Proving a traumatic brain injury that does not appear on standard imaging is one of the more difficult evidentiary tasks in Georgia injury litigation. The core problem is that the injury is largely invisible and many of its symptoms are subjective, so the case is generally built on neuropsychological testing, expert testimony, and documented before-and-after changes rather than a single objective image.
The limits of imaging
Severe brain injuries may be visible on a CT or MRI scan, showing hemorrhages or contusions, but many mild to moderate injuries, including concussions, produce no visible structural damage on standard neuroimaging. Advanced techniques such as diffusion tensor imaging and functional MRI can sometimes reveal microstructural changes, but their admissibility and conclusiveness vary, and such methods are screened for reliability under the standard that governs expert evidence (O.C.G.A. § 24-7-702). The absence of a clear image on a routine scan is a recurring hurdle.
Subjective symptoms and causation
Many symptoms of a brain injury, including headaches, dizziness, memory and cognitive deficits, mood changes, fatigue, and sleep disturbance, are reported by the injured person rather than measured directly. That makes them easy to challenge without corroboration. Causation adds a further difficulty, because linking a seemingly modest physical impact to a complex brain injury is harder when symptoms can be delayed in onset.
The defense frequently attributes symptoms to pre-existing conditions, such as prior anxiety, depression, or a learning difference, which makes a careful review and differentiation of the medical history important.
Building the proof
Because no single test resolves the question, these cases rely on corroboration across several sources. Neuropsychological testing assesses deficits in memory, attention, and executive function. Neurological examination can document subtle impairments. Treating physicians and neurologists connect the symptoms to the trauma, and a neuropsychologist may interpret the cognitive results and offer opinions on causation and prognosis.
Lay testimony plays a meaningful role as well. Family members, friends, and coworkers can describe observable changes in personality, cognitive ability, and daily functioning before and after the incident, giving real-world context to an injury that does not show on a scan. The consistency of symptoms over time, as reflected in medical records and contemporaneous notes, further supports the claim against assertions of exaggeration. Taken together, these forms of evidence are what allow an invisible injury to be demonstrated.