Gray and white matter mean volumes (in mm3) of the insula by group (SD in parentheses)
| Region | Tissue | Hearing | Deaf | Hearing signers |
|---|---|---|---|---|
| Left insula | GM | 7762 (1095) | 8426 (1182) | 7609 (734) |
| WM | 697 (254) | 690 (208) | 762 (286) | |
| Right insula | GM | 7762 (1046) | 7998 (1021) | 7366 (755) |
| WM | 1376 (330) | 1644 (324) | 1595 (274) | |
| Left anterior insula | GM | 5116 (820) | 5426 (808) | 5057 (549) |
| WM | 505 (189) | 471 (153) | 527 (215) | |
| Left posterior insula | GM | 2645 (452) | 2999 (522) | 2552 (388) |
| WM | 192 (126) | 219 (84) | 235 (101) | |
| Right anterior insula | GM | 4958 (721) | 5181 (702) | 4750 (620) |
| WM | 868 (276) | 1003 (231) | 979 (209) | |
| Right posterior insula | GM | 2804 (494) | 2808 (493) | 2616 (262) |
| WM | 508 (117) | 640 (172) | 616 (109) |
GM, Gray matter; WM, white matter.