Neurology | Optic Nerve | Cranial Nerve II: Visual Pathway and Lesions

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Ninja Nerds!
During this lecture Professor Zach Murphy will be teaching you about the optic nerve (cranial nerve II) and go into detail on the visual pathway, along with lesions that can occur. We hope you enjoy this lecture and be sure to support us below!
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#ninjanerd #OpticNerve #CranialNerves

[@shreyaray5500]

YOU COULD SINGLE-HANDEDLY PUT ALL THE PROFESSORS IN MY MED SCHOOL TO SHAME

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I think half of the world's med school 😅😂

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Yea, mine too 😂

[@sf.143]

seriously.. 95% of them suck at explaining and delivering the concepts while the remaining 5% hardly ever get assigned to my group..

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well yeah he probably gets paid more than them

[@mohamedomarfaraj2756]

@@rafiyashaikh2368 the whole world's med schools actually😂

[@besttiktoks4352]

You are a blessing for every medical student. Love and respect you from the core of my heart. I dont know how to express what I am feeling right now. Just.. Be billionaire and stay in good health.

[@safwanelamfannan6507]

I would never get this information from my university, you made everything crystal clear THANK you so much ..

[@bishwasmishra9837]

Where r u frm friend our colges are same too yaar

[@Trishapaytasofficial]

he probably gets paid more than university instructors

[@DocAmikable]

Which country

[@eugenmweemba1273]

Just wow😮 Five(5) years later and still unmatched Crystal clear concepts 🙏

[@anna-ivelisseclayton7564]

You are a life saver... we have an Anatomy teacher that basically disappeared and abandoned her students and I have been able to provide them content through your videos. THEY LOVE YOU! Thank you!/

[@mb1808]

holly hell.. i cant believe i actually followed through the whole thing .. lol ..ur a gem. THANKYOU

[@crazypiper9749]

This is excellent work mate! Keep it up!

[@NinjaNerdOfficial]

We plan too! Thanks so much!

[@fahad-xf2tb]

I am neurology resident and you are my official reference for neuroanatomy, this is unbelievable you are a legend

[@hermie7872]

wow, my university made us just remember the lesions from 5-8 blindly without any explanation. You have made everything clear, cannot thank you enough! 🙏🏻 , please keep up this channel! 👌🏻

[@augusttierney3199]

I love this video, and I am excited to watch the rest of the cranial nerves - which I know far less about. I've been working in an ENT department for about 1.5 years now, so I wanted to add a few things. First: anosmia is complete loss of smell, hyposmia is reduced smell. Usually, during a cold, you have hyposmia. The most common causes in order of anosmia are as followes: 1) Post-viral injury/damage 2) Trauma breaking the nerves 3) Chronic inflammation, like from allergies, covering the olfactory nerve 4) Far less common, tumors or masses. Also, one thing awesome, if the nerve is damaged from trauma or an infection, the olfactory nerve is the only cranial nerve that can grow back, so the doctors I work with are know recommending olfactory retraining, sort of like PT for the nose. It has worked pretty well.

[@augusttierney3199]

john towers, yep! I was watching the olfactory video. Somehow I commented on this one, but I’m not erasing it.

[@rubaalbarghouthi]

Thanks. Interesting 👌

[@ernestssewanyana5763]

You're doing a great job Zac. 30 minutes and optic tract is clear. Can't thank you enough. Be blessed sir!

[@linayas5571]

trust me ive watched several videos about visual pathway and lesions but yours is the best i couldn't understand till i watched yours THANK YOU SO MUCH you are saving a lot of peolple here ! God bless you

[@rawan723]

There are not enough words to describe how much i appreciate your efforts. THANK YOU

[@Colton-Hoerner]

Your the man! Better than my professor for anatomy by a long shot!

[@chamindakumara947]

I always double-check my lessons about Optometry with your channel. Thank you so much from Sri Lanka

[@reabitansky2769]

Man it's amazing how you cover up everything necessary for the each topic. You are doing a holy job thank you so much !!

[@rohitroll2119]

Every single video of yours is awesome.. First year med student here..and for me you're nothing less than a blessing..

[@alexandrmateas7627]

Damn, I would never get this information from my university professors, thank you so much!

[@whatev3857]

I have no words to express how grateful I feel that I found you guys, thank you for the immaculate and full of love job YOU ARE MAKING A DIFFERENCE for all med students struggling around the world 🌍💓

[@sherihangamal7375]

This is so freakin brilliant! Heard this so many times from so many people, this is the first time ever that I actually grasp the whole thing. Thank you so much!

