scholarly journals Saccades phase-locked to alpha oscillations in the occipital and medial temporal lobe enhance memory encoding

2017 ◽  
Author(s):  
Tobias Staudigl ◽  
Elisabeth Hartl ◽  
Soheyl Noachtar ◽  
Christian F. Doeller ◽  
Ole Jensen
Keyword(s):  
Eye Movements ◽  
Temporal Lobe ◽  
Visual Information ◽  
Medial Temporal Lobe ◽  
Retrosplenial Cortex ◽  
Neural Oscillations ◽  
Memory Encoding ◽  
Alpha Oscillations ◽  
Memory Mapping ◽  
Efficient Sampling

AbstractEfficient sampling of visual information requires a coordination of eye movements and ongoing brain oscillations. Using intracranial and MEG recordings, we show that saccades are locked to the phase of visual alpha oscillations, and that this coordination supports mnemonic encoding of visual scenes. Furthermore, parahippocampal and retrosplenial cortex involvement in this coordination reflects effective vision-to-memory mapping, highlighting the importance of neural oscillations for the interaction between visual and memory domains.

scholarly journals Saccades are phase-locked to alpha oscillations in the occipital and medial temporal lobe during successful memory encoding

PLoS Biology ◽  
2017 ◽  
Vol 15 (12) ◽  
pp. e2003404 ◽  
Author(s):  
Tobias Staudigl ◽  
Elisabeth Hartl ◽  
Soheyl Noachtar ◽  
Christian F. Doeller ◽  
Ole Jensen
Keyword(s):  
Temporal Lobe ◽  
Medial Temporal Lobe ◽  
Memory Encoding ◽  
Alpha Oscillations

scholarly journals Developmental Differences in Medial Temporal Lobe Function during Memory Encoding

2010 ◽  
Vol 30 (28) ◽  
pp. 9548-9556 ◽  
Author(s):  
S. Ghetti ◽  
D. M. DeMaster ◽  
A. P. Yonelinas ◽  
S. A. Bunge
Keyword(s):  
Temporal Lobe ◽  
Medial Temporal Lobe ◽  
Developmental Differences ◽  
Memory Encoding

Relating Medial Temporal Lobe Volume to Frontal fMRI Activation for Memory Encoding in Older Adults

Cortex ◽  
2005 ◽  
Vol 41 (4) ◽  
pp. 595-602 ◽  
Author(s):  
A ROSEN ◽  
J GABRIELI ◽  
T STOUB ◽  
M PRULL ◽  
R OHARA ◽  
...  
Keyword(s):  
Older Adults ◽  
Temporal Lobe ◽  
Medial Temporal Lobe ◽  
Memory Encoding

scholarly journals Distinct Cortical Anatomy Linked to Subregions of the Medial Temporal Lobe Revealed by Intrinsic Functional Connectivity

2008 ◽  
Vol 100 (1) ◽  
pp. 129-139 ◽  
Author(s):  
Itamar Kahn ◽  
Jessica R. Andrews-Hanna ◽  
Justin L. Vincent ◽  
Abraham Z. Snyder ◽  
Randy L. Buckner
Keyword(s):  
Functional Connectivity ◽  
Temporal Lobe ◽  
Medial Temporal Lobe ◽  
Temporal Cortex ◽  
Memory System ◽  
Retrosplenial Cortex ◽  
The Body ◽  
Parallel Pathways ◽  
Ventral Medial Prefrontal Cortex ◽  
Adjacent Structures

The hippocampus and adjacent cortical structures in the medial temporal lobe (MTL) contribute to memory through interactions with distributed brain areas. Studies of monkey and rodent anatomy suggest that parallel pathways converge on distinct subregions of the MTL. To explore the cortical areas linked to subregions of the MTL in humans, we examined cortico-cortical and hippocampal-cortical correlations using high-resolution, functional connectivity analysis in 100 individuals. MTL seed regions extended along the anterior to posterior axis and included hippocampus and adjacent structures. Results revealed two separate brain pathways that correlated with distinct subregions within the MTL. The body of the hippocampus and posterior parahippocampal cortex correlated with lateral parietal cortex, regions along the posterior midline including posterior cingulate and retrosplenial cortex, and ventral medial prefrontal cortex. By contrast, anterior hippocampus and the perirhinal/entorhinal cortices correlated with distinct regions in the lateral temporal cortex extending into the temporal pole. The present results are largely consistent with known connectivity in the monkey and provide a novel task-independent dissociation of the parallel pathways supporting the MTL memory system in humans. The cortical pathways include regions that have undergone considerable areal expansion in humans, providing insight into how the MTL memory system has evolved to support a diverse array of cognitive domains.

