Elbow Flashcards
Supracondylar Ridge
On lateral side
Carrying Angle
Oblique groove of trochlea –> valgus angle of elbow.
Bring arm toward face in flexion, away from midline in extension
11-14 degrees in males
13-16 degrees in females
Gunstock Deformity
Reduction in carrying angle
Biceps tendon inserts:
Radial/ bicipital tuberosity
Radial Head
- Doesn’t contact humerus in full extension
- Spins on capitulum and radial notch of ulna
- Radial nerve runs right here
- Vulnerable to fx with direct impact or by compression with FOOSH
- Supported by extensor wad and annular ligament
Most functional movement of the elbow
Flexion
Functional ROM: 30-130
Humeroulnar joint
Modified sellar
Close-packed = extension
Radiohumeral joint
Modified ovoid
Close-packed = flexion
*No contact in extension
What type of glides increase elbow extension?
A–> P
What type of glides increase elbow flexion?
P–>A
Ulnar Collateral Ligament
Three parts:
- Anterior Oblique (primary stabilizer, taut in all ranges)
- Posterior Oblique (Taut in flexion)
- Transverse (stabilizes ulnar n.)
Resists valgus force
Vascular/ innervated –> Painful
UCL Injury
Medial Traction: UCL, Flexor tendon, Ulnar Nerve
Posterior Compression: Olecranon (fossa)
Lateral Compression: Capitulum, radial head
Radial Collateral Ligament
Prevents Varus stretch
Poorly defined
Reinforced by annular ligament
Brachioradialis
Largest flexor muscle mass
Most efficient in neutral forearm
Radial nerve
Biceps Brachii
Flexes elbow and supinates forearm
Most effective in supination
Musculocutaneous nerve