Weber Fechner law and Steven Power law | Sensory physiology lectures | CNS physiology mbbs 1st year

Physiology lecture explains Weber fechner Law and Steven's Power Law of sensory perception with the concept of just noticeable difference,
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The concept of Just Noticeable Difference was given by Weber where he explained that we will be able to perceive the difference in intensity of the stimulus depending on the original strength of the stimulus. For higher strengths of stimulus, a greater chnage in intensity of stimulus is required is required to notice the difference in intensities. Fechner took this concept and tried to explain the percieved intensity of stimulus vis a vis the strength of stimulus. But Fechner law was applicable to only very high and very low intensities of stimulus.
Later this was modified by Steven who gave Power law to explain the percieved intensity of stimulus.
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[@Dr.Shubhrajit]

Being a MBBS student..I will just thank you from the core of my heart for explaining this so clearly. Oh ma'am..!! you just nailed it..!!! Although I am no one to judge..still this are the words of appreciation.🙏🙏🙏

[@PhysiologyOpen]

You made me so so happy. Thank you so much

[@Dr.Shubhrajit]

@@PhysiologyOpen Most welcome ma'am. 🤗

[@derschredder2368]

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[@PhysiologyOpen]

You don’t know how much your comment has touched the idealogy of Physiology Open. Just a small request to share the videos so that it reaches as many people in need as possible. Thank you

[@derschredder2368]

@@PhysiologyOpen don‘t worry, i added the video as source for my uni presentation on Monday ;)

[@PhysiologyOpen]

😊

[@tonyapicos3421]

I'm studying psychology and didn't understand anything in my book or on other channels, but you explained it so well! Thank you, helped a lot!

[@PhysiologyOpen]

Thanks for a great comment. So so happy 😊

[@deepak25bohra75]

Hi. I am a Clinical Psychologist and I have read and rote these concepts since my graduation years. Today after so many years I was able to understand this concept so clearly. Thank you so much for teaching these laws so crisply and clearly.

[@PhysiologyOpen]

Really happy. Thank you so much 😊. Made my day

[@mohdshahabaz6783]

The way you teach in less time with full fledged profoundly amazing content is just fabulous I hope i could find this channel a lil bit earlier

[@PhysiologyOpen]

Thank you so much 😊❤️

[@surabheesatheesh5268]

I scourged youtube fir weber-fechner-steven law without satisfaction, yr video cleared the concepts in a jiffy. Great efforts.Thanks. Need application based videos of these.

[@PhysiologyOpen]

Thank you 😊

[@nehabhardwaj3039]

I hv seen so many videos for the topic..but urs is best

[@PhysiologyOpen]

Thanks 😊❤️

[@victoriasimmons5494]

Thank you. Im less than 2mins into the video and already completely see where you are headed with this teaching :D

[@PhysiologyOpen]

😊

[@desbrown5941]

Thank you so much for this video! I have a test coming up and I was so lost when reading the text book!

[@PhysiologyOpen]

So glad. Keep learning

[@AyaAlef]

This video helped me a lot! Thank you. It's very clear and informative :)

[@PhysiologyOpen]

You're very welcome!

[@akshatadas1222]

Very good. It helped clear my cloud of doubts. 👍

[@PhysiologyOpen]

So glad

[@anjalishukla4689]

I have seen so many videos of the same topic....but finally got my concept cleared here... what an explanation ma'am, u made it so simple to understand.

[@PhysiologyOpen]

Yeah this one took time to simplify. Glad it’s working

[@anjalishukla4689]

@@PhysiologyOpen yes I can understand your efforts very well... good luck 😊

[@Prashantshukla_96]

One of my fav channels in the world.... Thank you mam

[@PhysiologyOpen]

Thank you so much 😊

[@mandysimmons4722]

This was incredibly helpful. Thank you.

[@PhysiologyOpen]

So glad

[@TheSIDHARTH007]

Good explanation madam... great going.. Hope to see you make such more informative videos...

[@PhysiologyOpen]

Thanks

[@sundarbalaji7137]

Thanks a lot maam it's recollect the lectures

[@PhysiologyOpen]

It's my pleasure

[@vanathyvimal8637]

Maam....simply awesome.... crystal clear explanation...thank you very much....

