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Related Concept Videos

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.
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...
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...
Sensory Modalities01:15

Sensory Modalities

Sensation typically is the process by which the sensory receptors and sense organs detect stimuli from the internal and external environment and transmit this information to the central nervous system for processing.
General senses refer to the broad category of sensory information detected by receptors in the body and can be further grouped into somatic and visceral senses. Somatic sensations include touch, pressure, temperature, and pain and are essential for navigating our environment and...
Auditory Pathway01:15

Auditory Pathway

Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking the...
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.

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Related Experiment Video

Updated: May 15, 2026

Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control
09:37

Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control

Published on: July 5, 2015

Early visual and auditory processing rely on modality-specific attentional resources.

Christian Keitel1, Burkhard Maess, Erich Schröger

  • 1Institut für Psychologie, Universität Leipzig, Seeburgstraße 14-20, 04103 Leipzig, Germany.

Neuroimage
|January 5, 2013
PubMed
Summary
This summary is machine-generated.

This study reveals that attention shifts between senses by reducing processing in the ignored modality, not by boosting the attended one. This supports modality-specific attention resources, not a shared pool.

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Area of Science:

  • Cognitive Neuroscience
  • Sensory Processing

Background:

  • Everyday tasks require selective attention across sensory modalities.
  • The nature of intermodal attention (common vs. modality-specific resources) remains debated.

Purpose of the Study:

  • To investigate whether intermodal attention involves common or modality-specific resources.
  • To examine attentional resource allocation during shifts between bimodal and unimodal attention.

Main Methods:

  • Used frequency-tagged visual and auditory stimuli to elicit steady-state responses (SSRs).
  • Recorded electroencephalography (EEG) and magnetoencephalography (MEG) simultaneously.
  • Analyzed SSR amplitude changes following a shift from bimodal to unimodal attention.

Main Results:

  • Decreased SSR amplitudes in the unattended sensory modality indicated reduced processing.
  • No significant increase in SSR amplitudes was observed in the attended sensory modality.
  • Findings contradict a common-resource model of attention.

Conclusions:

  • Results support a modality-specific resource account for attention.
  • Early cortical processing in visual and auditory systems can be independently modulated by attention.