COGNITION

The Logical Process Whereby Elements Of Cognition Are Dissociated From One Another On The Basis Of Evidence From Patients With Brain Lesions



The Logical Process Whereby Elements Of Cognition Are Dissociated From One Another On The Basis Of Evidence From Patients With Brain Lesions

Introduction

The report analyses the logical process whereby elements of cognition are dissociated from one another on the basis of evidence from patients with brain lesions. The concepts of cognitive function and the dissociation and double dissociation, introduced by the neuropsychology, are critical in the current study is the brain healthy because of the effects of it have the lesion. This contribution is to provide, in addition to a sufficient background to the understanding of the functions of the study higher cognitive set as it is today, a summary of the concepts developed by the research of non-cognitive neuropsychology because of the current state of the art.

Discussion

The interpretation process of cognitive dysfunction should be based on three indices: the dissociation disorders, disorders of the association, and the organization and structure errors. The observation of a dissociation disorder is generally considered an interesting case to provide data on the internal structure of cognitive architectures (Akuna 2002 , p. 1312). When cognitive psychology postulates the existence of two systems or subsystems separate and independent (A and B), we can expect that observed in patients for whom the system was selectively injured A and system B remained intact. However, the performance deficit in a task but not in a second does not guarantee that the two subsystems are independent. It may simply be a matter of difficulty of the task. The requirement is usually required to ensure that there are two different processing systems is to find a second patient with the system B is selectively injured, but not the system A. In this case, we speak of double dissociation and are considered by many authors as the scenario to isolate the most reliable systems or cognitive subsystems.

We can distinguish two types of dissociation, whose name is misleading. In the case of the classical dissociation, the patient's performance in a task to fit into the normal range, while those in B a task out of the norm. In the case of strong dissociation, as the patient's performance in task A task B in out of the norm, but performance in the first are much lower than those obtained in the second (Acuna 2002 , p. 1312). We can find double dissociations and double dissociations classic strong.

The combination of disorders, in turn, holds a special place in the study of cognition. We can, for example, imagine a model that postulates the existence of a processing module common to different systems of information processing. We can, then we expect that a functional lesion that affects this module affects performance in all tasks in which it is supposed to intervene. There is one precaution to take (Greene et al. 2002 , p. 121 ). Often brain injury are wide and cover different but ...