Certified Brain Injury Specialist (CBIS) Exam
2026/2027 | Brain Injury Association of America
Certification Study Guide, CBIS Practice Questions
& Answers, Brain Injury Specialist Exam Prep,
Traumatic Brain Injury (TBI), Acquired Brain
Injury (ABI), Neuroanatomy, Cognitive &
Behavioral Impairments, Assessment,
Rehabilitation, Recovery, Community Reintegration,
Ethics & Detailed Rationales
Question 1: Which of the following best defines an acquired brain injury
(ABI)?
A. An injury to the brain that occurs only during the perinatal period
B. An injury to the brain that is congenital or hereditary in origin
C. An injury to the brain that is not hereditary, congenital, degenerative, or
induced by birth trauma
D. An injury to the brain caused exclusively by external physical force
CORRECT ANSWER: C. An injury to the brain that is not hereditary,
congenital, degenerative, or induced by birth trauma
Rationale: Acquired brain injury (ABI) is the overarching term that
encompasses any injury to the brain occurring after birth that is not
hereditary, congenital, degenerative, or induced by birth trauma. This
definition is critical because it distinguishes ABI from conditions such as
genetic disorders or neurodegenerative diseases, and it includes both
traumatic and non-traumatic causes (e.g., stroke, anoxia, infection) .
Question 2: A traumatic brain injury (TBI) is distinguished from other
acquired brain injuries primarily by which factor?
A. The presence of an external physical force applied to the head
B. The age of the individual at the time of injury
C. The location of the injury within the brain
D. The duration of loss of consciousness
CORRECT ANSWER: A. The presence of an external physical force
applied to the head
Rationale: TBI is a subset of ABI specifically caused by an external physical
force impacting the head or body, resulting in brain dysfunction. Non-
traumatic ABIs (e.g., stroke, hypoxia) lack this external mechanical
,mechanism. This distinction is foundational for classification, prognosis,
and rehabilitation planning .
Question 3: According to the Glasgow Coma Scale (GCS), a score of 13–
15 is typically classified as which severity of TBI?
A. Severe
B. Moderate
C. Mild
D. Profound
CORRECT ANSWER: C. Mild
Rationale: The GCS is the most widely used tool for classifying TBI severity
based on eye, verbal, and motor responses. Scores of 13–15 indicate mild
TBI (often called concussion), 9–12 indicate moderate TBI, and 3–8 indicate
severe TBI. This classification guides acute management and predicts
recovery trajectories .
Question 4: Which of the following is a hallmark characteristic of
moderate to severe TBI on neuroimaging?
A. Normal findings on all imaging modalities
B. Diffuse axonal injury visible on diffusion tensor imaging (DTI)
C. Exclusive presence of epidural hematoma
D. Absence of any intracranial pathology
CORRECT ANSWER: B. Diffuse axonal injury visible on diffusion tensor
imaging (DTI)
Rationale: Diffuse axonal injury (DAI) results from shearing forces during
rapid acceleration-deceleration and is a hallmark of moderate to severe
TBI. While DAI may appear normal on standard CT, advanced imaging such
as DTI can reveal white matter tract disruption. This finding correlates with
prolonged unconsciousness and poor functional outcomes .
Question 5: The reticular activating system (RAS) is critical in brain
injury because it regulates which function?
A. Fine motor coordination
B. Arousal and consciousness
C. Language comprehension
D. Visual acuity
,CORRECT ANSWER: B. Arousal and consciousness
Rationale: The RAS, located in the brainstem, is essential for maintaining
arousal, wakefulness, and consciousness. Damage to this system—
common in severe TBI—can result in coma, vegetative state, or disorders of
consciousness. Understanding RAS function is foundational for assessing
and managing patients with impaired consciousness .
