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Hippocampus activation related to 'real-time' processing of visuospatial change
- Source :
- Brain Research, 1652, 204-211. ELSEVIER SCIENCE BV
- Publication Year :
- 2016
-
Abstract
- The delay associated with cerebral processing time implies a lack of real-time representation of changes in the observed environment. To bridge this gap for motor actions in a dynamical environment, the brain uses predictions of the most plausible future reality based on previously provided information. To optimise these predictions, adjustments to actual experiences are necessary. This requires a perceptual memory buffer. In our study we gained more insight how the brain treats (real-time) information by comparing cerebral activations related to judging past-, present- and future locations of a moving ball, respectively. Eighteen healthy subjects made these estimations while fMRI data was obtained. All three conditions evoked bilateral dorsal-parietal and premotor activations, while judgment of the location of the ball at the moment of judgment showed increased bilateral posterior hippocampus activation relative to making both future and past judgments at the one-second time-sale. Since the condition of such 'real-time' judgments implied undistracted observation of the ball's actual movements, the associated hippocampal activation is consistent with the concept that the hippocampus participates in a top-down exerted sensory gating mechanism. In this way, it may play a role in novelty (saliency) detection.
- Subjects :
- 0301 basic medicine
Adult
Male
INFORMATION
SPATIAL ATTENTION
Motion Perception
PREFRONTAL CORTEX
Hippocampal formation
PLACE CELLS
Neuropsychological Tests
Novelty detection
Hippocampus
03 medical and health sciences
Judgment
0302 clinical medicine
WORKING-MEMORY
Memory
medicine
Reaction Time
Humans
NETWORK
Prefrontal cortex
Molecular Biology
COGNITIVE MAPS
Spatial Memory
Visuomotor control
Brain Mapping
Sensory gating
Cognitive map
Working memory
Long-term memory
General Neuroscience
Novelty
MEDIAL TEMPORAL-LOBE
NOVELTY DETECTION
Magnetic Resonance Imaging
030104 developmental biology
medicine.anatomical_structure
LONG-TERM-MEMORY
FMRI
Space Perception
Imagination
Female
Neurology (clinical)
Psychology
030217 neurology & neurosurgery
Photic Stimulation
Developmental Biology
Cognitive psychology
Subjects
Details
- ISSN :
- 18726240 and 00068993
- Volume :
- 1652
- Database :
- OpenAIRE
- Journal :
- Brain research
- Accession number :
- edsair.doi.dedup.....bce2684b43e08996f133b6d3c10b1e64