How Do You Prove a TBI for a Motorcycle Accident Case in California?

 Posted on August 29, 2025 in Car Accidents

Traumatic brain injuries (TBIs) can significantly change your life, from your work to your sleep and mood. Insurance companies may question the diagnosis or argue that your symptoms are unrelated to the crash. To win a California motorcycle case, you must prove that you suffered a brain injury, that another party was at fault, and that the injury harms your daily life and future. The right evidence, experts, and legal strategy make that possible, and you should contact an experienced Los Angeles, CA catastrophic injuries lawyer for assistance.

What Evidence Do You Need To Prove a Traumatic Brain Injury?

Evidence commonly used to prove that a motorcycle accident resulted in a TBI includes:

• Medical records and testing: ER notes, CT or MRI scans, Glasgow Coma Scale scores, concussion clinic records, and neuropsychological testing document the injury.

• Crash scene documentation: Police reports, 911 audio files, body-cam or dash-cam footage, traffic-cam footage, and photos of the bike and roadway can reveal how the impact happened.

• Helmet and gear evidence: Photos of helmet dents, cracked visors, or chin-bar scrapes help link the impact to your symptoms.

• Witness statements: Bystanders and first responders can attest to your condition after the crash.

• Legal violations by the driver: If another driver broke a safety rule and that violation caused the crash, California Evidence Code § 669 can create a presumption of negligence.

Demonstrating How a TBI Impacts Your Daily Life for a California Accident Claim

There are several ways to highlight how your injury impacts your life. Keep a simple symptom journal that notes things like headaches, dizziness, light sensitivity, memory lapses, and mood changes. Ask family, friends, and coworkers to record what they observe, such as missed tasks, personality shifts, or trouble multitasking. Save emails and HR notes about reduced hours or workplace accommodations. 

If you are a student, keep school records, attendance and absence records, and tutoring notes. Track therapy, medications, and sleep problems. Use photos or short videos to show difficulty with chores, driving, or hobbies you once enjoyed. Layered, everyday proof helps an adjuster, judge, or jury understand the real impact of the injury.

How Can Expert Testimony Support Your Claim?

Experts turn complex medical information into plain language. For example, a neurologist may be able to explain your diagnosis and treatment plan, and a neuropsychologist could test attention, memory, and processing speed.

An accident reconstructionist might be able to connect the crash to head trauma, and a vocational expert could show how the TBI affects your ability to work. Together, these opinions link the impact, the injury, and your losses.

Schedule a Free Consultation With a Los Angeles, CA Catastrophic Injury Attorney

A motorcycle-related TBI is a serious injury that can have long-lasting physical, emotional, and financial implications. If you or a loved one suffered this or any other type of severe injury due to another person’s negligence, you deserve focused medical care and a legal team that knows how to prove it.

Tahmazian Law Firm, P.C. is a family firm led by founder Jilbert Tahmazian, who brings over 30 years of experience to every case. Our team works with top neurologists and life-care planners, preserves key video and helmet evidence, and presents your story so adjusters and jurors understand the full impact. Our LA County, CA motorcycle accident lawyers offer free consultations. Call us at 818-242-8201 today to learn the next steps toward recovery and fair compensation.