Region Map · Upper limb
1Axillary nerve C5–C6
Surgical neck of the humerus Numb “regimental badge” area
For medical students at Saudi universities
You memorise the nerve names. Then the exam asks what happens if one is cut.
MedixLearn turns every anatomy region into one map: where a structure is, what it does, what you see when it’s injured, and how it’s asked. Explained in Arabic, with the English terms your exams use.
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Region Map · Upper limb
2Radial nerve C5–T1
Mid-shaft humerus (radial groove) Wrist drop
Region Map · Upper limb
3Ulnar nerve C8–T1
Behind the medial epicondyle Weak finger adduction · numb little finger
Region Map · Upper limb
4Median nerve C5–T1
The carpal tunnel Thenar wasting
The night before the practical
It isn’t your ability. It’s how the information reaches you.
The notes are open and there are hundreds of slides. You memorise the branches of the brachial plexus in order, knowing you’ll forget them before you do. Medicine is hard and we won’t pretend otherwise, but much of the struggle comes from facts that nothing ties together.
- 01
Hundreds of slides every block, and no map that ties them together.
- 02
Hours between YouTube and old notes looking for one clear explanation.
- 03
Cram the night before, forget it a week later.
The MedixLearn method: the Region Map
Every structure in four layers: map, function, lesion, question.
Try it now on the nerves of the upper limb. Tap any nerve.
Axillary nerve
C5–C6-
01Map · Where it is, what it relates to
Winds around the surgical neck of the humerus with the posterior circumflex humeral artery, after passing through the quadrangular space.
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02Function · What it does
Supplies deltoid and teres minor, and the skin over the lower deltoid.
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03Lesion · What you see when it is injured
Surgical-neck fracture or anterior shoulder dislocation: weak arm abduction, a flattened shoulder contour and a numb patch over the deltoid.
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04Question · How it appears in the exam
After an anterior shoulder dislocation a patient cannot abduct the arm and has numbness over the deltoid. Which nerve?
Reveal the answer
The axillary nerve
Radial nerve
C5–T1-
01Map · Where it is, what it relates to
Runs in the radial (spiral) groove on the back of the humeral shaft with the profunda brachii artery.
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02Function · What it does
Supplies the extensors of the elbow, wrist and fingers, and the skin over the dorsum of the hand at the base of the thumb.
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03Lesion · What you see when it is injured
Mid-shaft humeral fracture: wrist drop and numbness over the back of the hand. Triceps is usually spared because its branches leave above the groove.
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04Question · How it appears in the exam
A patient with a mid-shaft humeral fracture cannot extend the wrist. Which nerve is injured?
Reveal the answer
The radial nerve
Ulnar nerve
C8–T1-
01Map · Where it is, what it relates to
Passes behind the medial epicondyle of the humerus in the cubital tunnel: the “funny bone”.
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02Function · What it does
Supplies most of the small muscles of the hand, and the skin of the little finger and half the ring finger.
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03Lesion · What you see when it is injured
Medial epicondyle fracture: weak finger abduction and adduction, and a numb little finger. Clawing of the ring and little fingers is usually more marked when the injury is at the wrist than at the elbow (the “ulnar paradox”).
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04Question · How it appears in the exam
After a medial epicondyle fracture a patient cannot grip a card between the fingers and has a numb little finger. Which nerve?
Reveal the answer
The ulnar nerve
Median nerve
C5–T1-
01Map · Where it is, what it relates to
Crosses the wrist inside the carpal tunnel, under the flexor retinaculum, with the long flexor tendons.
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02Function · What it does
Supplies most forearm flexors and the thenar muscles, and the palmar skin of the thumb, index, middle and half the ring finger.
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03Lesion · What you see when it is injured
Carpal tunnel syndrome: tingling in the lateral three and a half fingers that is worse at night, weak thumb opposition and thenar wasting.
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04Question · How it appears in the exam
Tingling in the thumb, index and middle fingers wakes a patient at night, with weak thumb opposition. Which nerve, and where?
Reveal the answer
The median nerve, in the carpal tunnel
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Platform design preview · sample data
Map
Radial groove · mid-shaft
Lesion
Wrist drop
04:12
11:20
Upper Limb · Lesson 3
Arm compartments
Notes Resources Quiz
Note at 03:48
Triceps spared: branches leave above the groove.
Region Map · PDF
Upper limb nerves, one page
Start here · free
Anatomy exam coming up? Take the final-week plan.
- A 7-day plan for the week before the exam, day by day
- The upper-limb nerve map: the four exams keep returning to
- A terminology sheet: the English term with an Arabic explanation
- 25 exam-style questions, every answer explained
MedixLearn Free
PDF · AR / EN · 11 pages
The 7-Day Anatomy Exam Plan
7 days · the nerve map · 25 explained questions
Anatomy · founding list
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Who is behind MedixLearn
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Dr. Suhaib Alhaj
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MedixLearn’s medical content is prepared under his lead, written to explain rather than to cut corners: every structure is tied to its function, to what happens when it is injured, and to how it is examined.
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