'Low wavelength not activate cones', this statment is false. In the Video he corrects himself by saying the ligtht low intensity diactivates the cones. The rods have a much higher light sesitivity but the blue cones have a Adsorption Maxima at 420nm while the Rhodopsin is at 500nm. In Average while the Switching from Photopic to scotopic vision the spectral sensitivity shifts fom green to bluegreen also called Purkinje-effect/shift. So blue things appears to be brighter than red stuff.
"Oh man you know what? spiderman movie was so great! I wanna go back in again, and watch it again" 15:48 LMAOOOOOOO #Visual_adaptation Zach you are the B-E-S-T!
Im a first year optom student and this was so helpful in prep for my exam! Thank you! My a level biology teacher reccomended your channel and its amazing I can still find videos here not only covering a level but university content too!
if only i found out about this channel since year 1 med school wasted 6 years now graduated and this helps review for usmle exam, thank you brilliant doc and teacher
Thank you for another amazing video breaking down these complicated things in an understandable and organized way! Love the drawings as well - very helpful :))
Have you ever heard of the McCollough effect The McCollough effect is a phenomenon of human visual perception in which colorless gratings appear colored contingent on the orientation of the gratings. It is an aftereffect requiring a period of induction to produce it
I know you said that the phototransduction for rods and cones is really similar on the phototransduction cascade video, but how does the high amount of light doesn't cause the dissociation of the transducin on cones? Is that why you said the "less sensitive cones turn on"? so more sensitive cones would be turning on as adaptation to bright light occurs?
From what i know , There are about 120 million rods receptor , on each one there are plenty of escotopsin ( rhodopsin ) but these receptors have low threshold ( which means a high sensetivity to light photons ; that's why they can feel the less light in the dark after the adaptation But on the other hand, we have cones which are hugily less in number compared to rods (only 7 millions mainly exist in fovea centralis or macula lutae ) but they have a highly threshold value so they do just work on highly amounts of photons So in day light the rhodopsin is massivly destructed Which means that the rate of its destruction exceeds the rate of its synthesis in liver and retina On the other hand , theoritically only 1 million of the cones respond to the light But at the end The both cascades are the same but it only differs according to the sensetivity of the receptor ( i hope i explained it )
I can't wait for the day when you have a contest for high school students and they give your whiteboard accounts accurately for scholarships. Think what kind of physicians we would have them.
Awesome. Do you have a source you use for your knowledge? Textbook? Neuroscience book? Some books get really detailed like Guyton and Hall. Wondering where you find your information.
He uses BORON and the likes. A personal suggestion-: Try to read GANONG which is a review book of physiology and make notes. You will find some concepts explained in a breath-taking way. Though your comment is 1 year old I doubt my suggestion would be of any help or not.
![Seungmin "그렇게, 천천히, 우리(As we are)" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/kAzmhLHePqU/mqdefault.jpg)
Photoreceptors-
Rods-
Rhodopsin
Retinal sensitivity
Scotopic vision.
Cones-
Photospin
Visual acuity
Colour Vision.
Dark to light adaptation-
Pupil constrict
Bleaching pigment
Rods turns off
Retinal sensitivity decrease
Cones turns on
Colour Vision
5-10 minutes.
Light to dark adaptation-
Pupil dilation
Rhodopsin start accumulating
Retinal sensitivity increase
Rods turn on
Low wavelength not activate cones
20-30 minutes.
Colour blindness
Nyctalopia
Night blindnesses
Retinitis pigmentosum.
Thank you sir
👍
'Low wavelength not activate cones', this statment is false. In the Video he corrects himself by saying the ligtht low intensity diactivates the cones. The rods have a much higher light sesitivity but the blue cones have a Adsorption Maxima at 420nm while the Rhodopsin is at 500nm. In Average while the Switching from Photopic to scotopic vision the spectral sensitivity shifts fom green to bluegreen also called Purkinje-effect/shift. So blue things appears to be brighter than red stuff.
This channel fell from heaven 💙💙
Really I’m so happy because we live in same time ♥️
Now these are the type of people that are meant to do this job!! Thank you so much, taught me so much more than my university professor ❤️
You are my real Professor!!!for all of my med school.i m glad i found this channel in my first year ❤
Wish I had found you at the beginning of this semester.
What would I have done without you man ?
You're simply awesome.🙏
Wow thank you so much, this video helped me get a better idea what my professor was explaining in class. ✔✔👍
I have to tell you I have spent the whole day watching your videos haha, can't believe I only discovered them today
i really appericiate you making this informative video. one of if not the best one i've ever seen on this subject
"Oh man you know what? spiderman movie was so great! I wanna go back in again, and watch it again" 15:48 LMAOOOOOOO #Visual_adaptation
Zach you are the B-E-S-T!
I love it. Excellent drawing and explanation. It draws all the points together that helps me understand the whole process. Very good job!
U teach more than my professors do
I never understood why pupils constrict in bright light before this video. Thanks Zack, stay blessed and continue helping doctors around the world 😍
Finally made sense of my notes my lecturer gave .This is awesome
BROOOOOOOOOOOO!!!!!!!!! This video was the best video in explaining this process. Thank you sooooo much for making it!!!!!!!!!!!!!
