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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)
Some patients with frontotemporal lobar degeneration (FTLD) have shown the development of painting or musical abilities after the onset of the disease. In this report, we present another emergent ability. A female patient with FTLD showing dense atrophy of the bilateral anterior lobes and a loss of voluntary activity in aspects of daily living, presented(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)
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)
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)
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)
Transient epileptic amnesia (TEA) is characterised by recurrent brief episodes of amnesia and atypical amnesic symptoms, known as long-term anterograde amnesia and dense retrograde amnesia. It has been proposed that an antiepileptic drug (AED) can prevent not only epileptiform activity, but also accelerated forgetting. However, there have been no reports(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)