Table 4.
Comparison of measurements between types I and II of the palmaris longus muscle
| Morphometric parameter | Type of the palmaris longus | p-value | |
|---|---|---|---|
| Type I | Type II | ||
| Forearm length [mm] | 254.8 (24.3) | 252.0 (13.6) | 0.7181 |
| Forearm circumference [mm] | 212.5 (24.8) | 217.2 (22.0) | 0.5107 |
| Width between processes | 55.4 (4.2) | 54.1 (4.0) | 0.2788 |
| Thickness between processes | 163.9 (21.4) | 170.2 (15.5) | 0.1883 |
| The length of the belly | 115.0 (21.6) | 107.4 (19.5) | 0.1510 |
| The length of the tendon | 155.9 (29.4) | 140.0 (32.7) | 0.2614 |
| The thickness of the tendon at the ‘muscle-tendon’ junction | 1.7 (0.7) | 2.2 (0.7) | 0.0831 |
| The width of the tendon at the ‘muscle-tendon’ junction | 3.7 (1.6) | 4.0 (1.7) | 0.9361 |
| The thickness of the tendon at the insertion point | 2.1 (1.0) | 1.6 (0.4) | 0.0905 |
| The width of the tendon at the insertion point | 4.4 (1.4) | 3.0 (1.0) | 0.0018 |
| The width of the central portion of the tendon | 4.0 (1.2) | 3.4 (1.2) | 0.1216 |
| The width of the tendon where the tendon crosses the median nerve | 3.9 (0.9) | 3.4 (1.7) | 0.4222 |
| The thickness of the tendon where the tendon crosses the median nerve | 1.2 (0.4) | 1.1 (0.2) | 0.7788 |
| Distance from the midportion of the interstyloid line to the point where the median nerve crosses the tendon | 32.0 (7.4) | 28.5 (5.8) | 0.3773 |