Traumatic brain injury claims arising from truck collisions often involve disagreement among medical professionals. One physician may conclude that a person sustained a lasting brain injury, while another may attribute the same symptoms to a different cause or describe the injury as less severe. Georgia law has an established framework for handling this kind of conflict. The framework rests on the roles assigned to the judge and the jury, the rules of evidence governing expert testimony, and the burden of proof that applies in civil cases.
Causation and the Burden of Proof
In a Georgia personal injury case, the plaintiff carries the burden of proving, by a preponderance of the evidence, that the defendant’s negligence caused the claimed injury. Preponderance of the evidence means that a fact is more likely true than not. Brain injuries are frequently described as difficult to demonstrate because they may not be visible on standard imaging and because symptoms can overlap with other conditions. As a result, expert medical testimony often plays a central role in establishing both the existence of an injury and its connection to the collision.
Admissibility Is Decided by the Judge
Before a jury ever weighs competing medical opinions, the trial judge decides whether each expert may testify at all. This admissibility question is governed by Georgia’s expert evidence statute, O.C.G.A. § 24-7-702. Under that statute, a witness qualified as an expert by knowledge, skill, experience, training, or education may give opinion testimony if the testimony is based upon sufficient facts or data, is the product of reliable principles and methods, and reflects a reliable application of those principles and methods to the facts of the case.
Georgia courts apply the analysis associated with the United States Supreme Court decision in Daubert v. Merrell Dow Pharmaceuticals and related federal authority when evaluating expert reliability in civil cases. O.C.G.A. § 24-7-702 directs Georgia courts to draw on federal case law interpreting the corresponding federal rule. The trial judge acts as a gatekeeper, screening out testimony that does not meet the reliability threshold. The statute allows the court to hold a pretrial hearing on these questions, and in civil proceedings such a hearing and ruling are to be completed by the time of the final pretrial conference.
It is important to recognize what the gatekeeping role is not. The judge does not decide which qualified expert is correct. The reliability inquiry concerns the methodology and foundation of the testimony, not the ultimate persuasiveness of the conclusion.
Conflict Resolution Is a Jury Function
Once competing expert opinions clear the admissibility threshold, the conflict between them becomes a question for the jury. Under Georgia law, the jury is the finder of fact in a civil jury trial, and weighing conflicting evidence, judging the credibility of witnesses, and resolving factual disputes are core jury functions. When one qualified physician testifies that a truck collision caused a traumatic brain injury and another qualified physician disagrees, the jury decides which testimony it finds more persuasive.
Georgia courts have long recognized that a conflict in the evidence, including conflicting expert testimony, does not entitle either side to a directed verdict or to judgment as a matter of law. A directed verdict is appropriate only where the evidence points so strongly in one direction that reasonable jurors could not differ. When the medical evidence genuinely conflicts, that standard is generally not met, and the case proceeds to the jury for resolution.
How the Jury Evaluates Competing Experts
In assessing conflicting medical opinions, a Georgia jury may consider a range of factors. These include each expert’s qualifications and area of specialization, the facts and data the expert relied upon, the examinations or testing the expert performed or reviewed, the methodology used, and the consistency of the opinion with other evidence in the case. Expert opinion testimony is not binding on the jury. Georgia law treats expert testimony as evidence to be weighed along with all other evidence, and the jury is free to accept or reject expert opinion in whole or in part.
In a brain injury case, the jury may also hear from treating physicians, neurologists, neuropsychologists who administer cognitive testing, and other professionals such as life-care planners. Lay testimony from family members, coworkers, and others who can describe a person’s functioning before and after the collision may be presented alongside the medical evidence. The jury considers the entire body of evidence in deciding the disputed questions of injury and causation.
The Role of Cross-Examination
The adversarial process is the principal tool Georgia courts rely upon for testing conflicting medical opinions. Each side may cross-examine the opposing party’s experts, probing the basis for an opinion, exploring alternative explanations for the symptoms, and highlighting any gaps in the underlying data. Cross-examination, the presentation of contrary evidence, and instruction by the court on the burden of proof are the traditional means by which a fact finder sorts through competing expert testimony. The existence of a respectable disagreement among experts is generally treated as a matter for the jury rather than a basis to exclude one side’s testimony.
Appellate Review
After a verdict, Georgia appellate courts give substantial deference to the jury’s resolution of conflicting evidence. An appellate court does not reweigh the evidence or substitute its judgment for that of the jury on factual questions. A jury verdict supported by some competent evidence will ordinarily be upheld, even where the medical testimony at trial was sharply divided. Trial court rulings on the admissibility of expert testimony are reviewed for abuse of discretion, a deferential standard that recognizes the trial judge’s gatekeeping role.
Conclusion
Georgia courts handle conflicting medical opinions in traumatic brain injury claims from truck accidents through a two-step structure. The trial judge first determines, under O.C.G.A. § 24-7-702 and the Daubert reliability analysis, whether each expert is qualified and whether each opinion rests on a reliable foundation. If competing opinions are both admissible, the conflict between them is a factual question reserved for the jury, which weighs the evidence under the preponderance standard. Cross-examination and contrary evidence are the means of testing each opinion, and a jury’s resolution of the dispute receives considerable deference on appeal.
Disclaimer
This article is provided strictly for general educational and informational purposes. It is intended to explain how Georgia law works as a matter of public legal education, and it does not constitute legal advice, a legal opinion, or a recommendation about any particular course of action. Reading this article, or contacting the website on which it appears, does not create an attorney-client relationship between the reader and any law firm, attorney, or author.
The law changes over time. Statutes, regulations, court rules, and judicial decisions discussed here may have been amended, repealed, superseded, or reinterpreted after the date of publication, and citations to specific code sections or cases reflect the law only as it was understood when this article was written. The application of any legal principle also depends heavily on the specific facts and circumstances of an individual matter, and outcomes vary from case to case.
For these reasons, no one should rely on this article as a substitute for advice from a licensed Georgia attorney who can review the particular facts involved. The author and publisher make no warranty, express or implied, regarding the accuracy, completeness, timeliness, or applicability of the information provided, and disclaim any liability for any action taken or not taken based on this content.