I agree!!
Im a first year optom student and this was so helpful in prep for my exam! Thank you! My a level biology teacher reccomended your channel and its amazing I can still find videos here not only covering a level but university content too!
if only i found out about this channel since year 1 med school wasted 6 years now graduated and this helps review for usmle exam, thank you brilliant doc and teacher
you're actually clutch for this one
You're more than perfect 👌. Thanks for your excellent and brilliant explanation 👏
Excellent. Your grasp on the subject and teaching is just fab.
Thank you very much!!!!! It is truly amazing that you can condense all these information in this one video!
The best lectures are of ninja nerd
This man is amazing. Always a pleasure watching your videos !!!!!!!
stay blessed ninja nerd , love you so much and you are the best .❣
You are awesome Ninja Nerd
15.55 the happiness I saw on your face was so touching u make me laugh and enjoy my med study tho if it's hard
Thank you for another amazing video breaking down these complicated things in an understandable and organized way! Love the drawings as well - very helpful :))
I love this man
You're the best teacher ever!
This is gold. Thank you so much.
Amazing and informative video
I love all of his Explaination.
Best chenell so far
Thank you so much Zach.
FAVOURITE CHANNEL THANKYOU HOPE YOU LIVE A BEAUTIFUL LIFE 💜
Thanks for your time to make this video great
I have specialization exam for my PhD and I have this ticket - you saved my grade :D
dude is a LIFESAVER!!!!!!
Thank you sir such a nice clear lecture and one of my favorit lecturer love from afghanistan
Terrific and glorious ninja
Zack paaji tussii great ho ji .❤❤
Seriously a best lecture ❤️🙏
the best teacher
Ultimate explanation sir 🔥🔥
You are truly blessed! Thank you!
Amazing!
Thank you as always for this amazing work of art !
thank you soooooooo
much Zach
You are a gift ❤️❤️❤️
Huge fan of ur sir😊
Great baby ,, I really appreciate this hard work ...,
Awesome video
superb awesome sir
THANK YOU
You are raw talent… original and good.
Thank you
THANK YOU SO MUCH!!! Thank youuuuuuu.
you're a life saver
u r best , thanks sir
thank you i am in ophthalmology residency, but no one help me to understand basic as you
You’re unbelievable!!!
Amazing ❤ thanks a lot ! 🙌🏻🙌🏻
Ohhh man you are genius ❤️
Have you ever heard of the McCollough effect
The McCollough effect is a phenomenon of human visual perception in which colorless gratings appear colored contingent on the orientation of the gratings. It is an aftereffect requiring a period of induction to produce it
Wow! you are so so great! Thanks a lot!!!
your videos are amazing! helped me understand so well thank you:)
Excellent
nice lecture 👍
Thank you so much.
thank you so so so so so so so much
you make everything make sense
thank you for helping me pass the exam, sir Q_Q
💛 thank you
Lots of love ❣️🇮🇳
I know you said that the phototransduction for rods and cones is really similar on the phototransduction cascade video, but how does the high amount of light doesn't cause the dissociation of the transducin on cones? Is that why you said the "less sensitive cones turn on"? so more sensitive cones would be turning on as adaptation to bright light occurs?
From what i know ,
There are about 120 million rods receptor , on each one there are plenty of escotopsin ( rhodopsin ) but these receptors have low threshold ( which means a high sensetivity to light photons ; that's why they can feel the less light in the dark after the adaptation
But on the other hand, we have cones which are hugily less in number compared to rods (only 7 millions mainly exist in fovea centralis or macula lutae ) but they have a highly threshold value so they do just work on highly amounts of photons
So in day light the rhodopsin is massivly destructed
Which means that the rate of its destruction exceeds the rate of its synthesis in liver and retina
On the other hand , theoritically only 1 million of the cones respond to the light
But at the end
The both cascades are the same but it only differs according to the sensetivity of the receptor
( i hope i explained it )
Legend!
Thank you sir
Thanks sir....u r the best❤️
Really helpful
I can't wait for the day when you have a contest for high school students and they give your whiteboard accounts accurately for scholarships.
Think what kind of physicians we would have them.
Such a great lecture mahn😍
nice explanation
I like before i watch.
Thank you
thank you!!
you are the best
Thanks sir, sir I want study about ERG, so please suggest video..
Thanks a lot ❤️
Thank you!!!!!
THANKYOU VERY MUCHIEEE
Thank you so much!!! 😭😭
Thanks❤
Awesome. Do you have a source you use for your knowledge? Textbook? Neuroscience book? Some books get really detailed like Guyton and Hall. Wondering where you find your information.
He uses BORON and the likes.
A personal suggestion-: Try to read GANONG which is a review book of physiology and make notes. You will find some concepts explained in a breath-taking way. Though your comment is 1 year old I doubt my suggestion would be of any help or not.
can u provide the link of visual pathway I am unable to find it
Tysm sensei
Nice!!
thank you! :)
very good video!!
Need the video on the embroyological development of human eye
Yes god exists! I found you my lord! Hail you sir😊🔥💎