We present a dynamic population game model to capture the behavior of a large population of individuals in presence of an infectious disease or epidemic. Individuals can be in one of five possible infection states at any given time: susceptible, asymptomatic, symptomatic, recovered and unknowingly recovered, and choose whether to opt for vaccination, testing or social activity with a certain degree. We define the evolution of the proportion of agents in each epidemic state, and the notion of best response for agents that maximize long-run discounted expected reward as a function of the current state and policy.
View Article and Find Full Text PDFUnlabelled: Studies investigating amnesic patients have shown the involvement of the medial temporal lobe during working memory (WM) tasks, especially when multiple items or features have to be associated. However, so far, no study has examined the relationship between episodic memory and WM components in patients with amnesia for comprehensive neuropsychological evaluation.
Objective: The objective of this study was to investigate whether the null retention relates to deficits in the episodic buffer (EB) or the central executive (CE) components of WM.
Unlabelled: The logical memory test of the Wechsler Memory Scale is one of the most frequently used standardized tests for assessing verbal memory and consists of two separate short stories each containing 25 idea units. Problems with practice effects arise with re-testing a patient, as these stories may be remembered from previous assessments. Therefore, alternative versions of the test stimuli should be developed to minimize learning effects when repeated testing is required for longitudinal evaluations of patients.
View Article and Find Full Text PDFObjective: To evaluate the neuropsychological profile and health-related quality of life (HRQOL) of adults who had rheumatic fever (RF) during childhood with and without Sydenham's chorea (SC).
Methods: Three groups of patients were assessed: adults who had RF with SC during childhood (SC group), adults who had RF without SC during childhood (RF group), and controls (CT group). A range of neuropsychological tests looked at several cognitive domains.
Unlabelled: Prosopagnosia is a type of visual agnosia with inability to identify faces, usually secondary to brain lesion in associative cortex areas, but there is also a congenital form known as developmental prosopagnosia.
Objectives: To describe a case of developmental prosopagnosia that illustrates the specificity of the pathways for perception of faces in the visual system. Also, we will describe possible mechanisms of recognition used by this patient.
Unlabelled: The neurobehavioral impairments associated with aneurysms of the anterior communicating artery (ACoA) are severe amnesia, executive problems and personality changes. Although most patients achieve a favorable neurological outcome, those cognitive deficits usually prevent return to previous activities and levels of social integration.
Objectives: To report the outcomes of a neuropsychological and behavioral intervention in a 55 year-old man with very severe memory and executive dysfunctions following ACoA aneurysm rupture.
Arq Neuropsiquiatr
September 2000
Even severe amnesic patients usually are able to learn new information using implicit memory strategies. In the present study we describe our experience in the rehabilitation of an amnesic patient who had suffered cerebral anoxia. He was taught to use a computer text editor, enabling him to sheltered work.
View Article and Find Full Text PDFObjective: To present a rehabilitation case study; procedures to improve the performance on daily activities were used by the caregiver.
Patient: Cerebral anoxia due to cardiac arrest. He presented memory deficits for both visual and verbal material, temporal disorientation, abulia, psychomotor slowing and bradypsychism.
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