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S V Medvedev

Publications and source records attributed to S V Medvedev.

At least 73 records · Page 4Linked to original sources
PubMedDate not supplied

[Joint PET and electrophysiological research on human thinking activity].

Recent studies of a group of researchers from the Institute of Human Brain (St.-Petersburg), concerning the role of the distributed brain systems in different kinds of perceptual and cognitive acts, are reviewed in this paper. Principally different approaches were used, i. e., electrophysiological (multi-unit record with implanted electrodes) and positron emission tomography (PET). Possibility and benefit of application of the combined analysis of these different sets of data in order to obtain more detailed information on the work of the brain systems are discussed. On the basis of some examples of such a combined analysis the authors conclude that such a combined approach is the optimal way to reach a deeper insight into the anatomical-functional organization of the human brain.

Adolescent↗
PubMedDate not supplied

[Positron-emission tomography in the diagnosis of brain damage in patients in the late period of craniocerebral trauma].

PET data were compared with the results of computerized tomography (CT) and the neurological status of patients. The areas of decreased local cerebral blood flow (LCBF) and reduced local cerebral metabolic glucose rates exceeded those of brain injury shown by CT predominantly in patients with brain posttraumatic cysts. In a group of patients with posttraumatic atrophy documented by CT, PET demonstrated cortical and/or subcortical lesions in most cases, providing objective evidence for neurological symptoms. PET is a useful technique to demonstrate regional brain dysfunction in the presence of morphological integrity as assessed by CT.

Adolescent↗
PubMedDate not supplied

[Positron-emission tomography in intracranial hematomas].

Positron emission tomography by using H2(15)O whose distribution in the brain reflects a genuine cerebral blood flow was made in 5 patients with suspected intracranial hematomas. It was shown that tunicary hematomas might be diagnosed by positron emission tomography. However, examination of cerebral blood flow was not optimal in this abnormality. Computerized tomography remains the basic method for diagnosing intracranial hematomas and positron emission tomography should be used to evaluate cerebral function.

Adult↗