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Diffuse injury has more microscopic injury than macroscopic injury and is difficult to detect with CT and MRI, but its presence can be inferred when small bleeds are visible in the corpus callosum or the cerebral cortex. [34] MRI is more useful than CT for detecting characteristics of diffuse axonal injury in the subacute and chronic time ...
Vascular injury usually causes death shortly after an injury. [4] Although it is a diffuse type of brain injury itself, diffuse vascular injury is generally more likely to be caused by focal than diffuse injury. [4] Swelling, commonly seen after TBI, can lead to dangerous increases in intracranial pressure. [4] Though swelling itself is a ...
Diffuse axonal injury is caused by shearing forces on the brain leading to lesions in the white matter tracts of the brain. [31] These shearing forces are seen in cases where the brain had a sharp rotational acceleration, and is caused by the difference in density between white matter and grey matter. [32]
Closed head injury (coup contrecoup) can damage more than the impact sites on the brain, as axon bundles may be torn or twisted, blood vessels may rupture, and elevated intracranial pressure can distort the walls of the ventricles. [7] [10] [11] Diffuse axonal injury is a key pathology in concussive brain injury. [5] The visual system may be ...
Concussion involves diffuse (as opposed to focal) brain injury, meaning that the dysfunction occurs over a widespread area of the brain rather than in a particular spot. [56] It is thought to be a milder type of diffuse axonal injury, because axons may be injured to a minor extent due to stretching. [38]
Diffuse axonal injury may be associated with coma when severe, and poor outcome. [10] Following the acute stage, prognosis is strongly influenced by the patient's involvement in activity that promote recovery, which for most patients requires access to a specialised, intensive rehabilitation service.
Diffuse axonal injury, or DAI, usually occurs as the result of an acceleration or deceleration motion, not necessarily an impact. Axons are stretched and damaged when parts of the brain of differing density slide over one another. Prognoses vary widely depending on the extent of the damage.
In patients with mild TBI, the damage consists primarily of diffuse axonal injury (widespread damage to white matter) without any focal damage (damage to specific areas). Sometimes, injury of the brainstem was also observed. In these cases, there is likely the presence of an attentional deficit without a true amnesiac state.