Table 2.
Summary of Kinematic and Injury Data for Each Group
| Frequency (Hz) | Angular velocity (rad/sec) | Axonal injury (%) | Red cell neuronal/axonal change (%) | Total brain EAH (%) | CBF (mL/100 g-min) | |
|---|---|---|---|---|---|---|
| Group A (Episodic 6 h survival) | 2.36 ± 0.32* | 22.96 ± 2.61* | 0 (0%) | 0 (0%) | 0.33 ± 0.75% (20%) | - |
| Group BSAG (30 sec continuous 6 h survival) | 2.65 ± 0.24 | 22.51 ± 4.33* | 0.014 ± 0.034% (17%) | 0 (0%) | 0.20 ± 0.08% (33%) | - |
| Group BAXIAL (30 sec continuous 6 h survival) | 2.74 ± 0.23 | 28.52 ± 4.05 | 0 (0%) | 0 (0%) | 0 (0%) | - |
| Group C (10 sec continuous 24 h survival) | 2.94 ± 0.05 | 30.86 ± 0.77 | 0.13 ± 0.13% (100%) | 0 (0%) | 0.54 ± 0.63% (50%) | 74.93 ± 15.87 |
| Group D (30 sec continuous 24 h survival) | 2.86 ± 0.02 | 28.54 ± 2.67 | 0.067 ± 0.17% (25%) | 0.044 ± 0.052% (50%) | 2.40 ± 5.23% (50%) | 45.48 ± 20.01 |
| Group E (Double continuous 24 h survival) | 2.76 ± 0.17 | 28.75 ± 3.02 | 0.13 ± 0.16% (56%) | 0.082 ± 0.074%# (67%) | 2.70 ± 3.99% (67%) | 48.27 ± 13.80 |
| Group F (30 sec continuous 6 day survival) | 2.91 ± 0.10 | 28.41 ± 3.87 | 0.090 ± 0.085% (80%) | 0.004 ± 0.009% (25%) | 1.24 ± 2.69% (40%) | 64.53 ± 16.11 |
| Group G (noncyclic 6 h survival) | - | 32.19 ± 7.04 | 0 (0%) | 0 (0%) | 0 (0%) | - |
| Group H (noncyclic 24 h survival) | - | 42.86 ± 6.45* | 0.028 ± 0.059% (33%) | 0 (0%) | 0 (0%) | - |
| Shams | - | - | 0 (0%) | 0 (0%) | 0 (0%) | 58.13 ± 3.33 |
EAH, extra-axial hemorrhage; CBF, cerebral blood flow; Sag, saggital.
*
Significantly (p < 0.05) different than other groups in column.
#
Significantly (p < 0.05) different than shams.
-Measurement not applicable or not collected.
Animals without injury were given a value of zero and included in the averages ± standard deviation. Parentheses indicate the percentage of animals in the group with the injury. CBF units are mL/min/100 g tissue.