Radial Nerve anatomy - Everything You Need To Know - Dr. Nabil Ebraheim

Dr. Ebraheim’s educational animated video describes the anatomy associated with the radial nerve.
The radial nerve receives branches from each nerve root from C5-T1. The radial nerve continues into the posterior compartment of the upper arm. The radial nerve then gives three branches in the axialla
1-Branch to long head of triceps
2-Branch to medial head of triceps
3-Posterior cutaneous nerve of the arm
Some books show the position of the posterior cutaneous nerve of the arm being higher than the branches of the triceps. The profunda brachii artery arises from the axiallary artery. The radial nerve next travels through the triangular interval with the profunda brachii artery posteriorly.
Boundaries:
•Teres major
•Long head triceps
•Humeral shaft
Contains the profunda brachii artery and the radial nerve.
The radial nerve enters the upper arm between the long head and the medial head of the triceps and then it runs towards the spiral groove of the humerus.
What is the spiral groove? The spiral groove is a thin, bare area of bone that lies in the upper 2/3 of the back of the humerus. Between the lateral and medial head of triceps. There are posterior safe zones of the humerus, 10 cm distal to the lateral acromion and 10 cm proximal to the lateral epicondyle. Four branches arise from the radial nerve within the spiral groove:
1-Branch to lateral head of triceps
2-Branch to medial head of triceps
3-Lower lateral cutaneous nerve of the arm
4-Posterior cutaneous nerve of the forearm
In the posterior approach, if the surgeon follows these cutaneous nerves proximally, it will lead to the identification of the radial nerve itself.
The radial nerve passes through the lateral intermuscular septum, running between the brachialis and brachioradialis muscle anterior to the lateral epicondyle (site for surgical exposure).
Anterior view: the radial nerve gives branches to supply the lateral part of the brachialis, brachioradialis, extensor carpi radials longus, and the extensor carpi radialis brevis muscle.
The radial nerve is vulnerable to injury below the spiral groove when there is fracture in the distal third of the humeral shaft. Injury to the nerve will cause the condition of wrist drop. At about the level of the lateral epicondyle, the radial nerve begins to divide into deep branch and the superficial branch of the radial nerve. The posterior interosseous nerve (Deep) enters the extensor compartment of the forearm through the supinator muscle. The area in which the posterior interosseous nerve passes through is called “Arcade of Frohse” and this area is often a site of entrapment of the nerve. The posterior interosseous supplies these muscles on the radial side and dorsal surface of the forearm:
1-Extensor carpi ulnaris
2-Extensor digiti minimi
3-Extensor digitorium
4-Extensor pollicis brevis
5-Extensor indices
6-Extensor pollicis longus
7-Abductor pollicis longus
The posterior interosseous nerve does not supply cutaneous sensation and is purely motor.
The superficial radial nerve runs deep to the brachioradialis muscle. The superficial radial nerve continues until about 5 cm above the wrist where it immerges from underneath the brachioradialis muscle, piercing the deep fascia and descending towards the anatomical snuff box. The superficial radial nerve is a sensory nerve supplying the majority of the dorsum of the hand. The sensory areas involving the cutaneous branches of the upper arm and forearm and the superficial sensory radial nerve are shown here.
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audio is provided as a free download

[@euscieu4246]

I just wanted to thank you!
Your videos have been absolutely indispensable to me during my MSK block.
You are a legend

[@riccikalaya4614]

Thank you! Very clear, concise and (hopefully) comprehensive!

[@mohammedjihad1739]

really wonderful way for description and anatomy studying thanks alot

[@dimosthenismandilas6893]

Dr. Nabile you are always the best...

[@lovelyheart27]

Thanks for the videos Dr. Nabil, very helpful for someone like me who is a visual learner..

[@godschild5824]

Thank you Dr. Ebraheim :-)

[@nabilebraheim]

thanks

[@dryapmannyin1263]

I'm a medical student who going to enter orthopedic posting next week, all the videos are very helpful to guide me to learn the orthopedic in a very interesting & easy way ~Thank you so much prof~^~^~i feel like prof is giving me teaching in front of me~

[@qamarfallatah8636]

Thank you so much, may God bless you ...

[@geojor]

thanks for sharing...

[@johnadriandodge]

Excellent!

[@krakerkrunch]

muvhas gracias Dr Nabil es precioso

[@samrakazmi3589]

great video!

[@obsessed33]

thanks so much!

[@omarkabir8916]

جزاك اللهُ خيرًا

[@hypatia123456]

you are awesome ...thank you...

[@Gamgamz01ws]

thank,Very clear.

[@elmaselman7806]

Thank you very much!!!

[@zainabsameer5023]

Amazing..thanx

[@akhterhamid6828]

amazing! !!!!wt a fantastic video.....sir thnx. ...

[@kajribhargava9914]

thank you ...it is a great video

[@ramican9155]

Good one!

[@DrPoonamsvlog]

never in my medical career i was so clear about the nerve route and distribution as i am today after watching you you tube description sir.Thanks for a lovely and knowledgeable explanation

[@hayaalgaddafi7527]

u r the best =D thanX dr :)

[@Gamgamz01ws]

Thank 😊

[@omarfawzi8802]

شكرا دكتور :)

[@waleedal-sharkawy3487]

Thanks dr. Nabil so much for valuable content.
Just one comment-->
at 6.22 minute the diagram shows incorrect distribution of posterior cutaneous & lower lateral cutaneous nerves of arm

[@zinolee35]

good video

[@yasserfathelbab1534]

thanks.

[@leoschilker]

Is possible isolate all triceps heads from main trunk of radial nerve or each head have indenpendent branch from the others?

[@lakshmisudhir4251]

Thnq sir🙏🙏👍

[@marceloramos3024]

Boa trd! Sou do brasil fiz uma cirurgia no dorso da mao precisamente no segundo metacarpo colocaram dois parafusos há 20.meses venho sentindo dores.no trajeto desse nervo radial acho que lesionou ele sinto queimacao ardência dor da mao a cabeça alguém pode me ajudar?

[@ahmedmudheher9798]

I had a cut in the radial nerve from under the triceps muscle and I had a nerve ligation operation 5 months ago, and I have not yet reached the healing stage. I can know how long it takes to restore the movement of the palm to its previous state Please I need help

[@amontana2414]

How are you now?

[@8280573]

gread video

[@prafulherode7819]

No sound, pls repost Dr

[@draksen5175]

06:11 I'm not sure it actually covers the 4th finger

[@d.beautygirl8805]

Profunda is from brachial artery NOT axillary!!!!!!!!!!!!!

[@MonirulIslam-rz1mv]

আমি বাংলাদেশ থেকে বলছি, আমার নার্ভ ছিরে গেছে,,আমি ডাঃ নাভিল ইবরাহিম এর, এ্যাপাটমেন্ট নিতে চাই, কিনতু কিভাবে নেব বুজতে পারছি না,,কেউ আমাকে সাহায্য করুন,, দয়া করে যিনি পারবেন, help me

[@sagormahmud4160]

এখন কি অবস্থা ভাই আপনার।.?

[@nabilebraheim]

thanks

[@d.beautygirl8805]

Profunda is from brachial artery NOT axillary!!!!!!!!!!!!!

[@apoorvach4258]

brachial artery is a continuation of axillary so it's okay

[@antonkormushin8318]

D.Beautygirl yes. a.brachi profunda is branch of the a. brachialis

[@nabilebraheim]

thanks