Table 4.
Meta-analysis of reports on the inter-hemispheric patterns of Heschl’s gyri
| N | Inter-hemispheric gyrification pattern % (N) | Global agreement | Higher rate of R duplication | ||||
|---|---|---|---|---|---|---|---|
| L1/R1 | L1/R2 | L2/R1 | L2/R2 | ||||
| Von Economo and Horn (1930) | 11 | 18.2 (2) | 54.5 (6) | 18.2 (2) | 9.1 (1) | ||
| Campain and Minckler (1976) | 29 | 10.3 (3) | 48.3 (14) | 3.5 (1) | 37.9 (11) | ||
| Musiek and Reeves (1990) | 28 | 17.9 (5) | 21.4 (6) | 25.0 (7) | 35.7 (10) | ||
| Rademacher et al. (1993) | 9 | 44.4 (4) | 22.2 (2) | 33.3 (3) | 0 | ||
| Penhune et al. (1996) | 40 | 65.0 (26) | 15.0 (6) | 15.0 (6) | 5.0 (2) | ||
| Wong et al. (2008) | 17 | 23.5 (4) | 23.5 (4) | 23.5 (4) | 29.5 (5) | ||
| Tahmasebi et al. (2010) | 20 | 15.0 (3) | 30.0 (6) | 5.0 (1) | 50.0 (10) | ||
| Da Costa et al. (2011) | 10 | 20.0 (2) | 30.0 (3) | 20.0 (2) | 30.0 (3) | ||
| Sub-total | 164 | 29.9 (49) | 28.7 (47) | 15.9 (26) | 25.5 (42) | Κ = 0.12 | p = 2.10−2 |
| Range | [9, 40] | [10.3, 65.0] | [15.0, 54.5] | [3.5, 33.3] | [0, 50.0] | p = 0.10 | |
| Present study | 232 | 36.2 (84) | 27.2 (63) | 15.1 (35) | 21.5 (50) | Κ = 0.15 | p = 6.10−3 |
| p = 0.02 | |||||||
| Total | 396 | 33.6 (133) | 27.8 (110) | 15.4 (61) | 23.2 (92) | Κ = 0.14 | p = 2.10−4 |
| p = 0.004 | |||||||
Global agreement between the numbers of left and right HG is assessed by a Kappa test and hemispheric duplication occurrence with a McNemar’s test
L left, R right, Κ kappa