Logan Steele
Research has shed light on how neurons control muscle movement. Previously, researchers had two theories about how neurons in the motor cortex might control movement. One was that these neurons fired in patterns that represent more abstract commands, such as move your arm to the right, and then neurons in different brain areas would translate those instructions to guide the muscle contractions that make the arm move. The other was that the motor cortex neurons would actually send directions to the arm muscles, telling them how to contract. However, in a 2012 Nature paper, Shenoy and his colleagues reported finding that much more is going on: motor cortical neurons work as part of an interconnected circuit to create rhythmic patterns of neural activity.
| Characteristics | Values |
|---|---|
| Neurons in the motor cortex control movement | Neurons fire in patterns that represent more abstract commands, such as "move your arm to the right" |
| Motor cortex neurons send directions to the arm muscles | Neurons tell muscles how to contract |
| Motor cortical neurons work as part of an interconnected circuit | Neurons work as a dynamical system to create rhythmic patterns of neural activity |
| Groups of neurons work together | Neurons fire in complex rhythms to signal muscles about when and where to move |
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What You'll Learn
- Neurons in the motor cortex fire in patterns that represent abstract commands, such as move your arm to the right
- Motor cortex neurons send directions to arm muscles, telling them how to contract
- Groups of neurons work together, firing in complex rhythms to signal muscles about when and where to move
- Motor cortical neurons work as part of an interconnected circuit, creating rhythmic patterns of neural activity
- Studying the brain activity of patients with Lou Gehrig's disease has given researchers insight into how neurons control muscle movement
Neurons in the motor cortex fire in patterns that represent abstract commands, such as move your arm to the right
Neurons in the motor cortex fire in patterns that represent abstract commands, such as 'move your arm to the right'. This is part of a process that allows us to control our muscles.
Previously, researchers had two theories about how neurons in the motor cortex control movement. One was that these neurons fired in patterns that represent more abstract commands, which are then translated by neurons in different brain areas to guide the muscle contractions that make the arm move. The other theory was that the motor cortex neurons would send directions to the arm muscles, telling them how to contract.
However, in a 2012 *Nature* paper, Shenoy and his colleagues reported that much more is going on. They found that motor cortical neurons work as part of an interconnected circuit, or a dynamical system, to create rhythmic patterns of neural activity. These rhythmic patterns are sent to the arm, driving muscle contractions and causing the arm to move.
This was supported by research from Stanford University, which studied the brain activity of two patients with Lou Gehrig's disease (also known as amyotrophic lateral sclerosis, or ALS). The researchers found that groups of neurons work together, firing in complex rhythms to signal muscles about when and where to move. This research could help in the development of better brain-controlled prosthetic devices, such as robotic arms.
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Motor cortex neurons send directions to arm muscles, telling them how to contract
Previously, researchers had two theories about how neurons in the motor cortex control movement. One was that these neurons fired in patterns that represent more abstract commands, such as "move your arm to the right". The other was that the motor cortex neurons would send directions to the arm muscles, telling them how to contract.
However, new research has found that motor cortex neurons work as part of an interconnected circuit, creating rhythmic patterns of neural activity. These rhythmic patterns are sent to the arm, driving muscle contractions and causing the arm to move.
This research has been conducted by studying the brain activity of patients with Lou Gehrig's disease, also known as amyotrophic lateral sclerosis (ALS). ALS damages neurons and causes patients to lose control over their muscles. By understanding how neurons control muscle movement, researchers hope to develop better brain-controlled prosthetic devices, such as robotic arms.
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Groups of neurons work together, firing in complex rhythms to signal muscles about when and where to move
Research has shown that groups of neurons work together, firing in complex rhythms to signal muscles about when and where to move. This is known as a dynamical system.
The study of brain activity in two patients with Lou Gehrig's disease (also known as amyotrophic lateral sclerosis or ALS) has given researchers insight into how neurons control muscle movement. The condition damages neurons and causes patients to lose control over their muscles.
The researchers recorded the motor cortical brain activity of two participants with ALS. The first participant was a 51-year-old woman who retained some movement in her fingers and wrists, and the second was a 54-year-old man who could still move one of his index fingers slightly.
The findings from this study could help in the development of better brain-controlled prosthetic devices, such as robotic arms.
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Motor cortical neurons work as part of an interconnected circuit, creating rhythmic patterns of neural activity
Previously, researchers had two theories about how neurons in the motor cortex might control movement. One was that these neurons fired in patterns that represent more abstract commands, such as "move your arm to the right", and then neurons in different brain areas would translate those instructions to guide the muscle contractions that make the arm move. The other was that the motor cortex neurons would actually send directions to the arm muscles, telling them how to contract. However, research has shown that much more is going on than either of these theories suggest.
Research involving people diagnosed with Lou Gehrig's disease (also known as amyotrophic lateral sclerosis, or ALS) has given researchers insight into how individual neurons control muscle movement in humans. This could help in the development of better brain-controlled prosthetic devices.
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Studying the brain activity of patients with Lou Gehrig's disease has given researchers insight into how neurons control muscle movement
Researchers have found that groups of neurons work together, firing in complex rhythms to signal muscles about when and where to move. This contradicts previous theories that neurons in the motor cortex fired in patterns that represented more abstract commands, such as "move your arm to the right", and then neurons in different brain areas would translate those instructions to guide the muscle contractions that make the arm move. Instead, the new research suggests that motor cortical neurons work as part of an interconnected circuit, creating rhythmic patterns of neural activity that drive muscle contractions and cause the arm to move.
The findings from this study could help in the development of better brain-controlled prosthetic devices, such as robotic arms that better understand and respond to a person's thoughts.
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Frequently asked questions
Neurons in the motor cortex control movement. They do this by firing in patterns that represent more abstract commands, such as "move your arm to the right", which are then translated by neurons in different brain areas to guide the muscle contractions that make the arm move.
The alternative theory is that the motor cortex neurons send directions to the arm muscles, telling them how to contract.
They found that motor cortical neurons work as part of an interconnected circuit to create rhythmic patterns of neural activity.
Groups of neurons fire in complex rhythms to signal muscles about when and where to move.
They drive muscle contractions, causing the arm to move.
