Somesthetic disconnection syndromes in patients with callosal lesions.
Somesthetic disconnection syndromes were investigated in relation to the sites of lesions in the corpus callosum in 3 patients with callosal lesions, in order to identify the callosal regions responsible for the interhemispheric transfer of somesthetic information. Cases 1 and 2 with lesions in the posterior truncus exhibited transfer deficits of discriminative sensations between the left and right hands, left-sided tactile anomia and left-sided somesthetic alexia. Case 3 with lesions in the posteroventral part of the posterior truncus showed no signs of somesthetic disconnection syndromes. The results suggest the importance of the anterior and/or dorsal part of the posterior truncus of the corpus callosum for interhemispheric transfer of the discriminative sensations and integrated somesthetic information necessary for tactile naming and somesthetic reading.
Ihori
N
N
Department of Rehabilitation, Kawasaki Cooperative Hospital, Kawasaki, Japan. ihorinami@aol.com
Kawamura
M
M
Fukuzawa
K
K
Kamaki
M
M
D000328:Adult; D000368:Aged; D003337:Corpus Callosum / Q000473:pathology* / Q000503:physiopathology*; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D007596:Joints / Q000294:innervation / Q000503:physiopathology; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D011187:Posture / Q000502:physiology; D011434:Proprioception / Q000502:physiology; D011597:Psychomotor Performance / Q000502:physiology; D011932:Reading; D013003:Somatosensory Cortex / Q000473:pathology* / Q000503:physiopathology*; D020886:Somatosensory Disorders / Q000473:pathology* / Q000503:physiopathology*; D013236:Stereognosis / Q000502:physiology; D013577:Syndrome