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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...
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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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Visual System01:26

Visual System

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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.
Once through the pupil, the light passes through the lens, a...
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Vision01:24

Vision

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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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Somatosensation01:33

Somatosensation

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The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
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Somatosensory, Motor, and Association Cortex01:24

Somatosensory, Motor, and Association Cortex

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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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Visualization of Cortical Modules in Flattened Mammalian Cortices
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Tool Representations in Human Visual Cortex.

Davide Cortinovis1, Marius V Peelen2, Stefania Bracci1

  • 1University of Trento, Trento, Italy.

Journal of Cognitive Neuroscience
|December 2, 2024
PubMed
Summary
This summary is machine-generated.

The brain visually processes tools using distinct regions in the occipito-temporal cortex (OTC). Lateral OTC handles action properties, while ventral OTC focuses on visual features, supporting tool use.

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Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging
  • Computational Neuroscience

Background:

  • Tools are crucial for daily activities, with specialized brain regions dedicated to their visual processing.
  • Understanding how the brain represents objects with action-related properties is key to explaining tool use.
  • The visual ventral stream, including the occipito-temporal cortex (OTC), is central to object recognition.

Purpose of the Study:

  • To review neuroimaging research on how the visual ventral stream represents action-related objects like tools.
  • To investigate the dissociation between visual and action-related properties in different OTC regions.
  • To explore the utility of artificial neural networks in modeling tool representation.

Main Methods:

  • Synthesis of decades of neuroimaging research findings.
  • Analysis of representational spaces in the ventral and lateral occipito-temporal cortex (OTC).
  • Parallel investigation using artificial neural networks to model object representations.

Main Results:

  • A dissociation exists between ventral and lateral OTC: lateral OTC encodes both visual and action properties, distinguishing tools from other objects, while ventral OTC prioritizes visual features (e.g., texture, material).
  • These OTC regions interact with other brain areas to facilitate object interaction and tool use.
  • Artificial neural networks show potential but struggle to fully capture the action-related dimensions crucial for tool recognition beyond visual features.

Conclusions:

  • Occipito-temporal cortex (OTC) regions represent tools based on behaviorally relevant action codes, integrating visual and action information.
  • Further development of computational models is needed to accurately replicate the action-based representation of tools.
  • Future research should focus on creating models that bridge visual features and action-related properties for a comprehensive understanding of tool representation.