[@faisalaldokhail829]

Thank you! This is amazing I really appreciate this effort, you made everything crystal clear.

[@pkalamaris]

Sam Webster was number one until I watched your videos my friend. The detail into which you go is awesome! Kudos!

[@RehamSalama98]

Pantelis C can you please share the link to Webster’s video on the visual pathway?

[@serotonin2222]

@@RehamSalama98 he is anatomy teacher tho

[@snarminoxx]

I'm blown away by your ability to unpack and communicate such a potentially intractable subject (bad pun). Your choices of when to use "Nasal/temporal" vs "L/R" were astute, and kept left/right confusion to an absolute minimum. You have helped a lot of people with these videos. THANKS!

[@divyachopra2692]

You are just amazing. You made physiology so simple and understandable, I can't even imagine passing physiology without your lectures

[@sketchwithmich]

I'm an international student in Germany, majoring in biology (well not a medical student). German is not my first language and i feel like I always need more time to understand what was taught in the lecture than other fellow students who are germans. I'm currently taking Physiology as a module this semester and I just can't stress it enough..how grateful I am to have found your channel 🥲thank you so much!!

[@dr.newlynroy4532]

I am enjoying learning Anatomy with Ninja nerd .what a joy I found you.

[@crystalshao4508]

Hi Same here. I’m learning anatomy in my fourth language, French. Thankfully, both French and English share a lot of terminology in common.

[@emanhammad3678]

Really, Well done!! This one of the best videos I've ever watched at my whole studying experience!!👏👏👏 I learnt something after a hundred of repetition OMG! Thank you so much 🙂🙂✌️💪💪

[@quaro936]

I literally cheered because i finally understood how the various lesions impacted on vision. maybe you saved my ophtalmology exam next month!

[@hadialjarrash6267]

You deserve all the praise! Thank you so much!! you simplified the difficult concepts in a very nice way!! I cannot describe how much this video helped me a loooot to understand the lesions especially the ones at the end!

[@yaki2648]

Holy Sweet Goodness! Just learnt a lot from this. Recommended by a friend. Thanks bro.

[@santhosh30899]

Oh my God! What an explanation! i UNDERSTOOD THE conecpts vry clear..Thank U so much Sir U make medical Students life easier! Keep making more Videos Sir

[@boxing0013]

Thank you so much brother! You made something so complicated be so simple in just a half an hour video! Your work is very much appreciated! Thank you again!

[@tayyabasohail8863]

I never got my concept that much crystal clear... no words to thank u man!

[@akanksharatna2825]

U r a brilliant genius teacher....this video suddenly gave me the energy to study hard nd understand the basics....u r soo awesome...loved ur way of teaching...thank u soo much Sir😇💙

[@vivian2026]

I actually fucking love you, thank you so much. You thoroughly yet concisely explain everything perfectly and I completely get it now. This deserves wayyyyy more than 5k views

[@rike4555]

Your videos are amazing!!! They're helping me a lot!!! Right now I'm going to each video you made about the cranial nerves, because my upcoming exam is soon. Your explanations are very good and understandable and your drawings are also perfect! Thank you very much for your nice explanations, pictures, efforts, etc. I really appreciate your emphasizing methods through many repeated sentences and that you sometimes shortly! go back to already discussed structures. I'm enjoying watching your videos and learning a lot :)

[@someshshingane3560]

can't even fathom how much time did you took to make this complicated concept this simple!!!!! great teaching communication !!! awesome!! kudos mate :)

[@shamimmemon7938]

Make more videos on pathology, pharmacology, and micro as i’m heading to my 3rd year and i need you to be my teacher in that year too. Love your work.

[@salmanthabet4507]

اقسم بالله انك شنب و احسن من الدكاترة الزبالين الي بيدرسونا

[@fasogeeek]

Salman Thabet 😂😂😂 انت ف انهي كلية

[@aboawad7532]

صدقت والله

[@Mohtellawi]

ههههههههههههه والله معك حق

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😂😂😂😂😂😂

[@rham6747]

اتفق اتفق اتفق

[@drnavi891]

you are really saving me during my exams ! im only listening to your lectures and writing my theory for my boards

[@tigermoth8902]

@NinjaNerdScience your videos are absolutely quality. I learn more from you, then lectures at med school. Thank you so much your intelligence and quality of teaching is phenomenal.

[@noriaugagia1219]

OMGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG I LEARNT SOMETHING FOR ONCE!!!!!!!!!!!!!!!!!!! THANK YOU

[@drjawad92]

I was never able to those lesions posterior to the optic tract. It was always a frustrating point. Thaank you sooooooo much for finally clearing it up! Feels amazing to know I finally understand it :-))))

[@ppi3390]

Thanks a lot, this is an amazing lecture! It helps me understand clearly about optic nerve that my school teachers dont.

