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Many social animals can discriminate between familiar and unfamiliar faces. Orangutans, however, lead a semi-solitary life and spend much of the day alone. As such, they may be less adept at recognizing conspecifics and are a good model for determining how social structure influences the evolution of social cognition such as facial recognition. The present(More)
The anatomic localization of brain functions can be characterized via diffusion tensor imaging in patients with brain tumors and neurological symptoms. The goal of the present study was to evaluate the function of the ventral, arcuate fasciculus (AF) and the superior longitudinal fasciculus (SLF)-related language pathways using these techniques by analyzing(More)
BACKGROUND/AIM Some patients with frontotemporal lobar degeneration (FTLD) have been shown to develop painting abilities after the onset of the disease; however, the reported cases have all been in western countries. The purpose of this report was to investigate whether this phenomenon was unique to western countries. METHODS 2 patients participated in(More)
OBJECTIVES Comparison of preoperative and postoperative neurological functions in patients undergoing resection of brain tumors, in combination with data from diffusion tensor imaging (DTI) studies, can provide direct evidence of anatomical localization of brain function. The goal of the present study was to use these techniques to characterize memory(More)
BACKGROUND/AIMS Several studies have reported specific cognitive deficits of posterior cortical atrophy (PCA) starting in the early stage; however, these characteristics have not been demonstrated as arising in the middle or late stage of the disease. We report a patient with PCA who exhibited atypical symptoms after the middle stage. METHODS We observed(More)
In the process of reading music, the reading of rhythm and pitch might be differentiated, although there is no evidence of this to date. There have been cases of disorders restricted to the reading of pitch, but none in which the disorder has been restricted to the reading of rhythm. We present a case of musical alexia and agraphia with Wernicke's aphasia.(More)
Damage to the left upper parietal lobule causes pure agraphia. However, we experienced a patient who exhibited musical agraphia following such a lesion after the agraphia improved. The patient was a 53-year-old female piano teacher. After surgery, she exhibited agraphia and musical agraphia. There was no expressive amusia, receptive amusia, aphasia, agnosia(More)
Previous studies suggested that perceptual memory as indexed by visual priming is normal in patients with Alzheimer's disease (AD). However, these studies did not specifically test the long-term effects of visual priming, which may differ significantly between Alzheimer's patients and normal subjects. To test this possibility, we examined long-term visual(More)
The mechanisms that underlie the ability to read and write music remain largely unclear compared to those involved in reading and writing language. We had the extremely rare opportunity to study the cerebral localization of the center for reading and writing music in the case of a professional trombonist. During rehearsal immediately before a concert, he(More)