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Related Concept Videos

Visual System01:26

Visual System

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...
Vision01:24

Vision

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.
Parallel Processing01:20

Parallel Processing

The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

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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Neural and temporal dynamics underlying visual selection for action.

M van Elk1, H T van Schie, S F W Neggers

  • 1Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen, Nijmegen, The Netherlands. m.vanelk@donders.ru.nl

Journal of Neurophysiology
|June 12, 2010
PubMed
Summary
This summary is machine-generated.

The brain processes visual information differently based on intended actions like grasping versus pointing. This early visual selection for action occurs in specific brain regions.

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Area of Science:

  • Cognitive Neuroscience
  • Neuroscience
  • Visual Perception

Background:

  • The selection for action hypothesis posits that motor intentions modulate visual processing.
  • Understanding how action intentions influence early visual processing is crucial for perception-action coupling.

Purpose of the Study:

  • To investigate the selection for action hypothesis using event-related potentials (ERPs).
  • To determine if action intentions (grasping vs. pointing) affect early visual information processing.

Main Methods:

  • Participants performed either a grasping or pointing action towards a 3D object.
  • Event-related potentials (ERPs) were recorded relative to stimulus onset.
  • Source localization was used to identify the neural origins of observed effects.

Main Results:

  • Grasping intention led to a stronger N1 component compared to pointing.
  • A subsequent selection negativity was observed, localized to the lateral occipital complex.
  • These findings suggest enhanced processing of action-relevant features in ventral stream areas during grasping.

Conclusions:

  • The intention to grasp influences early visual processing, supporting the selection for action hypothesis.
  • Neural evidence indicates that the brain selects action-relevant features in ventral stream areas at an early stage.
  • This study provides new insights into the neural dynamics of perception-action coupling.