[@PhysiologyOpen]

Thanks you too😀

[@vanathyvimal8637]

Y not mam....luv all your videos....you make tricky concepts easy to understand....

[@abhinavsair851]

Today I am the most happiest... Thank you ma'am

[@PhysiologyOpen]

Always welcome

[@medstunts3168]

the video was very helpful...thanks a lot

[@PhysiologyOpen]

Happy that it helped. Hope you will share it with others too.

[@Norkcam]

I'd like to know how to apply the Fechner's formula. I can't find it in any place, can you recommend me a book, article or video please?

[@PhysiologyOpen]

I read few articles for the video, didnt save the source though. Also, I dont understand the mathematical aspects of it since my subject is physiology.

[@dibyasattwakarmakar]

Thank You , Ma'am

[@PhysiologyOpen]

Thank you too

[@clairec6618]

God bless you

[@aashivyas7426]

Thank you soooo much!!

[@PhysiologyOpen]

Welcome

[@MegaMruno]

Very helpful thank you!

[@PhysiologyOpen]

You are welcome

[@MajidMDWar]

U know what, it is just fukin mind-blowing Thank u

[@PhysiologyOpen]

Glad you loved this..went a lot of work into it

[@anirudh0714]

I just have a doubt. What is the difference between magnitude and intensity in terms of stimulus or are they same? Thank you.

[@PhysiologyOpen]

Same

[@joannad5223]

Wonderful explanation ma'am ❣️

[@PhysiologyOpen]

Thanks a lot 😊

[@annamari7863]

thank you!

[@PhysiologyOpen]

My pleasure

[@aryanmehta4351]

Great video !

[@PhysiologyOpen]

Thanks...keep learning

[@gorabsingh7277]

Thanks for this one mam❤

[@PhysiologyOpen]

My pleasure 😊

[@prakaleo]

How about this formula "dS = k/R dR"? Does that also describe Fechner's Law?

[@PhysiologyOpen]

What’s R

[@aryanmehta4351]

Which book do you recommend for CNS ma'am for 1st year students

[@PhysiologyOpen]

I recommend Understanding Medical Physiology by RL Bijlani....crystal clear concepts in easy to understand language...1st read that...then if possible go for Guyton

[@naivaidhyasharma550]

Incredible explanation!!! Hats off to you

[@PhysiologyOpen]

Thankyou so much

[@nishatanjum4209]

Thank you ma'am 😊

[@PhysiologyOpen]

Most welcome

[@kayshaa]

Thank you so much

[@PhysiologyOpen]

You are welcome

[@nitishdas1402]

Very good lecture

[@PhysiologyOpen]

Thanks and welcome

[@MegaMruno]

If the amount needed to detect a difference increases with initial concentration, how come the perceived intensity changes more rapidly with higher concentration through the power law? Surely the just noticeable difference gets smaller since periceved intensity is changing quickly

[@PhysiologyOpen]

Just noticeable difference keeps on increasing...if for 10gm initial load , JND is 1 gm...for 100 gm initial load...jnd will be 10gm

[@MegaMruno]

@@PhysiologyOpen But doesn't Steven's power law say that the percieved intensity increases more rapidly as the mass increases? If percieved intensity increases more rapidly, how can amount of mass needed to detect a difference also increase?

[@BaruriSaiAvinashPEE]

excellent

[@PhysiologyOpen]

Thanks 😊

[@subbarao5795]

Mam i am unable to understand now also weber fishers law can you explain more good

[@PhysiologyOpen]

In simple terms we know sensory transduction at the level of receptors generates receptor potential which in turn leads to increased frequency of action potentials ...however perception cannot be directly understood from this increased frequency of action potential...this is explained by Weber fechner law ( did I complicate it more?) will be able to explain better if I know your query in the topic

[@dishakalke2132]

Best

[@PhysiologyOpen]

😊

[@vaishakhanusha6102]

❤

[@PhysiologyOpen]

😊

[@ahmadsahil2157]

Still didn't clear this topic as I watched so many videos how to clear cant get the solution

[@PhysiologyOpen]

Watch again, this time sslowly

[@PhysiologyOpen]

Watching same thing after a gap of some time, makes understanding better, as brain processess whatever it has learnt the first time