[@berfinozgur4333]

You are the best Zach. You make everything easier. Thanks a lot for all your effort.

[@betielhaile8641]

My brain cells gave up on lesion 5 and left my brain completely at lesion 7 😭😩

[@simranrazdan6399]

Thank you so much! This was really helpful :)

[@NinjaNerdOfficial]

+Simran Razdan I am so glad it was helpful. Thank you for the nice comment!!

[@sahibvilkhu344]

Damn!!!!! The finest explanation of visual pathway on the internet. Thank you so much man......Great content. Keep it up.

[@drmiami2736]

Dude, this is super duper fantastic! All those draws and the whole spirit of this presentation made me say: Good job.

[@MrAsialicous]

Thanks so much! This was very helpful in my review of the visual pathway and VF defects!

[@joycealmeida5033]

Hi, I reallyyyyy love your videos. I think you are so clear and effective at explaining concepts that the professors at my university struggle to express to students. Especially since I have been online this semester, your videos have been a crucial part to my education. Would you consider in the beginning of your videos allowing for the screen with all the blank templates you drew out prior to starting the video to be recorded just a few seconds without you in frame so, we can screenshot and follow along with you as you draw it out? Thank you so much!

[@rosachavez2590]

That’s so smart

[@shrutigavval250]

Amazing! Thanks a lot for explaining the concept so wonderfully! Absolutely needed it just 2 days before the exam 👍🏻

[@giovanamartinez4050]

You made everything so much easier!!!! Thank you

[@doc.shalinewoodley2296]

Amazing work...God bless you sir.Love from Pakistan

[@e.a8826]

The only criticism I have for this video is that the lesions along the Meyer's Loop & Baum's Loop should be referred to as a quadrantonopia (not a hemianopia, as hemianopia refers to blindness in half of the field)

[@niteshsah7259]

I am here just to appreciate his efforts. His explanation is far far better than my university professors :)

[@alimustafakhan1469]

This is really an clear , excellent, amazing explaination mate , thank you very much for keeping things easy !!! Keep it up 👍👌

[@Dana-gu7vo]

you are my optic nerve

[@awokesamuel4068]

Sir you are the best ever, please complete autonomic nervous system and many topics in embryology thanks, you are highly awesome

[@NinjaNerdOfficial]

Thank you, we will have the sympathetic and parasympathetic videos up by mid December. 👍

[@farthyabdullahi8239]

U always reduce my med school work load through ur videos,thnx alot

[@gregpawluk7130]

I am so grateful for this video. The first ten minutes was just what I needed. Thank you very much

[@kahafilwara5280]

You are so awesome! Pls do make a video regarding spinal cord lesions. Thanks much!

[@Leo2171996]

You guys are the single best medical content lecturers out there! I am wishing you guys all the luck of this world in your future endeavors! Greeting from Greece!

[@risingpf176]

never knew neurology could be this fun when u actually got a good teacher, thanks alot

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Thank you so much for all of your incredible efforts and brilliant videos! You really make intimidating content approachable and fun. You rock!!!

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your vast knowledge blows me away...when did you first start studying all this?

[@Sponge247]

"Turn me over and tickle me twisted" lmfao

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Some of his remarks really make me crack up too XDD

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Hi I know explaining a joke makes it lame but I'm really curious to understand Would you please explain ?

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😂😂😂😂crying !!!

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I have struggled with this for years. I finally understand it. Thank you.

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Thank you so much! I actually understood neurology for the first time!!!! Just perfect

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"I'm sorry, but that's how it works""😂😂😂💜

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though i cannot pay them through direct funding but i watched twice ads not skipping it so that i might help the team thanks alot

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i think clicking on the ads helps them too

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They have a Patreon that you can contribute to! I just give a dollar a month since that's all I can do for now

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I'm so thankful for your existence! I mean it. I don't know what would I have done without your help.

[@shivanijoshi1640]

THIS IS SO HELPFUL OMG DUDE!! THANK YOU!!

