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Preclusion of bio-mechanical opinion
Causation

Preclusion of bio-mechanical opinion

By Jason Tenenbaum 8 min read

Key Takeaway

Dovberg v Laubach case analysis: Second Department precludes biomechanical expert testimony lacking proper foundation in peer-reviewed literature and empirical data.

This article is part of our ongoing causation coverage, with 132 published articles analyzing causation issues across New York State. Attorney Jason Tenenbaum brings 24+ years of hands-on experience to this analysis, drawing from his work on more than 1,000 appeals, over 100,000 no-fault cases, and recovery of over $100 million for clients throughout Nassau County, Suffolk County, Queens, Brooklyn, Manhattan, and the Bronx. For personalized legal advice about how these principles apply to your specific situation, contact our Long Island office at (516) 750-0595 for a free consultation.

Dovberg v Laubach, 2017 NY Slip Op 07238 (2d Dept. 2017)

(1) “Prior to the commencement of a trial on the issue of damages, the defendants served an expert witness disclosure notice pursuant to CPLR 3101(d), advising the plaintiff that they intended to call Dr. Alfred Bowles, a biomechanical engineer and board-certified surgeon, who would testify that the force generated by the accident could not have caused any of the plaintiff’s alleged knee injuries, and that those alleged injuries were the result of wear and tear from athletic [*2]activities. The expert disclosure notice indicated that the proposed testimony would be based upon Bowles’s review of deposition testimony and the plaintiff’s medical records. The plaintiff moved in limine to preclude Bowles from testifying, arguing that his proposed testimony was speculative and without basis in fact, and that the expert disclosure notice did not make reference to any empirical data that Bowles may have relied upon, or any peer-reviewed journals, studies, treatises, or texts showing that an accident that does not meet a specific severity threshold cannot cause injury. In opposition, the defendants alleged that Bowles’s testimony would be based on scholarly works that were published in the fields of medicine and biomedical engineering, and had gained general acceptance in those fields.  In support of this claim, the defendants listed the names of three works, which, according to their titles, involved head, neck, and mandible injuries. The authors, years of publication, and contents of these works were not set forth.”

(2) “The Supreme Court denied the plaintiff’s motion, and permitted Bowles to testify at the damages trial.  Bowles thereafter testified that in his opinion, with a reasonable degree of engineering certainty, the force generated by a low speed rear-end collision that propelled a vehicle into a 2000 Ford Taurus would not have caused the driver of the Ford Taurus to hit her knees against the dashboard. In reaching his conclusion, Bowles relied upon the defendant driver’s deposition testimony that he was driving at a speed of no more than 10 miles per hour at the time of the collision, and the plaintiff’s deposition testimony that she was driving at a speed of 3 to 5 miles per hour.  Although Bowles did not know how close the plaintiff’s seat was positioned to the steering wheel and dashboard at the time of the accident, he maintained that moving the seat up would not increase the likelihood of a driver’s knees hitting the dashboard in a rear-end collision. At the conclusion of the damages trial, the jury returned a verdict finding that the accident was not a substantial factor in causing the injuries alleged by the plaintiff. The plaintiff then moved to set aside the verdict as contrary to the weight of the evidence and for a new trial, and the Supreme Court denied the motion. A judgment in favor of the defendants was subsequently entered, and the plaintiff appeals.”

….

(3)… “The expert disclosure notice simply stated that Bowles analyzed “the medical and engineering aspects of the accident.While the defendants cited to three works in opposition to the motion in limine, they did not identify the [*3]authors, years of publication, and contents of those works, or any explanation as to their relevance in evaluating the cause of knee injuries. Moreover, the defendants provided no description of the methodology Bowles utilized to determine the force of the accident, and the biomechanical engineering principles he relied upon in reaching his conclusion that the force generated by the accident could not have caused the plaintiff’s knees to come into contact with the vehicle dashboard. Under these circumstances, the Supreme Court should have granted the plaintiff’s motion to the extent of precluding Bowles from offering his opinion testimony that the force generated by the accident could not have caused the plaintiff’s knee injuries (see Saulpaugh v Krafte, 5 AD3d 934; cf. Valentine v Grossman, 283 AD2d 571). Accordingly, we reverse the judgment and remit the matter to the Supreme Court, Suffolk County, for a new trial on the issue of damages.”

It is interesting to see a more robust review of what is required to allow a bio-mechanical engineer give testimony on the basis of a 3101(d).  It would appear to me that a report with relevant and appropriate citations to the principles set forth herein would be the best way to go about this.

