Related Experiment Video
Updated: Jun 25, 2025
11:18
Closed-loop Neuro-robotic Experiments to Test Computational Properties of Neuronal Networks
Published on: March 2, 2015
10.3K
The neuron mixer and its impact on human brain dynamics
Charlotte E Luff1, Robert Peach2, Emma-Jane Mallas3
1Department of Brain Sciences, Imperial College London, London, UK; UK Dementia Research Institute, Imperial College London, London, UK.
Cell Reports
|May 26, 2024
Summary
Neurons act as signal mixers, combining electrical oscillations to create new frequencies. This neural mixing, observed in human brain activity, is linked to cognitive functions like visual attention.
Area of Science:
- Neuroscience
- Computational Neuroscience
- Signal Processing
Background:
- Signal mixers are fundamental in telecommunication, creating new frequencies from input signals for operations like heterodyning.
- Neurons process information through electrical activity, including subthreshold membrane potential oscillations.
Purpose of the Study:
- To investigate whether neurons function as signal mixers.
- To explore the mechanisms and functional implications of neural signal mixing.
Main Methods:
- Ex vivo and in vivo whole-cell recordings in neurons.
- Analysis of human electroencephalogram (EEG) data.
- Investigating the role of voltage-gated ion channels.
Main Results:
- Neurons were found to mix exogenous and endogenous subthreshold oscillations, generating new frequencies.
- Neural mixing was identified as originating from voltage-gated ion channels.
- Human EEG data revealed distinct patterns of local and inter-region mixing.
- Conversion of alpha-beta oscillations to gamma-band oscillations via mixing was associated with visual attention regulation.
Conclusions:
- Neurons exhibit signal mixing properties, analogous to electronic mixers.
- This neural mixing mechanism, dependent on ion channels, contributes to neural computation.
- Signal mixing in the brain is implicated in cognitive functions, particularly visual attention.
More Related Videos
Related Concept Videos
01:22Neurons as Communicators of the Brain
1.2K
Neurons, the fundamental units of the brain and nervous system, function as the primary transmitters of information throughout the body. Their ability to communicate through electrical and chemical signals is vital for every bodily function, from regulating the heartbeat to processing complex thoughts. Each neuron has three main components: the cell body (soma), dendrites, and an axon, each specialized to facilitate swift and efficient neural communication.
Cell Body
The cell body, also known...
Cell Body
The cell body, also known...
1.2K
01:28Neuronal Communication
843
Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...
843
01:25Neural Circuits
1.2K
Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
1.2K
01:29Excitatory and Inhibitory Effects of Neurotransmitters
9.9K
When an action potential reaches the presynaptic axon terminal, it releases neurotransmitters from the neuron into the synaptic cleft at a chemical synapse. The released neurotransmitter can be excitatory or inhibitory. The critical criteria commonly used to determine whether a molecule is a neurotransmitter at a chemical synapse are the molecule's presence in the presynaptic neuron. Second, its release is in response to strong presynaptic depolarization. And lastly, the presence of...
9.9K
01:01Neuroplasticity
328
Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.
328
02:47The Synapse
124.8K
Neurons communicate with one another by passing on their electrical signals to other neurons. A synapse is the location where two neurons meet to exchange signals. At the synapse, the neuron that sends the signal is called the presynaptic cell, while the neuron that receives the message is called the postsynaptic cell. Note that most neurons can be both presynaptic and postsynaptic, as they both transmit and receive information.
124.8K