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Related Concept Videos

Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

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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...
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Somatosensory, Motor, and Association Cortex01:24

Somatosensory, Motor, and Association Cortex

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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...
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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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Cerebral Hemispheres01:05

Cerebral Hemispheres

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The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
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Association Areas of the Cortex01:21

Association Areas of the Cortex

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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:
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,...
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Higher Mental Functions of the Brain: Language01:10

Higher Mental Functions of the Brain: Language

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Language is a system of communication that allows the expression of thoughts, ideas, and feelings. The brain processes language in both hemispheres.
Language formation and comprehension take place in the dominant hemisphere. The dominant hemisphere is responsible for understanding the meaning of spoken, written, or sign language, as well as the ability to communicate. For most people, the left hemisphere is the dominant one. The right hemisphere, then, gives tone and emotional context to the...
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Related Experiment Video

Updated: Jun 12, 2025

Stimulating the Lip Motor Cortex with Transcranial Magnetic Stimulation
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Left motor cortex contributes to auditory phonological discrimination.

Maxime Perron1,2, Bernhard Ross1,3, Claude Alain1,2,4,5

  • 1Rotman Research Institute, Baycrest Academy for Research and Education, 3560 Bathurst St, North York, ON M6A 2E1, Canada.

Cerebral Cortex (New York, N.Y. : 1991)
|September 27, 2024
PubMed
Summary
This summary is machine-generated.

The motor cortex is vital for processing speech sounds, aiding in distinguishing similar syllables. However, it does not help compensate for background noise during speech perception.

Keywords:
magnetoencephalographyspeech motorspeech perceptionspeech productionspeech-in-noise

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Speech Perception Research

Background:

  • The role of the articulatory motor system in speech perception is context-dependent.
  • The motor cortex's involvement in phonological processing and speech-in-noise compensation requires further investigation.

Purpose of the Study:

  • To test if the motor cortex is involved in phonological processing.
  • To determine if the motor cortex aids in speech-in-noise compensation.

Main Methods:

  • Magnetoencephalography (MEG) was used to record brain activity in 32 young adults.
  • Participants performed a phonological discrimination task under three different noise conditions.

Main Results:

  • Simultaneous activation of the left ventral primary motor cortex and bilateral posterior-superior temporal gyrus occurred during syllable identification.
  • Activation was greater for phonologically different syllable pairs than identical ones.
  • Phonological differences were processed faster in the motor cortex than in the auditory cortex, irrespective of noise levels.

Conclusions:

  • The ventral primary motor cortex is crucial for phonological processing, not for compensating in noisy environments.
  • Simultaneous activation supports an interactive speech perception model involving auditory and motor regions.
  • The ventral primary motor cortex may employ predictive coding to influence auditory-phonetic processing.