Question 6: Neuroplasticity after brain injury is best described as:
A. The brain's inability to reorganize after damage
B. The brain's capacity to form new neural connections and reorganize
function
C. A static process that ceases after childhood
D. A phenomenon exclusive to neurodegenerative diseases
CORRECT ANSWER: B. The brain's capacity to form new neural
connections and reorganize function
Rationale: Neuroplasticity is the brain's ability to reorganize itself by
forming new neural connections throughout life. After injury, plasticity
underpins spontaneous recovery and is the biological basis for
rehabilitation interventions. Experience-dependent learning and targeted
therapy can harness plasticity to promote functional gains .
Question 7: Which of the following best describes experience-
dependent learning in the context of brain injury rehabilitation?
A. Learning that occurs automatically without practice
B. Learning that is driven by specific, repeated experiences and practice
C. Learning that is entirely genetic and predetermined
D. Learning that cannot be influenced by therapy
CORRECT ANSWER: B. Learning that is driven by specific, repeated
experiences and practice
Rationale: Experience-dependent learning refers to neural changes that
occur in response to specific experiences, practice, and environmental
input. In rehabilitation, this principle supports the use of repetitive, task-
specific training to drive functional reorganization and recovery. It contrasts
with experience-expectant learning, which occurs during critical
developmental periods .
, Question 8: Autonomic storming (paroxysmal sympathetic
hyperactivity) after severe TBI is characterized by:
A. Bradycardia and hypotension
B. Episodes of tachycardia, hypertension, diaphoresis, and posturing
C. Persistent hypothermia and bradypnea
D. Complete loss of cranial nerve function
CORRECT ANSWER: B. Episodes of tachycardia, hypertension,
diaphoresis, and posturing
Rationale: Autonomic storming, also called paroxysmal sympathetic
hyperactivity, manifests as episodic surges of sympathetic activity:
tachycardia, hypertension, tachypnea, diaphoresis, hyperthermia, and
abnormal posturing. It reflects dysregulation of autonomic pathways after
severe TBI and requires careful medical management to prevent secondary
injury .
Question 9: Which medical complication after TBI involves the
formation of heterotopic ossification?
A. Abnormal bone growth in soft tissues, often near joints
B. Loss of bone density throughout the skeleton
C. Infection of the bone marrow
D. Fracture of long bones due to trauma
CORRECT ANSWER: A. Abnormal bone growth in soft tissues, often
near joints
Rationale: Heterotopic ossification (HO) is the formation of mature
lamellar bone in soft tissues, commonly around the hips, knees, and
elbows after TBI. It can cause pain, restricted range of motion, and
functional impairment. Risk factors include prolonged immobility,
spasticity, and coma. Early recognition and management are essential .
Question 10: Deep vein thrombosis (DVT) is a significant concern after
TBI primarily because:
A. It occurs only in patients with spinal cord injury
B. Immobility and hypercoagulability increase clot risk, which can lead to
pulmonary embolism
C. It is a direct result of cranial nerve damage
D. It resolves spontaneously without intervention
2026/2027 | Brain Injury Association of America
Certification Study Guide, CBIS Practice Questions
& Answers, Brain Injury Specialist Exam Prep,
Traumatic Brain Injury (TBI), Acquired Brain
Injury (ABI), Neuroanatomy, Cognitive &
Behavioral Impairments, Assessment,
Rehabilitation, Recovery, Community Reintegration,
Ethics & Detailed Rationales
Question 1: Which of the following best defines an acquired brain injury
(ABI)?
A. An injury to the brain that occurs only during the perinatal period
B. An injury to the brain that is congenital or hereditary in origin
C. An injury to the brain that is not hereditary, congenital, degenerative, or
induced by birth trauma
D. An injury to the brain caused exclusively by external physical force
CORRECT ANSWER: C. An injury to the brain that is not hereditary,
congenital, degenerative, or induced by birth trauma
Rationale: Acquired brain injury (ABI) is the overarching term that
encompasses any injury to the brain occurring after birth that is not
hereditary, congenital, degenerative, or induced by birth trauma. This
definition is critical because it distinguishes ABI from conditions such as
genetic disorders or neurodegenerative diseases, and it includes both
traumatic and non-traumatic causes (e.g., stroke, anoxia, infection) .