Legal Context

Why This Matters for Your Case

New York law is among the most complex and nuanced in the country, with distinct procedural rules, substantive doctrines, and court systems that differ significantly from other jurisdictions. The Civil Practice Law and Rules (CPLR) governs every stage of civil litigation, from service of process through trial and appeal. The Appellate Division, Appellate Term, and Court of Appeals create a rich and ever-evolving body of case law that practitioners must follow.

Attorney Jason Tenenbaum has practiced across these areas for over 24 years, writing more than 1,000 appellate briefs and publishing over 2,353 legal articles that attorneys and clients rely on for guidance. The analysis in this article reflects real courtroom experience — from motion practice in Civil Court and Supreme Court to oral arguments before the Appellate Division — and a deep understanding of how New York courts actually apply the law in practice.

About This Topic

Causation in New York Personal Injury & No-Fault Law

Causation — proving that the defendant's negligence or the accident caused the plaintiff's injuries — is an essential element of every personal injury and no-fault claim. New York courts distinguish between proximate cause, intervening causes, and pre-existing conditions that may have been aggravated by an accident. The legal standards for establishing causation through medical evidence and the defenses available to challenge causal connection are analyzed in depth across these articles.

132 published articles in Causation

Common Questions

Frequently Asked Questions

How is causation established in New York personal injury cases?

Causation requires proof that the defendant's conduct was a substantial factor in causing the plaintiff's injuries. In motor vehicle and slip-and-fall cases, medical experts typically establish causation through review of the patient's medical history, diagnostic imaging, clinical examination findings, and the temporal relationship between the accident and the onset of symptoms. The plaintiff must also address any pre-existing conditions and demonstrate that the accident was a proximate cause of the current complaints.

Can medical journals and treatises be used as evidence in New York?

Under New York law, learned treatises and medical journals can be used during cross-examination of expert witnesses to challenge their opinions. However, they generally cannot be introduced as independent evidence. The expert must acknowledge the authority of the text or it must be established through other testimony.

How are expert journals used in no-fault cases?

In no-fault litigation, medical journals and peer-reviewed studies are commonly referenced in peer review reports and IME findings to support or challenge medical necessity determinations. They help establish the standard of care and accepted treatment protocols.

What is the Frye standard for expert testimony in New York?

New York follows the Frye standard (not Daubert) for expert testimony. Under Frye v. United States, expert testimony based on scientific principles must be shown to be generally accepted in the relevant scientific community. This standard applies to novel scientific evidence and methodologies.

How are expert witnesses used in New York personal injury cases?

Expert witnesses provide specialized opinion testimony that helps the court or jury understand complex issues like medical causation, injury severity, future care needs, economic losses, and engineering defects. Under New York law, expert testimony must be based on facts in evidence, the expert's professional knowledge, or a combination of both. The expert must be qualified by training, education, or experience in the relevant field. Expert disclosure requirements under CPLR 3101(d)(1)(i) require parties to identify their experts and provide detailed summaries before trial.

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Attorney Jason Tenenbaum

About the Author

Jason Tenenbaum, Esq.

Jason Tenenbaum is the founding attorney of the Law Office of Jason Tenenbaum, P.C., headquartered at 326 Walt Whitman Road, Suite C, Huntington Station, New York 11746. With over 24 years of experience since founding the firm in 2002, Jason has written more than 1,000 appeals, handled over 100,000 no-fault insurance cases, and recovered over $100 million for clients across Long Island, Nassau County, Suffolk County, Queens, Brooklyn, Manhattan, the Bronx, and Staten Island. He is one of the few attorneys in the state who both writes his own appellate briefs and tries his own cases.

Jason is admitted to practice in New York, New Jersey, Florida, Texas, Georgia, and Michigan state courts, as well as multiple federal courts. His 2,353+ published legal articles analyzing New York case law, procedural developments, and litigation strategy make him one of the most prolific legal commentators in the state. He earned his Juris Doctor from Syracuse University College of Law.

24+ years in practice 1,000+ appeals written 100K+ no-fault cases $100M+ recovered

Disclaimer: This article is published by the Law Office of Jason Tenenbaum, P.C. for informational and educational purposes only. It does not constitute legal advice, and no attorney-client relationship is formed by reading this content. The legal principles discussed may not apply to your specific situation, and the law may have changed since this article was last updated.

New York law varies by jurisdiction — court decisions in one Appellate Division department may not be followed in another, and local court rules in Nassau County Supreme Court differ from those in Suffolk County Supreme Court, Kings County Civil Court, or Queens County Supreme Court. The Appellate Division, Second Department (which covers Long Island, Brooklyn, Queens, and Staten Island) and the Appellate Term (which hears appeals from lower courts) each have distinct procedural requirements and precedents that affect litigation strategy.

