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Reconsolidation: Behavioural and Electrophysiological Sequelae of Context and Stress in Human Episodic Memory

von Dr. Jennifer L. Moore

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[1.] Jm/Fragment 068 01 - Diskussion
Zuletzt bearbeitet: 2014-01-12 21:16:05 Graf Isolan
Fragment, Gesichtet, Jm, KomplettPlagiat, SMWFragment, Scanlon et al 2006, Schutzlevel sysop

Typus
KomplettPlagiat
Bearbeiter
Hindemith
Gesichtet
Yes.png
Untersuchte Arbeit:
Seite: 68, Zeilen: 1-14
Quelle: Scanlon et al 2006
Seite(n): 5, Zeilen: 3rd col: 9ff
[Although we] can only provide a brief overview here, a detailed account of the workings of this technique is provided by Nunez (1990).

EEG and ERPs record from the scalp the electrical activity (produced by sinks and sources) of populations of pyramidal cells which form the grey matter of the cortical surface. If a scalp potential records activity due to current sources over an area of less than 1 cm², then the large number of sources may be considered as a single dipole source. Usually, however, scalp potentials are due to larger areas of activity. When a large number of dipoles fire with synchronous activity, and their polarities are the same (i.e. all their positive terminals or sources are adjacent to other positives), as can happen with the densely interconnected pyramidal neurons of the cortical surface, then the group could be considered to form a homogenous dipole layer. However, dipole layers rarely occur with completely homogenous polarities of sinks and sources. The more common occurrence is for the layer to consist of a mixture of polarities of dipoles, in which case the overall potential will reflect the majority of dipole polarities.

Although we can only provide a brief overview here, a detailed account of the workings of this technique is provided by Nunez (1990).

EEG and ERPs record from the scalp the electrical activity (produced by sinks and sources) of populations of pyramidal cells which form the grey matter of the cortical surface. If a scalp potential recorded activity due to current sources over an area of less than 1 cm², then the large number of sources may be considered as a single dipole source. Usually, however, scalp potentials are due to larger areas of activity. When a large number of dipoles fire with synchronous activity, and their polarities are the same (i.e. all their positive terminals or sources are adjacent to other positives), as can happen with the densely interconnected pyramidal neurons of the cortical surface, then the group could be considered to form a homogenous dipole layer. However, dipole layers rarely occur with completely homogenous polarities of sinks and sources. The more common occurrence is for the layer to consist of a mixture of polarities of dipoles, in which case the overall potential will reflect the majority of dipole polarities.

Anmerkungen

A reference to the source is missing

Sichter
(Hindemith) Agrippina1


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