What do spikes in emgs indicate is it the firing of action...

Name: what do spikes in emgs indicate is it the firing of action potentials is the spike the amplitude and are larger spikes just more action potentials from a single motor unit recruiting more mu 26607
Uploaded: 2022-05-08T21:53:38-08:00
Duration: 4 min 12 s
Channel: Adi S
Description: what do spikes in emgs indicate is it the firing of action potentials is the spike the amplitude and are larger spikes just more action potentials from a single motor unit recruiting more mu 26607

what do spikes in EMGs indicate, is it the firing of action potentials? is the spike the amplitude? and are larger spikes just more action potentials from a single motor unit recruiting more muscle fibers?

Transcript

00:01 So muscle is a very important component of the body and there are several actions that occur or the movements that occurred through the muscles.

00:09 First let's see what is the component that is present in the muscle.

00:14 So what we can see here is the muscle.

00:17 This is the muscle belly further.

00:20 This is what is present inside the muscle.

00:23 So muscle is composed of actin and myosin.

00:26 These are the filaments that are present in present inside the muscle.

00:30 When a muscle contracts what actually happens is first the brain actually elicits signals which further causes the occurrence of action potential represented as ap now this action potential is further travel to upper motor neuron written as umn then reaches the lower motor neuron written as lmn and further this causes the muscles to move or contract causes muscle contraction written as mc.

01:03 Now when the muscle contracts what happens is there is the action of calcium ions.

01:08 This calcium ions actually brings about a mechanical change in tension.

01:14 So the mechanical is represented as mech.

01:17 The mechanical change that occurs in the tension actually leads to depolarization written as dp here.

01:26 Once there is depolarization this depolarization is sensed by emg.

01:33 Now coming to the concept of what is emg.

01:36 Emg stands for electromyography.

01:40 Now electromyography includes sorry we will write it as ele electromiography now electromyography includes inclusion of certain graphs that actually can have the recording of the muscle contraction or muscle movement...

Question

what do spikes in EMGs indicate, is it the firing of action potentials? is the spike the amplitude? and are larger spikes just more action potentials from a single motor unit recruiting more muscle fibers?

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