Anatomy Of The Ulnar Nerve - Everything You Need To Know - Dr. Nabil Ebraheim

Dr. Ebraheim’s educational animated video describes the Ulnar Nerve Anatomy.
The ulnar nerve originates from the C8-T1 nerve roots which form the medial cord of the brachial plexus.
The ulnar nerve runs down the arm where it passes behind the medial epicondyle of the humerus at the elbow is.
The Ulnar nerve does not give branches in the axilla or in the upper arm.
It starts giving muscular and cutaneous branches in the upper forearm and hand.
After the ulnar nerve passes behind the medial epicondyle, it enters the forearm between the two heads of the flexor carpi ulnaris muscle.
As the ulnar nerve passes behind the medial epicondyle, it may become compressed or irritated.
The ulnar nerve travels through a tunnel of tissue (cubital tunnel) that runs under the medial epicondyle.
Pressure on the nerve at the elbow can cause numbness or pain in the elbow, hand, wrist or fingers.
In the case of the Ulnar nerve compression in the elbow: we notice Tinnel’s sign which is:
- a tapping technique performed to test for symptoms of ulnar nerve entrapment at the elbow(cubital tunnel syndrome).
- Tapping on the nerve causes electric shock, tingling and numbness in the medial two fingers much like when hitting the funny bone.
The nerve gives branches to the flexor carpi ulnaris and the medial half of the flexor digitarum profundus.
The ulnar nerve travels alongside the ulna bone of the forearm into the wrist.
As the nerve descends into the forearm, it stays medially above the flexor digitarum profundus and under the flexor carpi ulnaris, giving branches to those muscles.
In the lower part of the forearm the ulnar nerve lies lateral to the flexor carpi ulnaris muscle and medial to the ulnar artery.
The ulnar nerve enters the palm of the hand through the Guyon’s canal.
The nerve and artery pass superficial to the flexor retinaculum.
At the wrist, the Ulnar nerve lies just lateral to the pisiform bone.
The superficial branch of the ulnar nerve that supplies and passes under the palmaris brevis muscle and divides into palmar digital nerves.
The deep branch of the ulnar nerve innervates the three hypothenar muscles, the medial two lumbricals, the seven introssei, the adductor policis and the deep head of the flexor pollicis brevis.
It supplies all intrinsic hand muscles which lie medial to the flexor pollicis longus except the lateral two lumbricals(Median nerve).
The deep branch of the ulnar nerve innervates:
- Opponens Digiti Minimi.
- Flexor Digiti Minimi.
- Abductor Digiti Minimi.
- Third and Fourth Lumbricals.
- Palmar and Dorsal Interossei.
- Adductor Pollicies.
- The deep head of Flexor Pollicis Brevis.
The ulnar nerve provides palmar and dorsal sensory innervation to the little finger and half of the ring finger.

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[leslieg]

