Somatosensory disinhibition and frontal alien hand signs following medial frontal damage.
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.
Yamaguchi
Shuhei
S
Department of Neurology, Hematology and Rheumatology, Shimane University School of Medicine, Izumo 639-8501, Japan. yamagu3n@med.shimane-u.ac.jp
Yamagata
Shingo
S
Bokura
Hirokazu
H
Toyoda
Genya
G
Nagai
Atsushi
A
Takahashi
Kazuo
K
Kobayashi
Shotai
S
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