Table 3. Prevalence of hypertrophic thenar muscles and its associated course of the thenar motor branch.
| Study | n = (% HT) | HT thenar muscle | Non-HT thenar muscle | ||||
|---|---|---|---|---|---|---|---|
| ELn = (%) | SLn = (%) | TLn = (%) | ELn = (%) | SLn = (%) | TLn = (%) | ||
| Al-Qattan 2010 [6] | 100 (40.0) | 36(80.0) | 0 (0.0) | 9(20.0) | 30(46.9) | 34(53.1) | 0(0.0) |
| Green 2008 [10] | 1400 (27.6) | 299(77.5) | 29(7.5) | 58(15.0) | 0(0.0) | 1014(100.0) | 0(0.0) |
| Ahn 2000 [7] | 354 (8.5) | 20(66.7) | 7(23.3) | 3(10.0) | 320(98.8) | 3(0.9) | 1(0.3) |
| Hurwitz 1996 [22] | 80 (8.8) | 0(0.0) | 3(42.9) | 4(57.1) | 44(60.3) | 20(27.4) | 9(12.3) |
| Total n = (PP (%)) | 1934(18.2) | 355(64.7) | 39(11.8) | 74(23.4) | 394(50.2) | 1071(48.2) | 10(1.7) |
HT—hypertrophic; EL—Extraligamentous TMB; SL—Subligamentous TMB; TL—Transligamentous TMB; PP = pooled prevalence.