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Related Concept Videos

Auditory Pathway01:15

Auditory Pathway

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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...
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Auditory Perception01:17

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The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the...
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The sense of smell is achieved through the activities of the olfactory system. It starts when an airborne odorant enters the nasal cavity and reaches olfactory epithelium (OE). The OE is protected by a thin layer of mucus, which also serves the purpose of dissolving more complex compounds into simpler chemical odorants. The size of the OE and the density of sensory neurons varies among species; in humans, the OE is only about 9-10 cm2.
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When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
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Association Areas of the Cortex01:21

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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:
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Perceiving Loudness, Pitch, and Location01:21

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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.
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Related Experiment Video

Updated: Sep 6, 2025

Mapping the After-effects of Theta Burst Stimulation on the Human Auditory Cortex with Functional Imaging
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Auditory Target Detection Enhances Visual Processing and Hippocampal Functional Connectivity.

Roy Moyal1, Hamid B Turker1, Wen-Ming Luh2

  • 1Cognitive Science Program, Department of Psychology, Cornell University, Ithaca, NY, United States.

Frontiers in Psychology
|June 30, 2022
PubMed
Summary
This summary is machine-generated.

Detecting important auditory cues enhances memory for concurrent images by boosting visual processing and connectivity. This attentional boost involves visual cortex, hippocampus, and locus coeruleus activity.

Keywords:
attentional boost effectencodinghippocampuslocus coeruleustemporal selectionvisual processing

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Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • Dividing attention typically impairs performance.
  • Behaviorally relevant stimuli can enhance memory for unrelated concurrent information.
  • Previous research indicates attentional selection boosts visual cortical activity and memory.

Purpose of the Study:

  • Investigate if attentional selection effects are reflected in processing quality and functional connectivity in visual regions and the hippocampus.
  • Examine the neural mechanisms underlying the attentional boost effect.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) study.
  • Participants memorized images while detecting target auditory tones.
  • Analyzed activity, functional connectivity, and multi-voxel pattern classification in response to auditory stimuli (target, distractor, none).

Main Results:

  • Auditory target detection increased ventral visual cortex activity but decreased hippocampal activity.
  • Enhanced functional connectivity between ventral visual cortex and hippocampus observed after target tones.
  • Image category classification accuracy improved in the fusiform and parahippocampal gyri on target trials.
  • Increased locus coeruleus activity and phasic pupil responses correlated with target detection.

Conclusions:

  • Auditory target detection modulates visual processing and memory encoding.
  • A network of cortical and subcortical regions, including the visual cortex, hippocampus, and locus coeruleus, is involved in processing information at behaviorally relevant moments.
  • Findings support the role of noradrenergic influences in the attentional boost effect.