Supination and Pronation in forearm | Anatomy

Pronation Palm facing downwards
Supination Palm facing upwards
Mnemonic
'Beggars- Supinate'
'Kings -Pronate'
(or)
'Supinate to the Sun and Pronate to the Plants'
(Supinate: palm towards the sun, Pronate: palm towards the plants)

Involved joints Proximal radioulnar joint - between the head of the radius and the radial notch of the ulna
Distal radioulnar joint - between the head of the ulna and the ulnar notch of the radius
Acting muscles Pronator teres muscle - enables pronation
- origin: medial supracondylar ridge of humerus (humeral head), coronoid process of ulna (ulnar head)
- insertion: lateral surface of radius
Pronator quadratus muscle - enables pronation
- origin: distal anterior surface of ulna
- insertion: distal anterior surface of radius
Supinator muscle - enables supination
- origin: lateral epicondyle of humerus, radial collateral ligament, anular ligament, supinator crest of ulna
- insertion: lateral, posterior, and anterior surfaces of proximal third of radius
Biceps brachii muscle - assists supination (primary function is elbow flexion)
- origin: supraglenoid tubercle of scapula (long head), coracoid process of scapula (short head)
- insertion: radial tuberosity
Brachioradialis - assists pronation (primary function is elbow flexion)
- origin: lateral supracondylar ridge of humerus, lateral intermuscular septum of arm
- insertion: (proximal to) styloid process of radius
Clinical relations Anterior interosseous nerve syndrome, Erb's palsy, musculocutaneous nerve palsy, Monteggia fracture, Galeazzi fracture

[Glowupdiariesu]

Beautifully explained mam, thanks alot for your effort ❤

[moneshassan]

Thank you so much from Palestine 🇵🇸
It was really helpful and amazing, merci

[alfahadahmed]

Amazing video.very nicely explained. ❤️ Thank you ma'am.

[dr.priyankasingh]

Correction: in supination rotation occurs forwards and laterally .
In pronation rotation occurs backwards and medially.
(Note the movement of thumb)

[esahsaerah]

Okay, need help immediately

When we pronate the forearm, is the brachioradialis eccentric contraction, and the pronator teres and pronator quadratus are concentric contraction?

[adithyapatel]

Annular ligament is in the superior radio ulnar joint not inferior

[divyasharma]

Can we do proper forearm supination after orif fixation in distal radius