Anatomy of the forearm

1. ELBOW AND
FOREARM
RANETTE VARGAS, PTRP
RAMVargas, PTRP | 2019
•ANTERIOR SURFACE
Lateral Supracondylar Ridge
Medial Supracondylar Ridge
Lateral Epicondyle
Medial Epicondyle
Capitulum
Trochlea
Trochlear Groove
Radial Fossa
Coronoid Fossa
DISTAL HUMERUS
RAMVargas, PTRP | 2019 RAMVargas, PTRP | 2019
•POSTERIOR SURFACE
 Medial Epicondyle
 Lateral Epicondyle
 Olecranon Fossa
DISTAL HUMERUS
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3 4

2. RAMVargas, PTRP | 2019
•ANTERIOR SURFACE
 Trochlear Notch
 Trochlear Ridge
 Coronoid Process
 Radial Notch of Ulna
 Tuberosity of Ulna
 Anterior Shaft of Ulna
 Interosseous Margin of Ulna
 Styloid Process of Ulna
RAMVargas, PTRP | 2019
ULNA
•POSTERIOR SURFACE
 Olecranon Process
 Shaft of Ulna
 Supinator Crest
RAMVargas, PTRP | 2019
ULNA
• Head of Radius
• Neck of Radius
• Bicipital Tuberosity
• Shaft of Radius
• Interosseous Margin
• Radial Styloid Process
• Lister’s Tubercle
• Ulnar Notch
RAMVargas, PTRP | 2019
RADIUS
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3. RAMVargas, PTRP | 2019 RAMVargas, PTRP | 2019
•AKA:
•Formed by:
•Normal Angle:
 Female:
 Male:
•Greater:
•Lesser:
CUBITAL ANGLE
RAMVargas, PTRP | 2019
•Boundaries:
 Laterally:
 Medially:
•Roof:
•Base:
•Floor:
 Laterally:
 Medially:
•Contents:
CUBITAL FOSSA
RAMVargas, PTRP | 2019
1. Elbow joint
• Type of Joint:
• Articulation:
• Motions:
2. Superior Radioulnar Joint
• Type of Jt:
• Articulation:
3. Distal Radioulnar Joint
• Type of Jt:
• Articulation:
JOINTS
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11 12

4. RAMVargas, PTRP | 2019
1. Medial collateral ligament
• AKA:
• Portions:
• Restricts:
2. Lateral collateral ligament
• AKA:
• Portions:
• Restricts:
LIGAMENTS OF THE ELBOW
RAMVargas, PTRP | 2019
• Formed by:
• Passage for:
CUBITAL TUNNEL
RAMVargas, PTRP | 2019
1. Annular Ligament
• AKA:
• Attachments:
• Importance:
2. Quadrate Ligament
• Attachments:
3. Oblique Cord
• Attachments:
LIGAMENTS OF THE PROXIMAL
RADIOULNAR JOINT
RAMVargas, PTRP | 2019
1. Palmar & Dorsal Radioulnar ligament
• Attachments:
2. Triangular fibrocartilage complex
• Attachments:
LIGAMENTS OF THE DISTAL
RADIOULNAR JOINT
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15 16

5. RAMVargas, PTRP | 2019
ELBOW FLEXORS
MUSCLE ORIGIN INSERTION INNERVATION ACTION
Biceps brachii
Long head: Bicipital aponeurosis
to radial tuberosity
Short head:
Brachialis Elbow flexion
Brachioradialis Lateral
supracondylar
ridge
Radial nerve
RAMVargas, PTRP | 2019
ELBOW EXTENSORS
MUSCLE ORIGIN INSERTION INNERVATION ACTION
Triceps brachii Long head: Elbow extension
Lateral head:
Medial head:
Anconeus Lateral epicondyle
of humerus
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19 20

6. RAMVargas, PTRP | 2019
FOREARM PRONATORS
MUSCLE ORIGIN INSERTION INNERVATION ACTION
Pronator
Teres
Humeral head:
Lateral aspect of
shaft of radius
Ulnar head:
Pronator
Quadratus
Anterior surface
of distal ulna
RAMVargas, PTRP | 2019
FOREARM SUPINATORS
MUSCLE ORIGIN INSERTION INNERVATION ACTION
Supinator
Lateral
epicondyle,
annular ligament,
supinator crest
Deep branch of
radial nerve
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