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Related Concept Videos

Working Memory01:24

Working Memory

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Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this...
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The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
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Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
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Association Areas of the Cortex01:21

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Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
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Somatosensory, Motor, and Association Cortex01:23

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The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
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Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
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Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
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Different Cortical Mechanisms for Spatial vs. Feature-Based Attentional Selection in Visual Working Memory.

Anna Heuer1, Anna Schubö1, J D Crawford2

  • 1Experimental and Biological Psychology, Philipps-University Marburg Marburg, Germany.

Frontiers in Human Neuroscience
|September 2, 2016
PubMed
Summary
This summary is machine-generated.

Different brain regions control spatial and feature-based selection in visual working memory (VWM). The supramarginal gyrus aids spatial recall, while the lateral occipital cortex supports feature recall, revealing overlapping attention mechanisms.

Keywords:
attentionfeature-based attentionretrocuespatial attentiontranscranial magnetic stimulationworking memory

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Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • Visual working memory (VWM) capacity is limited, requiring selective attention to maintain relevant information.
  • Previous research shows retroactive memory selection based on location or shape, but the underlying neural mechanisms remain unclear.
  • It's unknown if distinct brain regions specialize in spatial versus feature-based mnemonic attention, analogous to perceptual attention.

Purpose of the Study:

  • To identify human parietal and occipital cortex areas involved in selecting memory content based on spatial or featural cues.
  • To investigate the neural basis of differential selection in VWM.

Main Methods:

  • Utilized transcranial magnetic stimulation (TMS) over specific brain regions in human participants.
  • Assessed the impact of TMS on the selection of remembered objects based on spatial or featural information.

Main Results:

  • TMS over the supramarginal gyrus (SMG) selectively improved spatial selection of memory content.
  • TMS over the lateral occipital cortex (LO) selectively enhanced feature-based selection for remembered objects.
  • These findings indicate distinct cortical involvement in spatial versus feature-based mnemonic selection.

Conclusions:

  • Different cortical regions, SMG for spatial and LO for feature-based selection, are responsible for selecting VWM content.
  • The study suggests overlapping neural mechanisms for attentional control over both external perceptual input and internal mnemonic representations.
  • These findings advance our understanding of how the brain manages limited working memory resources.