[@himanshuambilkar4160]

Optic nerve cranial nerve- Left to right Right to nerve Temporal hemi retina Nasal hemi retina. Optic nerve Optic chiasmata Optic tract Lateral geniculate nucleus in THALAMUS.6 layers I/L 235. C/L 146. Optic radiation. Striae cortex primary visual cortex. Perception. LESION- Optic nerve- mono ocular blindness. Optic chiasma medial aspect- bitemporal hemianopia. I/L- binasal hemianopia. Right optic tract- left homonymous hemianopia. Right Baram loop/ Superior tectal fibers- Left inferior quadrant hemianopia. Left inferior rectal fibers-right Superior quadrant hemianopia. Right optic radiation- Left homonymous hemianopia Posterior cerebral artery- Left homonymous hemianopia with macula sparing. Thank you sir

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You got patreon bro? 🙃

[@NinjaNerdOfficial]

That we do! The link is in the info boxes of all of our videos! Thanks for your support 👍

[@nokubongavundla8725]

Thank you so much for simplifying this. Ive had trouble in this area for years. Oh my, I love you😍😗

[@benardansah1590]

Fantastic presentation .. kudos

[@shobhnatandon6585]

You are a wonderful teacher. Really admire you. Thanks for your efforts.

[@lidafubara6694]

Everything was clear but the lesions were somewhat difficult for me to understand. Otherwise good job . New subbie

[@blessych8821]

plz make a video of tracks of spinal cord 😢😢😢

[@AmitKumar-lp9wx]

What are you studying

[@shaizatariq1447]

All of your videos are soo helpfull. I dont even have to pick up my book. Thank youu. This all means alot.

[@ArmouredAlmond]

I wish my lecturer was this informative and good. She just comes to the lecture and changes slides. A new lecturer arrived yesterday, he was decent but still not this good.

[@captin__7658]

oh boy.. this is just the optic nerve.. wonder what the glossopharyngeal nerve is going to be like! An old neurobiologist told me one time that we have 12 cranial nerves and it takes a minimum of 12 years to learn them all. That statement is correct!

[@DaroAhD]

I need to learn that in 4 days for my exam... Just love time pressure.

[@yjs6364]

Dude this was really enjoyable and enriching man!

[@shravyak5045]

i cant tell you how thankful and grateful I am.

[@SingZeon48]

Personally I think you should've stuck to nasal and temporal. I appreciate your intent behind it but I think that students should get used to nasal and temporal ASAP, no matter how confusing they may be, because that's how it will be known anywhere else. Also, the left VF of the left eye may be even more confusing in future since it's 'left of left', 'right of left' etc.

[@SingZeon48]

Furthermore when you say 'right VF goes to left' etc., can also be confusing again. Think it would be better to say temporal stay, nasal cross or something equivalent.

[@AbhilashNairSpartnax]

@@SingZeon48 yes true

[@abelmanojabraham1681]

Really love your presentation. There are a few mistakes though. Quadrantic field defects are known as "quadrantanopia" and not 'quadrant - hemianopia'. Hemi means half.

[@mardukmazda685]

You are the best!! Amazing explanation. I never got such smooth lecturing from our university professors. once again ,You are THE BEST. Thanks for the informative video❤️🙏🏻

[@zaynmalik879]

Extremely helpful! God bless u

[@user-tc1rs7mq1s]

Thank you put I think you have mistake in 6 and 5 lesion!!

[@bobthegamer4699]

y

[@linayas5571]

ive noticed that too

[@staytube4572]

Love your amazing work.. I'm very thankful and grateful to find this channel. Thank u so much prof.. And his cool too.. ❤

[@mgoyo89]

Amazing job thanks so much for your dedication in these videos!!

[@ericortiz5591]

Thank you so much! you're so helpful. I appreciate this information. The way you framed it was perfect for my neruo class for speech. Thank you again

[@sukh6566]

another brilliant video from Zach! Thank you so so much ❤❤

[@SuperDivya123]

Thank you so much ! This actually really makes sense to me now!

[@allinonecricket9870]

I learnt the visual pathway in my first profession and now I'm in an internship and wanted to revise, use many other videos but still your lecture made it simple and clear all my doubts as clear as it was in my first profession.

[@vasudevmodi4709]

Awesome lecture sir in my college after understanding this 2 times in college nothing hit to my head but your video made it so clear and finally I understand it very easily.Thank you sir keep uploading videos sir you are doing a very noble job for many nation as doctors which serve nation you are building their concepts who are to be future help of mankind.May good bless you🙌

[@darryldee467]

Thank you for this free lecture and illustration. 🙂❤👍✔

[@shonatony]

thank you so much for for putting out this video . It saved my life

[@dr.roshaanarshad276]

THANKYOU SOOO MUCH for helping in such a great way! 💐💐💐💐💐💐 Its awesome way to make clear concepts. 👏👏

[@JaspreetKaur-nx3om]

Thank you so much! Your hard work is appreciated!!

[@hypnotixcrewbboy]

Great job mate! You are explaining this so well!