Ulnar nerve Anatomy: Origin, Course, Branches, Cubital Tunnel Syndrome ||
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- เผยแพร่เมื่อ 2 มิ.ย. 2020
- 📌 𝐅𝐨𝐥𝐥𝐨𝐰 𝐨𝐧 𝐈𝐧𝐬𝐭𝐚𝐠𝐫𝐚𝐦:- / drgbhanuprakash
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Ulnar nerve Anatomy: Origin, Course, Branches, Cubital Tunnel Syndrome, Guyon's canal syndrome
Origin
---------
• Ulnar nerve comes from the medial cord of the brachial plexus (C8-T1)
Course
-----------
Arm
• lies posteromedial to brachial artery in anterior compartment of upper 1/2 arm
• pierces medial IM septum at the arcade of Struthers ~ 8cm from medial epicondyle and lies medial to the triceps
• the arcade of Struthers is an aponeurotic band extending from the medial IM septum to the medial head of the triceps
Elbow
• runs behind medial epicondyle with superior ulnar collateral artery
Cubital tunnel
• roof - Osbourne’s ligament proximally (extension of deep forearm fascia between heads of FCU) and FCU aponeurosis distally
• floor - posterior and transverse bands of MCL and elbow joint capsule
• sends small sensory branch to elbow that can be sacrificed
Forearm
• enters forearm between 2 heads (humeral and ulnar heads) of FCU
• runs between FCU and FDP
Wrist
the ulnar nerve and artery pass superficial to the transverse carpal ligament
bifurcates into sensory and deep motor branches in Guyon's canal
• roof - volar carpal ligament
• floor - transverse carpal ligament, hypothenar muscles
• ulnar border - pisiform and pisohamate ligament, abductor digiti minimi muscle belly
• radial border - hook of hamate
Innervation
-------------------
Motor Innervation
forearm
• FCU
• FDP ring and small
Thenar
• adductor pollicis
• deep head of flexor pollicis brevis (FPB)
fingers
• interossei (dorsal & palmar)
• 3rd & 4th lumbricals
hypothenar muscles
• abductor digiti minimi
• opponens digiti minimi
• flexor digiti minimi
Sensory Innervation
sensory branches of ulnar nerve
• dorsal cutaneous branch
• palmar cutaneous branch
• superficial terminal branches
Clinical Anatomy
---------------------------
• Cubital Tunnel Syndrome is a condition that involves pressure or stretching of the ulnar nerve (also known as the “funny bone” nerve), which can cause numbness or tingling in the ring and small fingers, pain in the forearm, and/or weakness in the hand.
• Guyon's canal syndrome is an entrapment of the ulnar nerve as it passes through a tunnel in the wrist called Guyon's canal. This problem is similar to carpal tunnel syndrome but involves a completely different nerve. Sometimes both conditions can cause a problem in the same hand.
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Very good presentation. The kind of video that anyone can easily understand. Thank you so much sir
Tysm
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Glad you like them!
I just had an ulnar release in my wrist yesterday. Found this video really neat and helped to understand some terms they used in post op report. They checked elbow too but all nerve damage was at wrist.
Thank you
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Radial nerve Anatomy - Origin, Course, innervation, Saturday night palsy, Wartenberg’s syndrome
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Tysm
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الف رحمة على والديك مدير على هل الشرح
I am Gp. And waiting for AMC. Sir your explanation and graphic design gave me full clear picture of the arm nerves which was very difficult. Thanks and respect you sir.
Most welcome, and thank you for your appreciation
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Mast
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TYSM
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Tysm
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Tysm
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Tysm
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tysm
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Tysmmmm
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Thank you Dr. G Bhanu Prakash for your informative videos. I do suffer from orbital tunnel syndrome....I was wondering where you're located and if you treat the maladies you describe? Thanks,
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Cubital tunnel syndrome...ulnar nerve compression...bcoz adduction of thumb lost and sensation lost over ventral and dorsal aspect of medial side of forearm
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🎯 Key Takeaways for quick navigation:
02:25 🖐️ Ulnar nerve originates from the medial cord of the brachial plexus, innervates intrinsic hand muscles.
04:25 🛑 Cubital tunnel: Ulnar nerve passes posterior to medial epicondyle, causing cubital tunnel syndrome.
06:38 💪 Ulnar nerve supplies flexor carpi ulnaris and medial half of flexor digitorum profundus in forearm.
10:52 🤝 Guyon's canal: Ulnar nerve enters hand, divides into deep and superficial branches, innervating intrinsic hand muscles and skin.
16:23 ⚡ Ulnar neuropathy: Common at elbow (cubital tunnel) or wrist (Guyon's canal), causing muscle weakness, claw hand deformity.
Thank u sir... 🙏🏻
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Tysm
Sir if ulnar nerve cut properly then little finger is working, moving or not plz reply.
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Sir I have been going to the gym and I got cubital tunnel syndrome and it keeps hopping from one side of my elbow to the other as I extend my elbow on my pushing exercises. The Ulnar nerve on my left arm seems much more inflamed than my right arm. I don't feel any pain or numbness as of yet but I'm afraid it would cause me some pain as time goes by if i keep going to the gym evn if i keep nerve flossing and treat it well. What should I do? Please help sir 🙏
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