Table 1.
Mean Values of Mechanical Parameters Estimated at 877.5 Hz for Each Injury Severity in Different Regions of the Brain and at Different Time Points following the Injury
| Before injury | Immediate | 24 h | 7 days | 28 days | |||
|---|---|---|---|---|---|---|---|
| TBI 0.5 mm (n=5) | Region of impact | Stiffness (kPa) | 9.0 | 7.1 | 7.5 | 8.8 | 9.0 |
| Storage modulus (kPa) | 5.6 | 4.1 | 4.7 | 5.7 | 5.5 | ||
| Loss modulus (kPa) | 4.5 | 3.6 | 3.8 | 4.4 | 4.5 | ||
| Away from impact | Stiffness (kPa) | 9.0 | 9.3 | 9.7 | 9.6 | 9.3 | |
| Storage modulus (kPa) | 5.8 | 5.8 | 6.4 | 6.2 | 5.8 | ||
| Loss modulus (kPa) | 4.4 | 4.7 | 4.7 | 4.6 | 4.6 | ||
| TBI 0.75 mm (n=5) | Region of impact | Stiffness (kPa) | 9.4 | 6.8 | 7.9 | 8.2 | 8.9 |
| Storage modulus (kPa) | 5.8 | 4.1 | 5.0 | 5.1 | 5.3 | ||
| Loss modulus (kPa) | 4.6 | 3.4 | 4.0 | 4.1 | 4.6 | ||
| Away from impact | Stiffness (kPa) | 9.5 | 9.5 | 10.2 | 10.0 | 9.6 | |
| Storage modulus (kPa) | 6.2 | 5.9 | 6.6 | 6.6 | 6.1 | ||
| Loss modulus (kPa) | 4.6 | 4.7 | 5.0 | 4.9 | 4.7 |
The standard deviation values, not depicted here, were all ranging from 10% to 22%.
TBI, traumatic brain injury.