Download Anomia: neuroanatomical and cognitive correlates by Harold Goodglass, Arthur Wingfield PDF

By Harold Goodglass, Arthur Wingfield

Anomia is the shortcoming to entry spoken names for items, commonly linked to the aged or people with mind harm to the left hemisphere. Anomia bargains the state of the art evaluate of problems of naming, written by way of stated specialists from all over the world, approached from either medical and theoretical viewpoints. Goodglass, identified worldwide for his study in aphasia and speech pathology, edits Read more...

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Extra resources for Anomia: neuroanatomical and cognitive correlates

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Each point represents a state space allowed by the network; in between them is the empty space of patterns of activity that cannot occur. What is also likely in such networks is that there are clusters of points; that is, allowable activity states that are similar to some others (see Figure 5). It is also true of such dynamical systems that patterns of activity that are imposed on the network from outside will ultimately have to settle into the points or clusters that are allowed by the intrinsic network dynamics.

There are at least four questions that must be answered about the relationships between stages: A. Which stages are forwards connected to which other stages? B. Which stages are backwards connected to other stages (feedback connections)? C. What is the temporal sequence of the connections between stages? D. What is the nature of the information that is conveyed between interconnected stages? Forwards Stage Interconnections There is widespread agreement that the stages in Figure 2 have forwards connections, as already indicated in the diagram; that is, information from a stage is passed forwards to the next stage in line.

It has been suggested that all complex systems actually require a parcellation of tasks into subprocesses (Simon, 1962; see also Raff, 1996, pp. 325ff; Riedl, 1978). More recently, neural network theory has provided a more detailed justification for this, suggesting that tasks ultimately become decomposed into subprocesses through dynamic competition in connectionist architectures (Jacobs, Jordan, & Barto, 1991; Polk & Farah, 1995). The logistics of neuronal interconnection may also predict fragmentation of neuronal processing into subsystems (Ringo, 1991).

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