How is Muscle tone Maintained and Regulated in our body? ( Neurophysiology of muscle tone)

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This really helped me understand a lot of neurophysiology!
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The explanation....wow so cool... thank you sir...💫✨

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Amazing!
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Very helpful 😊

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@@PhysioClassroom it did help one of my colleagues, I think it was what he was looking for 😄

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Really very helpful sir ,thanks a lot .Never understood better

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Tnkew sir

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excellent work doctor.

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wonderful sir

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Very nice sir.

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Very nicely explained sir..

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Sir can you please upload a lecture on physiotherapy management of cerebral palsy?

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sir please make a video on neurophysiology of gait

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Hello ,
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It wil b very useful if u prepare videos on palpation of lumbar n thoracic spine

[@PhysioClassroom]

Sure👍. Palpation videos will also be uploaded.
Presently having very busy schedule at my university.
Will try to start palpation series in November 😊🙏

[@alliswell-sg1qu]

Tanku soo much sir.. tank u fr ur response...

[@sarathlectures]

Excellent sir. Can you explain about the role of cerebellum and also the role of Golgi tendon organ in Muscle tone.?

[@PhysioClassroom]

Hello,
Cerebellum helps in maintaining muscle tone by continuously sending efferent impulses to the RAS in response to the proprioceptive inputs that it recieves from the spinocerebellar tracts.
GTO helps in preventing excessive increase in muscle tone (protective function) by activating the inverse stretch reflex.
You can study in detail about this. 😊

[@sarathlectures]

@@PhysioClassroom thank you very much sir..

[@navaneeth_us]

Amazing answer.

[@zahrasaifuddin9313]

Sir can u pls make a video on electromyography

[@dovilestragauskaite6636]

What would cause a permanent contraction of the muscle?

[@priyankavishnoi4614]

Sir type 2nd fibre b hote h or first a fibre b hote h.please tell us about them.

[@PhysioClassroom]

images.app.goo.gl/ABxm6svQYHW8g4be6

[@YouLittleRascal]

A question, although this is an old video don't know if anyone will answer. Youi say the cortical neurons facilitate the activation of muscle tone, y understanding is that cortical neurons are actually inhibitors, which explains why damage to Betz cells causes an increased tone and spasticity. Am I understanding this wrong or are those two different subjects.

[@PhysioClassroom]

Hello,
Thanks for watching Physioclassroom 😊❣️
I would like you to watch all the neurophysiology videos posted on Our channel to have better understanding of the UMN control on the LMN.
In nut shell kindly read more about the following:
1. Pyramidal fibres ( cortical cell and their neurones) are facilitatory not inhibitory as our cortex only gives command in the form of descending motor output signal which helps us to move our body parts.
2. Now this facilitation of the cortex is needed to be controlled and regulated to produce smooth, purposeful Movements.
This is done by the inhibitory/ regulatory functions of extra pyramidal system ( basal ganglia).
3. Read about central hypotonia ( I have also made a video on it. ) In this there is lesion to pure pyramidal system ( extrapyramidal system remains preserved). This leads to over inhibition of the muscle stretch reflex and so no tone develops even after moths of neurological insult.
4. Also kindly note that majority of UMN lesion involve both the pyramidal ( facilitatory) and extrapyramidal ( inhibitory) system and so the resultant hypertonia in UMN lesion results from increase gamman motor firing from the reticular activating system.
5. Just think of the body as a vehilcle with accelerator being the cortex and brakes being the basal ganglia.
6. There is much more I want to add in answer but I strongly beleive all your queries can be answered by watching the following videos on Physioclassroom:
1. Neurophysiology of muscle tone.
2. Mechanism of spasticity development ( why spasticity is velocity dependant?)
3. Mechanism of Rigidity development
4. Mechanism of Central hypotonia
Thanks again for watching Physioclassroom 😊❣️

[@YouLittleRascal]

@@PhysioClassroom Wow!, I truly didn't expect an answer, this is the first video of yours I'm watching and I'll surely check the rest. Hope to keep learning and thank you for your work!

[@shainapinto8816]

pyramidal tract ; is facilitatory to flexors and inhibitors to extensors .. the antigravity muscles r the ones tht help maintain posture and mosty of them r extensor except the biceps ..

[@archanajha5397]

Sir in hyperkinetic movement disorder...... Is their hypertonia or hypotonia....??

[@PhysioClassroom]

Increased rate or intensity of movement cannot be produced without increasing the muscle tone.
There is increased tone in hyperkinetic disorders.

[@kkaran37]

Make video on Trigger point

[@mominarehman6059]

Then in case of UMNL Why tone exaggurated

[@PhysioClassroom]

Hello,
Watch our video on neurophysiology of spasticity to know your answer

[@navaneeth_us]

Sir, is it rubrospinal tract or RETICULOSPINAL TRACT?

[@PhysioClassroom]

What is it that you want clarification about?
Rubrospinal tract originates from mid brain whereas reticulospinal tract originates from reticular formation around pons( MRST) and medulla (LRST).
Their functions also differs and you can read more about it from neurophysiology literature.

[@politicalagenda540]

Hello sir please do reply i have same problem when i do workout i feel muscle tone both side but after finishing my work the next day whatever tension i have created on muscles during workout i feel one side only that muscle tone i did nvc tests of four limbs in that everyone thing is normal.
So now what i do. Suggest me

[@user-hz9es4eu8v]

Role of cerebellum?

[@PhysioClassroom]

Cerebellar projections facilitate the contralateral cortex which in turn facilitates the tone in the contralateral half of the body.
This cerebellum is responsible for maintenance of tone in the ipsilateral half of the body and it's lesion results in hypotonia.

[@user-hz9es4eu8v]

@@PhysioClassroom thanks sir

[@chaimaasalhi9646]

So if we don't have tone we can not move our muscles ??

[@PhysioClassroom]

Even with hypotonia we can move the joints.
For movement to occure , we need intact descending tracts and alpha motor neurone activity.
In absence of Gamma motor neurone activity there will be hypotonia.
This can occur when RAS stimulation is decreased beyond a threshold as in case of cerebellar dysfunctions.

[@chaimaasalhi9646]

@@PhysioClassroom but the movement will be weak , so
For example if hypotonia is in the lower limb patient sway when standing up and may fall , is this correct ?
And thank You doctor for this amazing video

[@PhysioClassroom]

Yes,
You are right that movement will be weak in a hypotonic patient. Thanks for watching Physioclassroom 💕

[@manjularaja6939]

Are the muscle spindle stimulated by stretch or contraction of them
In the stretch reflex video u told they are stretch receptors then how r they stimulated by contraction of muscle spindle by gamma motor neurons

[@PhysioClassroom]

Gamma motor neurones firing makes muscle spine tensed / tight i.e the spindle length remains short and so it is able to pick up change in length ( stretch) very quickly.

[@ibeolaz4605]

Why move hands so much?

[@PhysioClassroom]

Sorry if my hand Movements distracted you🙏

[@ibeolaz4605]

@@PhysioClassroom Video was elaborate sir and I understood the topic.. Thank you.

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