- Level I – Complete absence of any response to stimuli. - Level II – General, mild response to pain or repeated stimuli. - Level III – Response to stimuli is more localized (following a command), but is inconsistent and often delayed. - Level IV – Heightened level of response, but patient is confused and agitated. - Level V – Responses are more alert, but patient is confused, non-purposeful, and usually inappropriate. Impaired memory. - Level VI – Behaviors and response are purposeful, but direction is required. Improved memory. - Level VII – Patient is performing daily tasks with little confusion, but actions seem “robot-like.” Problem solving, thinking, and judgment are still impaired. - Level VIII – Memory and basic skills are highly improved, however, patient may still need to be supervised because of impaired cognitive abilities.

ABI vs TBI: What's the Difference? | Brain Injury Law Center

Acquired vs. Traumatic Brain Injury: What’s the Difference Between ABI vs. TBI?

The first step in successfully recovering from a brain injury is accurately identifying it. The differences in treatment and patient outcome often depend on a clear understanding of what is affecting your brain and the best way to minimize damage and preserve your health.

Definitions: Acquired Brain Injury vs. Traumatic Brain Injury

Here are the general definitions for ABIs vs. TBIs:

Acquired Brain Injury (ABI) includes any brain damage not present at birth, caused by factors such as strokes, infections, or oxygen deprivation.
Traumatic Brain Injury (TBI) is caused by external trauma to the head, like a blow or jolt, leading to disruptions in brain function.

Some acquired brain injuries may result from traumatic brain injuries, such as a stroke that results after a blow to the head. A lawyer who handles your injury case may bring in medical experts to prove a cause-and-effect line between the initial injury and the full damages you’ve suffered. Likewise, other forms of negligence could cause or worsen your condition, such as medical malpractice or misdiagnosis of your injury.

The Difference Between ABI and TBI

The key difference between these two injuries is that TBIs are specifically from physical trauma, while ABIs encompass a wider range of potential causes.

Causes of ABIs may include internal forms of trauma such as strokes, infections, tumors, oxygen deprivation (hypoxia), and certain medical conditions like encephalitis or meningitis.
Causes of TBIs come from external forces, traumas to the head such as a blow, bump, or jolt from an accident such as a car crash or sport collision. This force disrupts normal brain function.

Traumatic brain injuries may be more quickly discovered because the inciting event — a vehicle crash or fall, for example — often leads to a medical evaluation. The onset of ABIs may be slower and more subtle due to their invisible, internal causes.

Diagnostic Failures: TBI vs. ABI

Diagnostic failures in the context of TBI vs. ABI may cause you additional harm due to medical malpractice. Here’s a breakdown of what it means for each:

TBIs can vary widely in severity, symptoms, and outcomes, making them challenging to diagnose accurately, especially in cases of mild TBI (concussions). Symptoms of a TBI may not appear immediately after the injury, leading to delayed diagnosis or misdiagnosis. Mild TBIs can have subtle or transient symptoms that may be overlooked or attributed to other causes, resulting in diagnostic errors.
ABIs have a wide range of invisible causes. The symptoms of ABIs can vary widely depending on the cause, location, and extent of brain damage, making it challenging to diagnose accurately without comprehensive assessments.

Overlapping symptoms could cause a critical failure in care. There is a danger that a TBI from a car or bike accident could mask the symptoms of an underlying ABI due to another cause, such as a tumor or stroke. Some symptoms of ABIs, such as cognitive impairments or behavioral changes, may overlap with symptoms of other neurological or psychiatric disorders, leading to diagnostic confusion.

Your medical team has a responsibility to conduct a thorough evaluation of your health if they suspect or have confirmation of a brain injury. A failure to accurately account for the difference between an ABI vs. a TBI could mean you have grounds to sue for negligence. Filing a lawsuit helps injured patients secure the funds necessary for proper treatment and recovery.

Types of Acquired Brain Injury

Closed – This type of brain injury frequently occurs as a result of the rapid movement of the brain inside the cranial cavity and is marked by the bruising and/or tearing of blood vessels and tissues. More specifically, a closed brain injury is one in which the injuries are completely internal and do not penetrate the skull bone. Falls, car accidents, or any incident involving excessive shaking often causes closed brain injuries.
Penetrating or Open – A penetrating brain injury, also called an open brain injury, is characterized by a break in the skull bone. Bullet wounds are a primary example of a penetrating brain injury.
Diffuse Axonal – Commonly referred to as DAI, this type of injury involves the tearing of nerve fibers caused by the shifting and rotating of the brain inside the skull. DAI often causes injury to multiple areas of the brain and coma.
Primary – This type of brain injury refers to one that is sudden but complete, meaning the injury is non-progressive. Examples of primary brain injuries include those sustained as a result of gunshot wounds, car accidents, and falls.
Secondary – Unlike primary brain injuries, secondary brain injuries are those that continue to evolve or progress after the injury is sustained. These continued changes – which can be cellular, chemical, tissue, and/or blood-related –contribute to further brain damage.

