Table 1 Classification of Types and Subtypes of the palmaris longus muscle
Type | Inclusion criteria for the type | Subtype | Inclusion criteria for the subtype |
|---|---|---|---|
Type I | • origin of the muscular part of the medial epicondyle of the humerus • the tendon was inserted to the palmar aponeurosis | A | Tendon to muscle ratio < 1 |
B | Tendon to muscle ratio 1–1,5 | ||
C | Tendon to muscle ratio > 1,5 | ||
Type II | • origin of the muscular part of the medial epicondyle of the humerus • the tendon was bifurcated (lateral and medial division); the lateral division was inserted to the palmar aponeurosis, and medial division was inserted to the flexor retinaculuum of the wrist | A | Tendon to muscle ratio < 1 |
B | Tendon to muscle ratio 1–1,5 | ||
C | Tendon to muscle ratio > 1,5 | ||
Type III | “Rare variants” non-conforming definition Types I and II | ||