Neuroscience

How many types of neurons do we need to define?

(Medical Xpress)—A recent perspective paper published in Science has raised some important, and timely, questions regarding neural diversity. The authors, from Columbia, MIT, and New York University, would simply like to ...

Neuroscience

Decoding how brain circuits control behavior

The mouse brain contains roughly 80 million neurons, all packed into a space about the size of a hazelnut. Those cells come in a vast assortment of shapes and sizes, and their connections with one another number in the billions—at ...

Neuroscience

Testing new drugs with 'ALS-on-a-chip'

There is no cure for amyotrophic lateral sclerosis (ALS), a disease that gradually kills off the motor neurons that control muscles and is diagnosed in nearly 6,000 people per year in the United States.

Neuroscience

Brain has natural noise-cancelling circuit

To ensure that a mouse hears the sounds of an approaching cat better than it hears the sounds its own footsteps make, the mouse's brain has a built-in noise-cancelling circuit.

Neuroscience

Paralyzed mice with spinal cord injury made to walk again

Most people with spinal cord injury are paralyzed from the injury site down, even when the cord isn't completely severed. Why don't the spared portions of the spinal cord keep working? Researchers at Boston Children's Hospital ...

Medical research

Human skin cells transformed directly into motor neurons

Scientists working to develop new treatments for neurodegenerative diseases have been stymied by the inability to grow human motor neurons in the lab. Motor neurons drive muscle contractions, and their damage underlies devastating ...

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Motor neuron

In vertebrates, the term motor neuron (or motoneuron) classically applies to neurons located in the central nervous system (or CNS) that project their axons outside the CNS and directly or indirectly control muscles. Motor neuron is often associated with efferent neuron, primary neuron, or alpha motor neurons.

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