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Related Concept Videos

Association Areas of the Cortex01:21

Association 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,...
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...
Lobes of the Cerebrum01:22

Lobes of the Cerebrum

The cerebral cortex, a critical structure of the brain, is intricately divided into two hemispheres, each consisting of four distinct lobes: occipital, temporal, frontal, and parietal. These lobes function cooperatively to regulate various cognitive and sensory functions, forming the basis of our complex neural capabilities.
Frontal lobe
The frontal lobes, located behind the forehead, are the command center of our brain, controlling personality, intelligence, and voluntary muscle movements.
Lateralization01:28

Lateralization

Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.
Somatosensory, Motor, and Association Cortex01:23

Somatosensory, 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...
Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by identifying...

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Investigating the Effect of Visual Imagery and Learning Shape-Audio Regularities on Bouba and Kiki
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Shape from sound: evidence for a shape operator in the lateral occipital cortex.

Thomas W James1, Ryan A Stevenson, Sunah Kim

  • 1Department of Psychological and Brain Sciences, Indiana University, United States. thwjames@indiana.edu

Neuropsychologia
|March 15, 2011
PubMed
Summary

The lateral occipitotemporal cortex (LO) processes object shape from sound, not just vision or touch. This brain region

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Perception

Background:

  • Cortical functional specialization may be driven by task demands over sensory input modality.
  • The lateral occipitotemporal cortex (LO) is known to process visual and haptic shape information.
  • Auditory cues can also convey information about an object's shape.

Purpose of the Study:

  • To investigate if the lateral occipitotemporal cortex (LO) processes object shape from auditory stimuli.
  • To test the hypothesis that area LO's shape processing is independent of sensory modality.

Main Methods:

  • Auditory stimuli were created from recordings of objects (rods, balls; metal, wood) impacting a surface.
  • Participants performed categorization tasks based on shape, material, or both.
  • Functional magnetic resonance imaging (fMRI) was used to measure brain activity.

Main Results:

  • Area LO showed stronger activation when participants discriminated sounds based on object shape compared to material.
  • This suggests shape selectivity in area LO is not limited to visual or haptic input.

Conclusions:

  • Area LO is involved in auditory shape processing, supporting its role in modality-independent shape analysis.
  • Findings align with a task-based theory of brain specialization, where function is organized around tasks rather than sensory systems.