ABI Treatment and Rehabilitation Programs

The vast majority of those who suffer from ABI require some kind of medical treatment. ABI treatment and rehabilitation generally has two goals with regard to the patient: to maximize cognitive functioning and to improve overall quality of life. Treatment and rehabilitation for acquired brain injury victims depends on various factors including the type of injury and its severity as well as patient health and family/community support. ABI treatment and rehabilitation programs are individualized based on a thorough assessment of these factors, but may include any of the following:

Physical care – such as nutritional and medication needs
Pain management – medication and other methods for alleviating the pain associated with ABI
Psychological care – includes the administration of various tests to identify any behavioral and/or emotional problems as well as necessary counseling
Self-care skills – such as bathing, grooming, and feeding
Communication skills – speech therapy and alternative modes of communication
Mobility skills – may include wheelchair use or walking device
Socialization skills – focuses on interactions with family and community
Cognitive skills – to enhance memory, problem solving, concentration, and other areas of cognitive functioning affected by the injury
Vocational skills – work-related training
Family support – includes patient/family education and training on the numerous issues relevant to living with ABI

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Acquired Brain Injury Coma

In some severe cases of acquired brain injury (ABI), also referred to as traumatic brain injury (TBI), patients may lapse into a coma. A coma is an altered state of consciousness in which a patient is either completely unconscious and does not respond to any amount of stimulation or has a reduced consciousness and responds only to certain stimuli. The depth and time a patient is comatose depends on the location and seriousness of the acquired brain injury. While some patients wake up and fully recover from a coma, many will suffer significant life-long disabilities.

Measuring a Coma

In emergency and intensive care settings, the depth or severity of a coma is typically measured on the Glascow coma scale, which evaluates eye, verbal, and motor responses on a scale from three to 15. A lower score indicates a lower level of consciousness and awareness.

In ABI treatment and rehabilitation settings, a coma is measured on a different scale – called the Rancho scale – that is used to determine the patient’s response level and ability to function. This scale is based on the patient’s reaction to his/her environment and outside stimuli and measures this reaction according to the following eight levels:

Level I – Complete absence of any response to stimuli.
Level II – General, mild response to pain or repeated stimuli.
Level III – Response to stimuli is more localized (following a command), but is inconsistent and often delayed.
Level IV – Heightened level of response, but patient is confused and agitated.
Level V – Responses are more alert, but patient is confused, non-purposeful, and usually inappropriate. Impaired memory.
Level VI – Behaviors and response are purposeful, but direction is required. Improved memory.
Level VII – Patient is performing daily tasks with little confusion, but actions seem “robot-like.” Problem solving, thinking, and judgment are still impaired.
Level VIII – Memory and basic skills are highly improved, however, patient may still need to be supervised because of impaired cognitive abilities.

Causes and Consequences of Acquired Brain Injury

There are numerous causes of ABI—the most common being motor vehicle accidents. Approximately 28 percent of ABI cases occur as a result of motor vehicle accidents and usually lead to severe injury and even death. Another common cause of acquired brain injury is from firearms. Ninety percent of all ABI cases stemming from firearms are fatal. Slip and fall accidents are the leading cause of ABI in adults over 65 and physical abuse or violent shaking is the leading cause of brain injury in infants and young children. Other catastrophic incidents such as sporting accidents and medical malpractice can also cause severe damage to the brain.

The effects of an acquired brain injury can vary depending on the severity of the injury. In some cases, the symptoms are mild and go away with proper treatment. Mild symptoms include headache, confusion, dizziness, fatigue, blurred vision, change in sleep and behavioral patterns, and more.

Some more serious consequences of acquired brain injury include:

Cognitive Defects – Coma, amnesia, shortened attention span, problem solving and judgment deficits, loss of space and time perception
Motor Sensory Complications – Weakness, paralysis, poor balance and coordination, spasticity, reduced endurance, tremors, problems swallowing
Perceptual and Sensory Defects – Loss or change in sensations, tastes, hearing, touch, and smell, and vision problems
Language and Communication Problems – Difficulty speaking, writing, reading, or identifying objects
Functional Complications – Difficulty with daily activities such as bathing and dressing, organizational problems
Social and Psychiatric Changes – Problems understanding or interacting in social situations, irritability, decreased motivation, depression, anxiety
Traumatic Epilepsy – Two to five percent of ABI victims experience seizures
Death – Many cases of ABI result in death

The costs associated with treating an acquired brain injury can be substantial and vary on an individual basis. Some victims of ABI require long-term care and rehabilitation while others short-term or less intensive treatment.

If you or someone you love is suffering from ABI, you probably feel overwhelmed—emotionally, physically, and financially. We may be able to help. Please contact us today for a FREE case evaluation with a caring and competent personal injury lawyer who can help you understand your legal rights and options.

Contact Experienced Brain Injury Attorneys

At the Brain Injury Law Center, we understand the profound impact that acquired brain injuries (ABI) and traumatic brain injuries (TBI) can have on individuals and families. The injured party may be out of work, faced with a challenging uphill recovery, all while loved ones take on additional work to care for their needs. Our lawyers believe in compassionate advocacy and are dedicated to helping you navigate the legal complexities while providing support every step of the way.

Remember, you are not alone in this journey. Our team is here to listen, inform, and fight for your rights with empathy and proven experience. Our firm’s founder Stephen M. Smith has a unique background in neuroanatomical science, which contributes to our holistic understanding of brain injury cases, the effects on patients, and the needs of families for optimal recovery.

If you or a loved one has experienced a brain injury due to negligence or malpractice, don’t hesitate to reach out. Our team works on a contingency fee basis, meaning we only earn our fee if we win for you first. This relieves our clients of the financial burden of upfront costs during their most difficult times. Schedule a free consultation with us today by calling (757) 244-7000 to discuss your case and learn how we can help you secure the compensation and justice you deserve.

TBI vs ABI: Differences and Similarities