Related Experiment Video
Updated: Jan 18, 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
7.5K
Neural dynamics of shifting visual attention between objects and locations in early visual cortex.
S Wehle1, C Gundlach1, M M Müller1
1Experimental Psychology and Methods, Universität Leipzig, Leipzig, Germany.
Summary
This study investigated how location and object attention influence sensory processing using EEG. Results show attention enhances sensory processing earlier and more sustainedly for attended locations within an object.
Area of Science:
- Cognitive Neuroscience
- Visual Attention
- Sensory Processing
Background:
- Location- and object-based attention effects on sensory processing are typically studied separately.
- Understanding the interplay between these attention types is crucial for a complete model of visual perception.
Purpose of the Study:
- To investigate the temporal dynamics of location- and object-based attention.
- To examine sensory enhancement differences for attended versus unattended locations within the same object.
Main Methods:
- Utilized electroencephalography (EEG) and a probabilistic spatial cueing task.
- Measured steady-state visual evoked potentials (SSVEPs) to tag attended locations.
- Compared reaction times and SSVEP amplitudes for cued and uncued locations on single and multiple objects.
Main Results:
- Confirmed longer reaction times for targets on unattended objects compared to unattended locations on the same object.
- Demonstrated significant modulation of SSVEP amplitudes by spatial and object-based attention.
- Revealed earlier SSVEP enhancement and sustained higher amplitudes for cued locations within an object.
Conclusions:
- Object integration involves sequential activation followed by sustained enhanced activation of attended attributes.
- Findings suggest distinct temporal dynamics for location- and object-based attentional effects on sensory processing.
Related Concept Videos
01:24Vision
59.4K
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.
59.4K
01:26Visual System
1.7K
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...
Once through the pupil, the light passes through the lens, a...
1.7K
01:20Parallel Processing
639
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...
639
01:20Anatomy of the Eyeball
9.5K
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...
9.5K
01:21Association Areas of the Cortex
8.9K
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,...
8.9K
01:14Motor and Sensory Areas of the Cortex
7.0K
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....
7.0K