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Related Concept Videos

Association Areas of the Cortex01:21

Association Areas of the Cortex

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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:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
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Motor and Sensory Areas of the Cortex01:14

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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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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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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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Somatosensory, Motor, and Association Cortex01:24

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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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Anatomy of the Eyeball01:20

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The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle...
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Related Experiment Video

Updated: Sep 20, 2025

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
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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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Visual Attention in the Prefrontal Cortex.

Julio Martinez-Trujillo1

  • 1Department of Physiology, Pharmacology and Psychiatry, Robarts Research Institute, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada;

Annual Review of Vision Science
|June 9, 2022
PubMed
Summary
This summary is machine-generated.

Voluntary attention, crucial for focusing on relevant information, is guided by signals originating in the prefrontal cortex. These signals modulate visual processing by influencing upstream brain areas.

Keywords:
feature-based attentionfrontal eye fieldsprefrontal cortexprimatesspatial attention

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Primate Visual Processing

Background:

  • Voluntary attention selects relevant stimuli and filters distractors.
  • Neural correlates of attention are found in primate visual streams, notably the prefrontal cortex.
  • The prefrontal cortex plays a key role in directing attention.

Purpose of the Study:

  • To review evidence for prefrontal cortex signals guiding voluntary attention.
  • To explore how these signals modulate visual information processing.
  • To differentiate roles of prefrontal areas in spatial vs. feature-based attention.

Main Methods:

  • Review of existing neuroscientific evidence.
  • Analysis of neural correlates of voluntary visual attention in primates.
  • Examination of prefrontal cortex involvement in attentional allocation.

Main Results:

  • Prefrontal cortex generates signals that guide voluntary attention.
  • These signals modulate upstream visual processing based on behavioral relevance.
  • Specific prefrontal regions (anterior/dorsal to arcuate sulcus, frontal eye fields) guide spatial attention.
  • Other prefrontal regions (anterior/ventral to arcuate sulcus) guide feature-based attention.

Conclusions:

  • The prefrontal cortex is central to voluntary attention.
  • Prefrontal microcircuits support attention through template signals, gating, and connectivity.
  • Understanding prefrontal roles enhances insights into visual attention mechanisms.