61. The posterior medial cortex is involved in visual but not in verbal memory encoding processing. Intracerebral recording study

2010 ◽  
Vol 17 (4) ◽  
pp. 597
Author(s):  
K. Herůfková ◽  
P. Jurák ◽  
J. Chládek ◽  
J. Halámek ◽  
I. Rektor
Keyword(s):  
Verbal Memory ◽  
Memory Encoding ◽  
Medial Cortex

The posterior medial cortex is involved in visual but not in verbal memory encoding processing: an intracerebral recording study

2012 ◽  
Vol 120 (3) ◽  
pp. 391-397 ◽  
Author(s):  
K. Štillová ◽  
P. Jurák ◽  
J. Chládek ◽  
J. Halámek ◽  
S. Telecká ◽  
...  
Keyword(s):  
Verbal Memory ◽  
Memory Encoding ◽  
Medial Cortex

scholarly journals Tonic resting-state hubness supports high-frequency activity defined verbal-memory encoding network in epilepsy

2019 ◽  
Author(s):  
Chaitanya Ganne ◽  
Walter Hinds ◽  
James Kragel ◽  
Xiaosong He ◽  
Noah Sideman ◽  
...  
Keyword(s):  
Functional Connectivity ◽  
Verbal Memory ◽  
Resting State ◽  
High Frequency ◽  
Cognitive Networks ◽  
Gamma Activity ◽  
List Type ◽  
Healthy Controls ◽  
Memory Encoding ◽  
Memory Network

AbstractHigh-frequency gamma activity of verbal-memory encoding using invasive-electroencephalogram coupled has laid the foundation for numerous studies testing the integrity of memory in diseased populations. Yet, the functional connectivity characteristics of networks subserving these HFA-memory linkages remains uncertain. By integrating this electrophysiological biomarker of memory encoding from IEEG with resting-state BOLD fluctuations, we estimated the segregation and hubness of HFA-memory regions in drug-resistant epilepsy patients and matched healthy controls. HFA-memory regions express distinctly different hubness compared to neighboring regions in health and in epilepsy, and this hubness was more relevant than segregation in predicting verbal memory encoding. The HFA-memory network comprised regions from both the cognitive control and primary processing networks, validating that effective verbal-memory encoding requires multiple functions, and is not dominated by a central cognitive core. Our results demonstrate a tonic intrinsic set of functional connectivity, which provides the necessary conditions for effective, phasic, task-dependent memory encoding.HighlightsHigh frequency memory activity in IEEG corresponds to specific BOLD changes in resting-state data.HFA-memory regions had lower hubness relative to control brain nodes in both epilepsy patients and healthy controls.HFA-memory network displayed hubness and participation (interaction) values distinct from other cognitive networks.HFA-memory network shared regional membership and interacted with other cognitive networks for successful memory encoding.HFA-memory network hubness predicted both concurrent task (phasic) and baseline (tonic) verbal-memory encoding success.

scholarly journals Recoding between Two Types of STM Representation Revealed by the Dynamics of Memory Search

2012 ◽  
Vol 24 (3) ◽  
pp. 653-663 ◽  
Author(s):  
Marcin Leszczyński ◽  
Nicholas E. Myers ◽  
Elkan G. Akyürek ◽  
Anna Schubö
Keyword(s):  
Visual Attention ◽  
Verbal Memory ◽  
Search Task ◽  
Memory Search ◽  
Memory Encoding ◽  
Short Term ◽  
Verbal Representation ◽  
Verbal Recall ◽  
Retention Intervals ◽  
Stored Information

Visual STM (VSTM) is thought to be related to visual attention in several ways. Attention controls access to VSTM during memory encoding and plays a role in the maintenance of stored information by strengthening memorized content. We investigated the involvement of visual attention in recall from VSTM. In two experiments, we measured electrophysiological markers of attention in a memory search task with varying intervals between VSTM encoding and recall, and so we were able to track recoding of representations in memory. Results confirmed the involvement of attention in VSTM recall. However, the amplitude of the N2pc and N3rs components, which mark orienting of attention and search within VSTM, decreased as a function of delay. Conversely, the amplitude of the P3 and sustained posterior contralateral negativity components increased as a function of delay, effectively the opposite of the N2pc and N3rs modulations. These effects were only observed when verbal memory was not taxed. Thus, the results suggested that gradual recoding from visuospatial orienting of attention into verbal recall mechanisms takes place from short to long retention intervals. Interestingly, recall at longer delays was faster than at short delays, indicating that verbal representation is coupled with faster responses. These results extend the orienting-of-attention hypothesis by including an account of representational recoding during short-term consolidation and its consequences for recall from VSTM.

