Special Senses | Photoreceptors | Rods and Cones
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- čas přidán 30. 07. 2017
- Official Ninja Nerd Website: ninjanerd.org
Ninja Nerds!
During this lecture Professor Zach Murphy will be teaching you about the mechanism of photoreceptors. We go into great detail on the rods and cones, and how they respond differently to various types of light. Finally, we discuss how we adapt from a light to dark environment, to a dark to light environment, and how these photoreceptors respond. We hope you enjoy this lecture and be sure to support us below!
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#ninjanerd #Photoreceptors #EENT
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.
Really I’m so happy because we live in same time ♥️
This channel fell from heaven 💙💙
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 ❤
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. ✔✔👍
Wish I had found you at the beginning of this semester.
I love it. Excellent drawing and explanation. It draws all the points together that helps me understand the whole process. Very good job!
Thank you very much!!!!! It is truly amazing that you can condense all these information in this one video!
Excellent. Your grasp on the subject and teaching is just fab.
I have to tell you I have spent the whole day watching your videos haha, can't believe I only discovered them today
Thank you for another amazing video breaking down these complicated things in an understandable and organized way! Love the drawings as well - very helpful :))
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!
"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 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
This man is amazing. Always a pleasure watching your videos !!!!!!!
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 as always for this amazing work of art !
You are truly blessed! Thank you!
Thank you so much Zach.
BROOOOOOOOOOOO!!!!!!!!! This video was the best video in explaining this process. Thank you sooooo much for making it!!!!!!!!!!!!!
I agree!!
You're more than perfect 👌. Thanks for your excellent and brilliant explanation 👏
I love this man
Thanks for your time to make this video great
The best lectures are of ninja nerd
This is gold. Thank you so much.
Seriously a best lecture ❤️🙏
You're the best teacher ever!
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
Ultimate explanation sir 🔥🔥
stay blessed ninja nerd , love you so much and you are the best .❣
your videos are amazing! helped me understand so well thank you:)
I love all of his Explaination.
you're actually clutch for this one
FAVOURITE CHANNEL THANKYOU HOPE YOU LIVE A BEAUTIFUL LIFE 💜
U teach more than my professors do
Amazing and informative video
THANK YOU SO MUCH!!! Thank youuuuuuu.
Such a great lecture mahn😍
superb awesome sir
Terrific and glorious ninja
Amazing!
Thank you so much!!! 😭😭
You are awesome Ninja Nerd
thank you soooooooo
much Zach
u r best , thanks sir
you make everything make sense
Wow! you are so so great! Thanks a lot!!!
Very helpful ☺️ tysm
Amazing ❤ thanks a lot ! 🙌🏻🙌🏻
Amazing 🤩
You are a gift ❤️❤️❤️
I have specialization exam for my PhD and I have this ticket - you saved my grade :D
dude is a LIFESAVER!!!!!!
Huge fan of ur sir😊
very good video!!
Thanks sir....u r the best❤️
Awesome video
thank you so much you are amazing
Great, thanks so much
Best chenell so far
you're a life saver
Thank you so much.
the best teacher
Really helpful
Thank you so much sir ❤
Thank you sir such a nice clear lecture and one of my favorit lecturer love from afghanistan
Thanks a lot ❤️
nice lecture 👍
nice explanation
You’re so Amazinggggggggggggggg
Thank u so much😍
Excellent
Great!!!
thank you for helping me pass the exam, sir Q_Q
thank you!!!!!!!!!!
💛 thank you
THANK YOU
Zack paaji tussii great ho ji .❤❤
thank you!!
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
Ohhh man you are genius ❤️
Nice!!
Great baby ,, I really appreciate this hard work ...,
Thank you sir
Wonderful....
Thank you!!!!!
Thank you
thank you i am in ophthalmology residency, but no one help me to understand basic as you
You’re unbelievable!!!
best one
Thanks sir, sir I want study about ERG, so please suggest video..
thank you! :)
thank you so so so so so so so much
THANKYOU VERY MUCHIEEE
Legend!
Tysm sensei
you are the best