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Related Concept Videos

Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

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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.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
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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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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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Vision01:24

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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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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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Cerebral Hemispheres01:05

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The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
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Related Experiment Video

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Author Spotlight: Insights into Visual Cortex Research Through Wide-View fMRI Mapping
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Author Spotlight: Insights into Visual Cortex Research Through Wide-View fMRI Mapping

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Visual Working Memory in Human Cortex.

Brian Barton1, Alyssa A Brewer1

  • 1Department of Cognitive Sciences, University of California, Irvine, USA.

Psychology (Irvine, Calif.)
|February 17, 2016
PubMed
Summary
This summary is machine-generated.

Visual working memory (VWM) capacity is limited by object number and complexity. Visual field maps in parietal and occipital cortex are involved in representing VWM content.

Keywords:
EEGVisual Field MapsVisual Working MemoryfMRI

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Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging
  • Visual Perception

Background:

  • Visual working memory (VWM) maintains visual information, with capacity limited by object number (3-4) and complexity.
  • Cortical representations of VWM show contralateral organization, mirroring the primary visual system.
  • Previous research suggests VWM involves parietal and occipital regions.

Purpose of the Study:

  • To investigate the role of visual field maps (VFMs) in representing object number and resolution within VWM.
  • To explore how different VFM locations contribute to VWM capacity and content representation.
  • To understand the neural basis of individual differences in VWM.

Main Methods:

  • Utilized electroencephalogram (EEG) with the Contralateral Delay Activity (CDA) paradigm.
  • Employed functional magnetic resonance imaging (fMRI) to identify brain regions involved in VWM.
  • Examined overlapping regions between VWM representations and retinotopically organized VFMs in parietal and occipital cortex.

Main Results:

  • Object number in VWM is associated with inferior intraparietal sulcus (IPS) representations.
  • Object resolution in VWM is linked to superior IPS and lateral occipital complex (LOC) activity.
  • VFMs spanning IPS (IPS0-5) and potentially LOC (LO-1/2, TO-1/2) and early visual areas (V1-hV4) are recruited for VWM.

Conclusions:

  • Visual field maps within parietal and occipital cortices play a crucial role in visual working memory.
  • The organization and recruitment of these maps inform our understanding of VWM capacity and resolution limits.
  • Further research into these maps can elucidate individual differences in VWM performance.