Related Experiment Video
Updated: Feb 15, 2026
09:16
Study Design for Navigated Repetitive Transcranial Magnetic Stimulation for Speech Cortical Mapping
Published on: March 24, 2023
2.0K
Speech Comprehension: Stimulating Discussions at a Cocktail Party.
1Department of Otolaryngology, Washington University School of Medicine, Saint Louis, MO 63110, USA.
Current Biology : CB
|January 28, 2018
Summary
Brain stimulation timed to speech rhythm enhances understanding of conversations in noisy environments. This research shows electrical brain stimulation can improve speech intelligibility.
Area of Science:
- Neuroscience
- Auditory Perception
- Brain-Computer Interfaces
Background:
- Cortical oscillations naturally synchronize with the rhythm of incoming speech.
- Understanding speech in noisy environments is a significant challenge.
Purpose of the Study:
- To investigate if electrical brain stimulation, synchronized with speech rhythm, can enhance speech intelligibility.
- To explore the potential of neural entrainment for improving auditory processing.
Main Methods:
- Participants listened to speech in noisy conditions.
- Electrical brain stimulation was delivered to the cortex, timed precisely with the speech rhythm.
- Speech intelligibility was measured before and after stimulation.
Main Results:
- Electrical stimulation synchronized with speech rhythm significantly improved speech intelligibility in noise.
- The findings suggest a causal link between neural entrainment and improved auditory perception.
Conclusions:
- Rhythmic electrical brain stimulation is a viable method for enhancing speech perception in challenging auditory environments.
- This approach holds promise for developing novel interventions for individuals with hearing impairments.
Related Concept Videos
01:29Stimulants
1.0K
Stimulants are substances that enhance neural activity and elevate dopamine levels in the brain, leading to their highly addictive nature. These drugs include cocaine, amphetamines, MDMA, caffeine, and nicotine, each with distinct mechanisms of action and varied health implications.
Cocaine can be administered via snorting, injection, or smoking. It primarily functions by blocking the reuptake of dopamine, resulting in a euphoric high characterized by an intense sensation of happiness and...
Cocaine can be administered via snorting, injection, or smoking. It primarily functions by blocking the reuptake of dopamine, resulting in a euphoric high characterized by an intense sensation of happiness and...
1.0K
01:20Motor Unit Stimulation
3.9K
When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
3.9K
01:22Muscle Stimulation Frequency
4.7K
The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
4.7K
01:28Action Potential: Phases of Stimulation
12.6K
The action potential is a complex electrical event that occurs in excitable cells, such as neurons and muscle cells. It consists of several distinct phases, each with specific characteristics.
Resting Phase:
In this phase, the cell's membrane is at its resting potential, typically around -70 millivolts (mV) for neurons. Inside the cell, there is a higher concentration of potassium ions (K+) and a lower concentration of sodium ions (Na+). Voltage-gated sodium channels are closed, and...
Resting Phase:
In this phase, the cell's membrane is at its resting potential, typically around -70 millivolts (mV) for neurons. Inside the cell, there is a higher concentration of potassium ions (K+) and a lower concentration of sodium ions (Na+). Voltage-gated sodium channels are closed, and...
12.6K
01:22CNS Stimulants: Psychedelic Agents
854
Hallucinogens, also known as psychedelic drugs, are a class of substances known for their ability to alter perception, cognition, and emotions. Despite their profound effects on the mind, these drugs are non-addictive, setting them apart from many other abused substances. The mechanism of action of these drugs lies in their impact on the 5-HT2A receptor in the brain. Upon activation, this receptor couples to Gq-type G proteins, triggering a cascade that releases intracellular calcium. This...
854
01:24CNS Stimulants: Cocaine, Amphetamines and Cannabinoids
929
CNS stimulants, such as cocaine, amphetamines, and cannabinoids, have varying structures and mechanisms of action that lead to different therapeutic effects and side effects. Cocaine, with its molecular formula C17H21NO4, is a tropane alkaloid and a tertiary amino compound. It has two chemical forms: the hydrochloride salt and the "freebase." The former is in powder form, while the latter involves removing the hydrochloride salt to create a form that can be smoked. Cocaine exerts its...
929