Related Experiment Video
Updated: May 20, 2026
06:46
Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
Published on: March 18, 2019
Early involvement of prefrontal cortex in visual bottom-up attention
Fumi Katsuki1, Christos Constantinidis
1Department of Neurobiology and Anatomy, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA.
Nature Neuroscience
|July 24, 2012
Summary
Prefrontal cortex neurons, not just the posterior parietal cortex, are involved early in guiding visual attention based on stimulus saliency. This challenges the traditional view of attention guidance mechanisms.
Area of Science:
- Neuroscience
- Cognitive Science
- Visual Attention Research
Background:
- Visual attention is guided by bottom-up saliency and top-down search.
- Posterior parietal cortex (PPC) is linked to bottom-up attention.
- Dorsolateral prefrontal cortex is associated with top-down attention.
Purpose of the Study:
- To investigate the role of prefrontal cortex in bottom-up visual attention.
- To challenge the established view of attention guidance by PPC and prefrontal cortex.
Main Methods:
- Monkeys were trained on a visual detection task.
- Neural activity in PPC and prefrontal cortex was recorded.
- Stimuli were defined by bottom-up saliency, with unknown identity.
Main Results:
- Prefrontal cortex neurons represented salient stimuli as early as PPC neurons.
- Despite shorter visual response latency in PPC than prefrontal cortex.
- This indicates early prefrontal cortex involvement in bottom-up attention.
Conclusions:
- The prefrontal cortex plays an early role in the bottom-up guidance of visual attention.
- Challenges the traditional model of distinct roles for PPC and prefrontal cortex in attention.
Related Concept Videos
01:21Association Areas of the Cortex
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,...
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,...
01:24Vision
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.
01:14Motor 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.
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.
01:20Parallel 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...
01:23Somatosensory, Motor, and Association Cortex
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 the...