Alexia with agraphia due to the left posterior inferior temporal lobe lesion—Neuropsychological analysis and its pathogenetic mechanisms
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Cited by (55)
Differential roles of spatial frequency on reading processes for ideograms and phonograms: A high-density ERP study
2012, Neuroscience ResearchCitation Excerpt :Previous studies have proposed distinct neural circuits underlying the reading systems of Kanji and Kana: the ventral orthographic and dorsal phonological routes. This view is supported by the findings from previously mentioned neuropsychological studies and neuroimaging studies with high spatial resolution (Iwata, 1984; Kawahata et al., 1988; Thuy et al., 2004; Sakurai et al., 2008). Similarly, one study reported that inducing transient functional suppression of the left posterior IT cortex using repetitive transcranial magnetic stimulation disturbed the retrieval of visual graphic representations of Kanji (Ueki et al., 2006).
Temporal lobe epilepsy manifesting as alexia with agraphia for kanji
2011, Epilepsy and BehaviorCitation Excerpt :The Japanese writing system includes ideograms (kanji) and syllabograms (kana). In patients with left posteroinferior temporal lesions, reading and writing of ideograms are selectively disturbed [2–7]. We herein describe a patient showing alexia with agraphia for kanji caused by temporal lobe epilepsy.
A combined fMRI study of typed spelling and reading
2011, NeuroImageCitation Excerpt :Further studies need to be carried out which modulate the reading task phonological/semantic demands and then assess the degree to which this modulates activation overlap with spelling in order to confirm this. Many studies have reported that lesions to the left occipitotemporal cortex region are associated with spelling impairments (Kawahata et al., 1988; Rapp and Caramazza, 1997; Rapcsak and Beeson, 2004; Hillis et al., 2005; Tsapkini and Rapp, 2009). Specifically, lesions to this region have been associated with phonologically plausible errors in irregular word spelling, which suggests that it plays a critical role in output orthographic lexical processing (Rapcsak and Beeson, 2004).
Disorders of higher visual processing
2011, Handbook of Clinical NeurologyCitation Excerpt :In this disorder both reading and writing are impaired but oral and auditory language is preserved. Alexia with agraphia is associated with lesions of the left angular gyrus (Dejerine, 1892; Benson, 1985) (Fig. 9.6) or sometimes the adjacent temporoparietal junction (Kawahata and Nagata, 1988; Paquier et al., 2006). It is more likely a linguistic than perceptual disorder: its characteristics suggest a deep dyslexia with deep dysgraphia (see below) (Glosser and Friedman, 1990; Cohen et al., 2000; Sheldon et al., 2008).