scholarly journals Neural Correlates of Successful and Unsuccessful Verbal Memory Encoding

2002 ◽  
Vol 80 (3) ◽  
pp. 287-295 ◽  
Author(s):  
Daniel J. Casasanto ◽  
William D.S. Killgore ◽  
Joseph A. Maldjian ◽  
Guila Glosser ◽  
David C. Alsop ◽  
...  
Keyword(s):  
Verbal Memory ◽  
Neural Correlates ◽  
Memory Encoding

scholarly journals Aberrant prefrontal beta oscillations predict episodic memory encoding deficits in schizophrenia

2016 ◽  
Author(s):  
Federica Meconi ◽  
Sarah Anderl-Straub ◽  
Heidelore Raum ◽  
Michael Landgrebe ◽  
Berthold Langguth ◽  
...  
Keyword(s):  
Episodic Memory ◽  
Verbal Memory ◽  
Semantic Processing ◽  
Memory Performance ◽  
Oscillatory Activity ◽  
Healthy Controls ◽  
Memory Encoding ◽  
Brain Oscillations ◽  
Beta Power ◽  
Pattern Similarity

AbstractVerbal episodic memory is one of the core cognitive functions affected in patients suffering from schizophrenia (SZ). Although this verbal memory impairment in SZ is a well-known finding, our understanding about its underlying neurophysiological mechanisms is rather scarce. Here we address this issue by recording brain oscillations during a memory task in a sample of healthy controls and patients suffering from SZ. Brain oscillations represent spectral fingerprints of specific neurocognitive operations and are therefore a promising tool to identify neurocognitive mechanisms that are affected by SZ. Healthy controls showed a prominent suppression of left prefrontal beta oscillatory activity during successful memory formation, which replicates several previous oscillatory memory studies. In contrast, patients failed to exhibit such left prefrontal beta power suppression. Utilizing a new topographical pattern similarity approach, we further demonstrate that the degree of similarity between a patient's beta power decrease to that of the controls reliably predicted memory performance. This relationship between beta power decreases and memory was such that the patients' memory performance improved as they showed a more similar topographical beta desynchronization pattern compared to that of healthy controls. These findings suggest that left prefrontal beta power suppression (or lack thereof) during memory encoding is a possible biomarker for the observed encoding impairments in SZ in verbal memory. This lack of left prefrontal beta power decreases might indicate a specific semantic processing deficit of verbal material in patients with schizophrenia.

Memory retrieval in schizophrenia: Evidence from part-list cuing

2005 ◽  
Vol 11 (3) ◽  
pp. 273-280 ◽  
Author(s):  
JOHANNA KISSLER ◽  
KARL-HEINZ BÄUML
Keyword(s):  
Verbal Memory ◽  
Memory Deficits ◽  
Frontal Lobe Dysfunction ◽  
Memory Encoding ◽  
Neural Basis ◽  
Part List ◽  
Retrieval Inhibition ◽  
Memory Problems ◽  
Neural Origin ◽  
Increased Susceptibility

Schizophrenia patients are known to exhibit episodic verbal memory deficits. Although their neural origin is debated, they have often been compared to the memory problems found in temporal lobe amnesia or frontal lobe dysfunction. Furthermore, it is unclear to what extent such deficits arise at either memory encoding or retrieval. We addressed the issue of retrieval deficits in schizophrenia in a part-list cuing experiment, testing the effect of the presentation of a subset of previously learned material on the retrieval of the remaining items. The part-list cuing procedure generally impairs retrieval but previous work showed that the detrimental effects are more pronounced in amnesic participants than in healthy people, indicating a retrieval deficit under part-list cuing conditions in amnesia. In the present study, schizophrenia patients did not exhibit increased susceptibility to part-list cuing effects and thus showed no increased retrieval inhibition from part-list cuing. Moreover, in part-list cuing, schizophrenia patients did not mirror the pattern found in amnesia, demonstrating a dissociation between amnesia and schizophrenia patients with respect to this particular memory effect. Implications for the neural basis of the part-list cuing effect and of memory disturbances in schizophrenia are discussed. (JINS, 2005, 11, 273–280.)

Neurocognitive correlates of incidental verbal memory encoding: a magnetoencephalographic (MEG) study

NeuroImage ◽  
2005 ◽  
Vol 25 (2) ◽  
pp. 430-443 ◽  
Author(s):  
B.P. Staresina ◽  
H. Bauer ◽  
L. Deecke ◽  
P. Walla
Keyword(s):  
Verbal Memory ◽  
Memory Encoding
Sign in / Sign up

Export Citation Format

Share Document