinations / Q000503:physiopathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D010296:Parietal Lobe / Q000502:physiology