Dear Dr. Ebraheim,
I am a 60 yr old woman and Thanking You for this awesome, well done video! After a 10 speed bike accident @ 18 yrs old. (I wasn't technically "on the road) I was on the shoulder of road when a man wasn't paying attention (putting a cigarette out-he admitted) and went off the road, hitting me at a minimum of 65 mph at impact. It's a miracle that I lived. It was thought my right arm, right leg may had been broken. They also had concerns that my ack had been broken. Amazingly enough, I had not 1 broken bone! But, I did end up with Ulnar nerve damages in both arms. Two surgeries on right arm. I chose to leave left arm alone. It wasn't as problematic as the right arm had become. The 2nd surgery had to happen because my arm actually became worse off than before the first surgery. Which I had to demand the 2nd surgery. So Dr went in to explore as to what I was sure something wasn't right. The surgeon did apologize after learning: "He said he must have not stripped/cleaned of any lingering loose tissue around the nerve. That he was glad I pushed him into going in to explore. He found scar tissue had wrapped around my ulnar nerve and it nearl had ulnar nerve cut in half creating a very tight hourglass shaped nerve. I chose to do my recovery P.T. myself the second time. Because my P.T. after 1st surgery didn't go so well. I could only open/extend my arm to only 60%. The second surgery I had a membership at a gym with whirlpool, etc. All I needed +. I convinced surgeon to allow me 2 weeks and if he didn't think I was progressing enough I'd follow his normal orders. That visit after 2 weeks he was impressed and allowed me to continue. Which the most I achieved (better than my 1st recovery) Ive been able to extend arm out to between 85 to 95% "maybe a tiny more. Though I have always been weaker in it than prior to accident. With some limitations. Which prevented me from achieving some goals I'd planned via couldn't pass physical via any military branch. Never been able to do thing's like play racket ball, etc. (Neither arm. Right arm being the worst. Still. At my age now, 60. I seem to be more limited.
This past Wednesday night I ended up in the ER not sure what the excessive pain was that I was experiencing. My hand even had some swelling. My shoulder was also bothering me, painful. I had swelling from elbow to shouder. Multiple area's on arm with intensed muscle spasms. We confimed I had no broken bone's. A plus! But when ER Dr decided to press on the inside, apparently halfway between arm pit and elbow, had I been able to jump off tabe I would have! ER Dr instructed me to see my GP to order an MRI. Appt this Tuesday.
This evening I decided to attempt in learning which did the ER Dr actually pressed. Thank's to your video, (yes, I'm going there) : my Ulnar nerve. Though I will have no problem getting an MRI. I actually still wish for one. Because the most strenuous I'd done was wet mopped. I'm puzzled as to why I had this different kind of pain. + It seems like the pain was also in shoulder. Which having woke 1 day aprox 10 years ago: with PTS = Parsonage Turner Syndrome. Not sure if one aggravated the other or not. Regardless, it's still being a bother, weak, & painful.
As for my PTS, There's no one in my area knowledgeable as much as I am. It hasn't been medically managed accordingly since aprox 7 yrs ago in the medical field. My Ins doesn't pay for Pain Management. But, last year I actually found a Natural product that definitely manages the inflammation without any side effectsand truly work's! Without steroids, mobic, etc. Though it is pricey and having been forced to retire early, well it makes lift $ challenging as well.
I brought up my PTS via Parsonage Turner Syndrome up with the hope that you may already have a video on such!
I'll explore tomorrow in learning either way. & if you don't have info on PTS just yet. I wish you do so soon, sooner.
Again Thank You kindly,
All of you have a wonderful Thanksgivings!

[barrybebenek]

Of so many videos I’ve watched on this topic, and how my doctor hasn’t suggested any real solution, this has been the only video that has completely explained what is going on in my elbow/nerve. The step by step animation is a god-send! Thank you. 👍🏼🇨🇦

[YahyezAbdi-yehm]

If a person want to make anatomy videos make like this one or leave it alone superb video thanks make more videos

[manabtiwari]

it is more than enough for medical
thank you so much

[oasia]

Great to see the anatomy and learn where the ulna nerve originate and where it is goes. It's helpful for me to visualize what is included in this video. I feel the music could be livelier> it's a bit morbid.

[highphysics]

Absolutely brilliant informative presentation without background racket!

[CaleanWsh]

Dr. Nabil - As a patient with ulnar nerve entrapment, and, as a result, paresthesia and "claw hand", I found this video to be very understandable (especially when it has pictures to go along with the Latin!) This is information that a doctor should share with their patient! This helps me to understand what my ulnar nerve does, where it is trapped and where it originates at the spine! As it turns out, I also have spinal stenosis at C8/T1. I will be sure to mention that to my neurologist when I go see him! THANK YOU!

[danechurch]

Dr. Ebraheim this was definitely one of your best videos. Just keep them coming, you are creating quite the legacy. Also, thank you again for the interview this past week. You have a great program!

[geojor]

thank you Dr. for your excellent medical videos...

[zpto]

Excellent video...as usual..all your videos are highly helpful .. sincere thanks for making such wonderful videos

[A서준권]

I am korean
Your video is so amazing!!!
Thank you for making videos

[adrian]

Your videos are the best ones i've ever seen here on youtube. Great work!

[christophedelespinasse]

Hello,
Is there a mistake with the labeling of the palmaris longus and the flexor carpi radialis?

[rawanayyash]

omggg this made total sense and in just 5 minutes instead of 2 weeks thank youuuu

[mahrukhmalik]

Fantastic... marvellous..this channel really don't waste our time ..superb

[pspmasterlife]

This is the best explained because when I was on wiki they just showed the nerve but when I came on here it showed what bone and muscles surrounded the nerve this was best explained to me cause in my case I just feel a little ball on my elbow and if I move it

[kaleidoscopekay]

A great video of the Ulnar Nerve. I've been having trouble with this nerve in the elbow area and it's easy to understand why it happens with the illustration and explanation. Thanks.

[hagarabdelnasser]

can't thank you enough .. thank you

[matthewharwood]

I am studying for OCS. This video was helpful

[tomtenthij]

Thank you SO much for this amazing video!!! It is really helpfull!! 😃😃😃