Cerebral Asymmetry
Mostrando 13-24 de 30 artigos, teses e dissertações.
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13. "Alien hand" and loss of bimanual coordination after dominant anterior cerebral artery territory infarction.
Three patients with dominant anterior cerebral artery territory infarction demonstrated a severe disturbance of upper limb motor control with impaired bimanual coordination, the "alien hand" sign, and intermanual conflict, in addition to signs of callosal interruption and a transcortical motor aphasia. Recordings of movement-related potentials in one patient
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14. Visual function and perinatal focal cerebral infarction.
AIMS: To evaluate the visual function of infants with perinatal cerebral infarction in whom the site and size of the lesion has been determined using magnetic resonance imaging (MRI). METHODS: Twelve infants with cerebral infarction on MRI were studied with a battery of tests specifically designed to evaluate visual function in infancy. This included tests:
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15. Thalamocortical diaschisis: positron emission tomography in humans.
To investigate further the relations between cortical energy metabolism and neuropsychological impairment after unilateral thalamic lesion, 55 patients underwent positron emission tomography studies of either cortical oxygen consumption or glucose utilisation, including eight repeat studies, at times ranging from 4 days to 98 months after the onset of the le
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16. Age related cognitive decline: a clinical entity? A longitudinal study of cerebral blood flow and memory performance.
OBJECTIVES: To evaluate the changes in regional cerebral blood flow (rCBF) and memory performance in patients with age related cognitive decline (ARCD) who did and did not become demented during a follow up period. METHODS: Twenty four patients with ARCD were recruited from an outpatient memory clinic, of whom 18 were followed up over a mean period of two ye
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17. Human cerebral asymmetries evaluated by computed tomography.
The handedness of seventy-five persons without evidence of neurological disease, was assessed with a standardised test. An analysis of the CT scans of the same persons was performed to determine (1) presence and lateralisation of frontal and occipital "petalia," (2) width of frontal and occipital lobes of each hemisphere, (3) direction of straight sinus devi
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18. Prefrontal cortex and episodic memory retrieval mode
A multistudy analysis of positron emission tomography data identified three right prefrontal and two left prefrontal cortical sites, as well as a region in the anterior cingulate gyrus, where neuronal activity is correlated with the maintenance of episodic memory retrieval mode (REMO), a basic and necessary condition of remembering past experiences. The righ
The National Academy of Sciences.
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19. Cerebral metabolism, anatomy, and cognition in monozygotic twins discordant for dementia of the Alzheimer type.
One pair of monozygotic twins discordant for dementia of the Alzheimer type (DAT) was studied using neuropsychological testing, quantitative x-ray computed tomography (QCT) and magnetic resonance imaging (MRI) of the brain. Cerebral glucose metabolism was measured using positron emission tomography (PET) and 2-[18-F]fluoro-2-deoxy-D-glucose (FDG). The affect
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20. Asymmetry of the aura and pain in migraine.
Patients with classical migraine whose auras included paraesthesiae or numbness in the hands have been reviewed. In 55 of 111 patients the symptoms were on the same side of the body as the headache and in only 20 on the opposite side to the headache. In the remaining 36 patients one or other was incompletely lateralised. Five right handed patients described
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21. Ptosis 1
Twenty-five examples of ptosis occuring with an acute stroke are analysed. Thirteen of these patients had hemispheral infarctions in which ptosis could not be explained by third nerve or sympathetic dysfunction. The ptosis in these `cerebral' cases was bilateral, with other factors such as pyramidal tract damage determining the asymmetry of the ptosis. In so
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22. Lateralisation of cortical function during cognitive tasks: regional cerebral blood flow studies of normal individuals and patients with schizophrenia.
To assess cognitively-related regional asymmetries of brain function, regional cerebral blood flow (rCBF) was determined by the xenon inhalation method while normal subjects performed 10 different tasks and also while they were at rest. In addition to healthy subjects, patients with schizophrenia were also studied. A total of 447 rCBF studies were carried ou
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23. Embryonic stem cells develop into functional dopaminergic neurons after transplantation in a Parkinson rat model
Although implantation of fetal dopamine (DA) neurons can reduce parkinsonism in patients, current methods are rudimentary, and a reliable donor cell source is lacking. We show that transplanting low doses of undifferentiated mouse embryonic stem (ES) cells into the rat striatum results in a proliferation of ES cells into fully differentiated DA neurons. ES c
The National Academy of Sciences.
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24. Contralateral cerebellar hypometabolism: a predictor for stroke outcome?
Contralateral cerebellar hypometabolism (CCH) is a well established remote functional effect of cerebral damage. Because CCH has been reported to be reversible in acute stroke in at least some patients, the value of cerebellar metabolic asymmetry (CbMA; a reflection of the degree of CCH) as a predictor of stroke outcome has been assessed. Measurements of cer