I’m so confused that I can’t figure this out. I heard that a motor neuron is a single cell, so does this mean that, for example, I move my foot, that is literally just 1 neuron with a long axon connecting from my foot to brain?
Or is a nerve just a bunch of neurons chained together?
When I look at pictures of neurons it just looks like a big web of wires so it being just 1 cell wouldn’t make sense?
Can someone please explain?
In: 4
Re: your question about motor neurons specifically.
A Motor Unit is all the muscle fibres connected to a single nerve cell. But an actual muscle, like say, the quadriceps in the front of your thigh, will have millions of Motor Units that activate at the same time in order to produce the force needed.
Some motor units are smaller with fewer muscle fibres and are used for your normal day-to-day movements, like walking, while some motor units are large and are only recruited when you need to produce large amounts of force, like jumping
Latest Answers