If you need legal help with a causation matter, contact our office at (516) 750-0595 for a free consultation. We serve clients throughout Long Island (Huntington, Babylon, Islip, Brookhaven, Smithtown, Riverhead, Southampton, East Hampton), Nassau County (Hempstead, Garden City, Mineola, Great Neck, Manhasset, Freeport, Long Beach, Rockville Centre, Valley Stream, Westbury, Hicksville, Massapequa), Suffolk County (Hauppauge, Deer Park, Bay Shore, Central Islip, Patchogue, Brentwood), Queens, Brooklyn, Manhattan, the Bronx, Staten Island, and Westchester County. Prior results do not guarantee a similar outcome.

Jason Tenenbaum, Personal Injury Attorney serving Long Island, Nassau County and Suffolk County

About the Author

Jason Tenenbaum

Jason Tenenbaum is a personal injury attorney serving Long Island, Nassau & Suffolk Counties, and New York City. Admitted to practice in NY, NJ, FL, TX, GA, MI, and Federal courts, Jason is one of the few attorneys who writes his own appeals and tries his own cases. Since 2002, he has authored over 2,353 articles on no-fault insurance law, personal injury, and employment law — a resource other attorneys rely on to stay current on New York appellate decisions.

Education
Syracuse University College of Law
Experience
24+ Years
Articles
2,353+ Published
Licensed In
7 States + Federal

Legal Resources

Understanding New York Causation Law

New York has a unique legal landscape that affects how causation cases are litigated and resolved. The state's court system includes the Civil Court (for claims up to $25,000), the Supreme Court (the primary trial court for unlimited jurisdiction), the Appellate Term (which hears appeals from lower courts), the Appellate Division (divided into four Departments, with the Second Department covering Long Island, Brooklyn, Queens, Staten Island, and several upstate counties), and the Court of Appeals (the state's highest court). Each court has its own procedural requirements, local rules, and case-assignment practices that can significantly impact the outcome of your case.

For causation matters on Long Island, cases are typically filed in Nassau County Supreme Court (at the courthouse in Mineola) or Suffolk County Supreme Court (in Riverhead). No-fault arbitrations are heard through the American Arbitration Association, which assigns arbitrators throughout the metropolitan area. Workers' compensation claims go to the Workers' Compensation Board, with hearings at district offices across the state. Understanding which forum is appropriate for your case — and the specific procedural rules that apply — is essential for a successful outcome.

The procedural landscape in New York also includes important timing requirements that can affect your case. Most civil actions are subject to statutes of limitations ranging from one year (for intentional torts and claims against municipalities) to six years (for contract actions). Personal injury cases generally have a three-year deadline under CPLR 214(5), while medical malpractice claims must be filed within two and a half years under CPLR 214-a. No-fault insurance claims have their own regulatory deadlines, including 30-day filing requirements for applications and 45-day deadlines for provider claims. Understanding and complying with these deadlines is critical — missing a filing deadline can permanently bar your claim, regardless of how strong your case may be on the merits.

Attorney Jason Tenenbaum regularly practices in all of these venues. His office at 326 Walt Whitman Road, Suite C, Huntington Station, NY 11746, is centrally located on Long Island, providing convenient access to courts and offices throughout Nassau County, Suffolk County, and New York City. Whether you need representation in a no-fault arbitration, a personal injury trial, an employment discrimination hearing, or an appeal to the Appellate Division, the Law Office of Jason Tenenbaum, P.C. brings $24+ years of real courtroom experience to your case. If you have questions about the legal issues discussed in this article, call (516) 750-0595 for a free, no-obligation consultation.

New York's substantive law also presents distinct challenges. In motor vehicle cases, the no-fault system under Insurance Law Article 51 provides first-party benefits regardless of fault, but limits the right to sue for non-economic damages unless the plaintiff establishes a "serious injury" under one of nine statutory categories. This threshold — codified at Insurance Law Section 5102(d) — requires medical evidence showing more than a minor or subjective injury, and courts have developed detailed standards for each category. Fractures must be documented through imaging studies. Claims of permanent consequential limitation or significant limitation of use require quantified range-of-motion testing with comparison to norms. The 90/180-day category demands proof that the plaintiff was unable to perform substantially all of their usual daily activities for at least 90 of the 180 days following the accident.

In employment discrimination cases, the legal standards vary depending on whether the claim arises under state or local law. The New York State Human Rights Law employs a burden-shifting framework: the plaintiff must first establish a prima facie case by showing membership in a protected class, qualification for the position, an adverse employment action, and circumstances giving rise to an inference of discrimination. The burden then shifts to the employer to articulate a legitimate, non-discriminatory reason for its decision. If the employer meets this burden, the plaintiff must demonstrate that the stated reason is pretextual. The New York City Human Rights Law, by contrast, applies a broader standard, asking whether the plaintiff was treated less well than other employees because of a protected characteristic.

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