Table 2.
Comparison of the striatal arginine baseline with its evolution in nitrogen at 3 MPa (n = 6), in helium at 3MPa (n = 8), at atmospheric pressure with NMDA (2 mM) retrodialysis in the striatum (n = 8), or in nitrogen exposure with NMDA retrodialysis in the striatum (n = 6), at atmospheric pressure with KCL (100 mM) and Saclofen (1 mM) retrodialysis in the PFC (n = 9), or in nitrogen exposure with KCL and Saclofen retrodialysis in the PFC (n = 9).
| Arginine | Control groups | 3MPa Nitrogen groups | Comparison | |||
|---|---|---|---|---|---|---|
| Comp. | 180 Minutes exposure Median (1st _ 3rd quartile) | Comp. | 180 Minutes exposure Median (1st _ 3rd quartile) | p-value | ||
| p-value | p-value post hoc test | p-value | p-value post hoc test | comp | Stay | |
| Helium at 3MPa (1)/Nitrogen (2) n = 8/6 | 0.031 | 100.8 (84.0_115.2) 0.820 | 0.895 | 93.7 (83.1_98.4) 0.031 | 0.008 | < 0.001 |
| NMDA retrodialysis (3_4) n = 8/6 | 0.113 | 131.8 (103.6_192.2) < 0.001 | 1.000 | 71.7 (46.3_121.1) 0.013 | 0.758 | < 0.001 |
| PFC retrodialysis (5_6) n = 9/9 | 0.141 | 21.3 (3.4_47.7) < 0.001 | 0.426 | 28.4 (8.1_62.4) < 0.001 | 0.709 | 0.188 |
-1- Baselines and periods at maximum pressure (but not the compression stage) were described using median and quartile. -2- The arginine baseline was compared with the compression stage (up to 3MPa-"Comp.") and to a maximum pressure period (at 3MPa-"180 minutes exposure") using a Kruskal-Wallis test (p-values were noted, α = 5%), followed by a post-hoc test transcribed by squares. Each square represents a string of samples (~median value) that must be compared with the baseline samples, arranged in chronological order: 2 squares for 2 series of samples available during the compression stage (or simili); 9 squares for 9 series of samples available during the stay at the maximum pressure (or simili). Dark squares indicate a significant difference, as indicated by a post-hoc Dunn test (α = 5%), between samples at the corresponding time point and its baseline. White squares indicate no significant difference between the string of samples at the corresponding time point and the baseline. The compression stages (up to 3MPa) and the maximum pressure period (3MPa) of the control groups and the 3MPa nitrogen group were compared with each other, using a Kruskal-Wallis test (α = 5%). P-values were noted.