Naming difficulties in alexia with agraphia for kanji after a left posterior inferior temporal lesion.

The case is described of a patient with alexia and agraphia for kanji, and severe anomia after a subcortical haemorrhage in the left posterior inferior temporal area. Magnetic resonance imaging at four months after onset showed a lesion in the inferior temporal and fusiform gyri, extending from the temporo-occipital junction toward the anterior third of the temporal lobe. Comparison with other reported cases of alexia with agraphia and anomia made it clear that when accompanied by severe anomia, the lesions extended either forward to the anterior part of the middle temporal gyrus or medially to the parahippocampal gyrus. It is suggested that the disconnection of association fibres between the parahippocampal, fusiform, middle, and inferior temporal gyri, especially between the parahippocampal gyrus and the other temporal gyri, or the cortical damage to the posterior part of these gyri is essential for the production of anomia.

[1]  Makoto Iwata,et al.  Kanji versus Kananeuropsychological correlates of the Japanese writing system , 1984, Trends in Neurosciences.

[2]  H. Tsukagoshi,et al.  Pure agraphia of kanji due to thrombosis of the Labbé vein. , 1990, Journal of neurology, neurosurgery, and psychiatry.

[3]  [Alexia with agraphia produced by localized infarction in the inferior posterior region of the left temporal lobe]. , 1986, No to shinkei = Brain and nerve.

[4]  M. Mesulam,et al.  Slowly progressive aphasia without generalized dementia , 1982, Annals of neurology.

[5]  J. Marshall,et al.  On psycholinguistic classifications of the acquired dyslexias , 1981 .

[6]  L. Squire,et al.  Memory: brain systems and behavior , 1988, Trends in Neurosciences.

[7]  M. Sugishita,et al.  Lexical agraphia in the Japanese language. Pure agraphia for Kanji due to left posteroinferior temporal lesions. , 1989, Brain : a journal of neurology.

[8]  N. Graff-Radford,et al.  Non-haemorrhagic infarction of the thalamus: behavioral, anatomic, and physiologic correlates , 1996 .

[9]  N. Takahashi,et al.  Alexia with agraphia of kanji (Japanese morphograms). , 1987, Journal of neurology, neurosurgery, and psychiatry.

[10]  A R Damasio,et al.  Aphasia with nonhemorrhagic lesions in the basal ganglia and internal capsule. , 1982, Archives of neurology.

[11]  D. Benson,et al.  Neurologic Correlates of Anomia , 1979 .

[12]  R. Ohtomo,et al.  Pure alexia in Japanese and agraphia without alexia in kanji. The ability dissociation between reading and writing in kanji vs kana. , 1988, Archives of neurology.