Medial temporal lobe activations during associative memory encoding for arbitrary and semantically related object pairs

2007 ◽  
Vol 1161 ◽  
pp. 46-55 ◽  
Author(s):  
Amélie M. Achim ◽  
Marie-Claude Bertrand ◽  
Alonso Montoya ◽  
Ashok K. Malla ◽  
Martin Lepage
Keyword(s):  
Associative Memory ◽  
Temporal Lobe ◽  
Medial Temporal Lobe ◽  
Memory Encoding ◽  
Related Object

scholarly journals Selectivity of pyramidal cells and interneurons in the human medial temporal lobe

2011 ◽  
Vol 106 (4) ◽  
pp. 1713-1721 ◽  
Author(s):  
Matias J. Ison ◽  
Florian Mormann ◽  
Moran Cerf ◽  
Christof Koch ◽  
Itzhak Fried ◽  
...  
Keyword(s):  
Temporal Lobe ◽  
Visual Information ◽  
Medial Temporal Lobe ◽  
Pyramidal Cells ◽  
Hierarchical Processing ◽  
Plausible Mechanism ◽  
Underlying Mechanisms ◽  
Identification And Characterization

Neurons in the medial temporal lobe (MTL) respond selectively to pictures of specific individuals, objects, and places. However, the underlying mechanisms leading to such degree of stimulus selectivity are largely unknown. A necessary step to move forward in this direction involves the identification and characterization of the different neuron types present in MTL circuitry. We show that putative principal cells recorded in vivo from the human MTL are more selective than putative interneurons. Furthermore, we report that putative hippocampal pyramidal cells exhibit the highest degree of selectivity within the MTL, reflecting the hierarchical processing of visual information. We interpret these differences in selectivity as a plausible mechanism for generating sparse responses.

scholarly journals Studying Memory Encoding to Promote Reliable Engagement of the Medial Temporal Lobe at the Single-Subject Level

PLoS ONE ◽  
2015 ◽  
Vol 10 (3) ◽  
pp. e0119159 ◽  
Author(s):  
Marta Simó ◽  
Pablo Ripollés ◽  
Lluís Fuentemilla ◽  
Lucía Vaquero ◽  
Jordi Bruna ◽  
...  
Keyword(s):  
Temporal Lobe ◽  
Medial Temporal Lobe ◽  
Single Subject ◽  
Memory Encoding

scholarly journals Overlap and separation of remembered and perceived visual information in the human medial temporal lobe

2016 ◽  
Vol 16 (12) ◽  
pp. 1429
Author(s):  
J. Benjamin Hutchinson ◽  
Yida Wang ◽  
Nicholas Turk-Browne
Keyword(s):  
Temporal Lobe ◽  
Visual Information ◽  
Medial Temporal Lobe

Distinct neural correlates of associative working memory and long-term memory encoding in the medial temporal lobe

NeuroImage ◽  
2012 ◽  
Vol 63 (2) ◽  
pp. 989-997 ◽  
Author(s):  
Heiko C. Bergmann ◽  
Mark Rijpkema ◽  
Guillén Fernández ◽  
Roy P.C. Kessels
Keyword(s):  
Working Memory ◽  
Temporal Lobe ◽  
Medial Temporal Lobe ◽  
Neural Correlates ◽  
Long Term Memory ◽  
Memory Encoding ◽  
Term Memory

scholarly journals Episodic memory-related activation in schizophrenia: meta-analysis

2005 ◽  
Vol 187 (6) ◽  
pp. 500-509 ◽  
Author(s):  
Amélie M. Achim ◽  
Martin Lepage
Keyword(s):  
Episodic Memory ◽  
Temporal Lobe ◽  
Medial Temporal Lobe ◽  
Meta Analysis ◽  
Temporal Cortex ◽  
Neural Correlates ◽  
Brain Regions ◽  
Group Differences ◽  
Memory Encoding ◽  
The Brain

BackgroundNumerous studies have examined the neural correlates of episodic memory deficits in schizophrenia, yielding both consistencies and discrepancies in the reported patterns of results.AimsTo identify in schizophrenia the brain regions in which activity is consistently abnormal across imaging studies of memory.MethodData from 18 studies meeting the inclusion criteria were combined using a recently developed quantitative meta-analytic approach.ResultsRegions of consistent differential activation between groups were observed in the left inferior prefrontal cortex, medial temporal cortex bilaterally, left cerebellum, and in other prefrontal and temporal lobe regions. Subsequent analyses explored memory encoding and retrieval separately and identified between-group differences in specific prefrontal and medial temporal lobe regions.ConclusionsBeneath the apparent heterogeneity of published findings on schizophrenia and memory, a consistent and robust pattern of group differences is observed as a function of memory processes.

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