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Internal Medicine (Tokyo, Japan) 2017We herein report a 65-year-old man demonstrating dementia with Lewy bodies who first presented with Bálint's syndrome. Two years later, a mild cognitive impairment was...
We herein report a 65-year-old man demonstrating dementia with Lewy bodies who first presented with Bálint's syndrome. Two years later, a mild cognitive impairment was noted. From three years after onset, he developed progressive parkinsonism, visual hallucination, and autonomic dysfunction, in line with the deterioration of the cognitive function. Single photon emission computed tomography with a Tc-ethylcysteinate dimer performed two years after onset revealed hypoperfusion in the restricted area of the bilateral superior parietal lobule, which extended to the lateral occipital cortices within two years. It is suggested that the pathological process can extend from the parietal to occipital lobes.
Topics: Aged; Cognition; Disease Progression; Humans; Lewy Body Disease; Male; Nervous System Diseases; Syndrome; Tomography, Emission-Computed, Single-Photon
PubMed: 28566609
DOI: 10.2169/internalmedicine.56.7005 -
Bulletin of Emergency and Trauma Apr 2016Balint’s syndrome is a rare neurological disorder associated with bilateral parieto-occipital damage which was described by Rezsö Bálint in 1909.The syndrome is...
Balint’s syndrome is a rare neurological disorder associated with bilateral parieto-occipital damage which was described by Rezsö Bálint in 1909.The syndrome is manifested clinically by the presence of a hemispatial negligence. The lesion is usually inside parietooccipital region bilaterally in most cases but may also be compromised angular convolutions, the dorsolateral area of the occipital lobe as the superior parietal lobule. We herein report a 61-year-old man with traumatic brain injury who was diagnosed to have right parieto-occipital contusion in radiologic evaluation. Physical examination was consistent with Balint's syndrome. The patient was followed for 12 months post-injury and received 4-months of outpatient rehabilitation. Patient showed improvement of Balint’s syndrome 8 months after the starts of symptoms.
PubMed: 27331070
DOI: No ID Found -
Frontiers in Human Neuroscience 2013The parietal cortex is a critical interface for attention and integration of multiple sensory signals that can be used for the implementation of motor plans. Many...
The parietal cortex is a critical interface for attention and integration of multiple sensory signals that can be used for the implementation of motor plans. Many neurons in this region exhibit strong attention-, reach-, grasp- or saccade-related activity. Here, we review human lesion studies supporting the critical role of the parietal cortex in saccade planning. Studies of patients with unilateral parietal damage and spatial neglect reveal characteristic spatially lateralized deficits of saccade programming when multiple stimuli compete for attention. However, these patients also show bilateral impairments of saccade initiation and control that are difficult to explain in the context of their lateralized deficits of visual attention. These findings are reminiscent of the deficits of oculomotor control observed in patients with Bálint's syndrome consecutive to bilateral parietal damage. We propose that some oculomotor deficits following parietal damage are compatible with a decisive role of the parietal cortex in saccade planning under conditions of sensory competition, while other deficits reflect disinhibition of low-level structures of the oculomotor network in the absence of top-down parietal modulation.
PubMed: 23759723
DOI: 10.3389/fnhum.2013.00254 -
Behavioural Neurology 2004Following bi-parietal lesions patient AT showed a severe inability to relocate her attention within a visual field which perimetry proved to be near-normal. An...
Following bi-parietal lesions patient AT showed a severe inability to relocate her attention within a visual field which perimetry proved to be near-normal. An experimental approach with tasks testing visuo-spatial attention demonstrated a shrinkage of A.T.'s attentional visual field. With her visual attention narrowed to a kind of functional tunnel vision, the patient exhibited simultanagnosia (Wolpert, 1924), a symptom previously described in 1909 by Balint under the label of Psychic paralysis of "Gaze". In striking contrast AT showed an efficient and effortless perception of complex natural scenes, which, according to recent work in normal subjects, necessitate few if any attentional resources.
Topics: Adult; Agnosia; Attention; Brain Damage, Chronic; Female; Humans; Occipital Lobe; Parietal Lobe; Space Perception; Stroke; Vision Disorders; Visual Fields; Visual Perception
PubMed: 15201489
DOI: 10.1155/2004/836830