اناٹومی مطالعاتی نوٹ · Upper limb

Radial nerve

The largest branch of the brachial plexus, from the posterior cord (C5–T1). It supplies all the extensor muscles of the arm and forearm.

اہم نکات

• Posterior cord, C5–T1; all extensors.
• Spiral groove with profunda brachii → shaft fracture → wristdrop.
• Deep branch pierces supinator → posterior interosseous nerve.
• Superficial branch: sensory to the lateral dorsum of the hand.
• Deep-branch lesion: no wristdrop (ECRL spared).
• Upper limb nerves: C4–T2 segments; lower limb: L2–S2.
• Ventral root: basal-lamina neurons. Dorsal root: neural-crest ganglion cells.
• Nerve: epineurium → perineurium (blood–nerve barrier) → endoneurium.
• Cut nerve: Wallerian degeneration; regrows 0.5–3 mm/day.

اٹلس میں مکمل نوٹ میں یہ بھی شامل ہے

Course · Branches · Histology · Development · طبی اہمیت

مفت سائن اِن کریں تاکہ اسے 3D ماڈل پر دیکھیں، مکمل نوٹ پڑھیں اور اس پر سوالات کی مشق کریں۔

ماخذ

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 3, PDF pp. 350–353, 357–364
• Inderbir Singh’s Human Embryology, ch. 17, PDF pp. 318, 321, 323–325; ch. 10, PDF pp. 143–144
• BRS Cell Biology & Histology, 7th ed., ch. 9, PDF pp. 163–166, 171–172

upper limb سے مزید

• Radioulnar joints and interosseous membrane
• Radius
• Rhomboid major
• Rhomboid minor
• Scapula
• Serratus anterior
• Shoulder joint
• Sternoclavicular joint
• Subclavius
• Subscapular nerves
• Subscapularis
• Supinator

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