Question 2: A traumatic brain injury (TBI) is distinguished from other
acquired brain injuries primarily by which factor?
A. The presence of an external physical force applied to the head
B. The age of the individual at the time of injury
C. The location of the injury within the brain
D. The duration of loss of consciousness
CORRECT ANSWER: A. The presence of an external physical force
applied to the head
Rationale: TBI is a subset of ABI specifically caused by an external physical
force impacting the head or body, resulting in brain dysfunction. Non-
traumatic ABIs (e.g., stroke, hypoxia) lack this external mechanical
,mechanism. This distinction is foundational for classification, prognosis,
and rehabilitation planning .
Question 3: According to the Glasgow Coma Scale (GCS), a score of 13–
15 is typically classified as which severity of TBI?
A. Severe
B. Moderate
C. Mild
D. Profound
CORRECT ANSWER: C. Mild
Rationale: The GCS is the most widely used tool for classifying TBI severity
based on eye, verbal, and motor responses. Scores of 13–15 indicate mild
TBI (often called concussion), 9–12 indicate moderate TBI, and 3–8 indicate
severe TBI. This classification guides acute management and predicts
recovery trajectories .
Question 4: Which of the following is a hallmark characteristic of
moderate to severe TBI on neuroimaging?
A. Normal findings on all imaging modalities
B. Diffuse axonal injury visible on diffusion tensor imaging (DTI)
C. Exclusive presence of epidural hematoma
D. Absence of any intracranial pathology
CORRECT ANSWER: B. Diffuse axonal injury visible on diffusion tensor
imaging (DTI)
Rationale: Diffuse axonal injury (DAI) results from shearing forces during
rapid acceleration-deceleration and is a hallmark of moderate to severe
TBI. While DAI may appear normal on standard CT, advanced imaging such
as DTI can reveal white matter tract disruption. This finding correlates with
prolonged unconsciousness and poor functional outcomes .
Question 5: The reticular activating system (RAS) is critical in brain
injury because it regulates which function?
A. Fine motor coordination
B. Arousal and consciousness
C. Language comprehension
D. Visual acuity
,CORRECT ANSWER: B. Arousal and consciousness
Rationale: The RAS, located in the brainstem, is essential for maintaining
arousal, wakefulness, and consciousness. Damage to this system—
common in severe TBI—can result in coma, vegetative state, or disorders of
consciousness. Understanding RAS function is foundational for assessing
and managing patients with impaired consciousness .
Question 6: Neuroplasticity after brain injury is best described as:
A. The brain's inability to reorganize after damage
B. The brain's capacity to form new neural connections and reorganize
function
C. A static process that ceases after childhood
D. A phenomenon exclusive to neurodegenerative diseases
CORRECT ANSWER: B. The brain's capacity to form new neural
connections and reorganize function
Rationale: Neuroplasticity is the brain's ability to reorganize itself by
forming new neural connections throughout life. After injury, plasticity
underpins spontaneous recovery and is the biological basis for
rehabilitation interventions. Experience-dependent learning and targeted
therapy can harness plasticity to promote functional gains .
Question 7: Which of the following best describes experience-
dependent learning in the context of brain injury rehabilitation?
A. Learning that occurs automatically without practice
B. Learning that is driven by specific, repeated experiences and practice
C. Learning that is entirely genetic and predetermined
D. Learning that cannot be influenced by therapy
CORRECT ANSWER: B. Learning that is driven by specific, repeated
experiences and practice
Rationale: Experience-dependent learning refers to neural changes that
occur in response to specific experiences, practice, and environmental
input. In rehabilitation, this principle supports the use of repetitive, task-
specific training to drive functional reorganization and recovery. It contrasts
with experience-expectant learning, which occurs during critical
developmental periods .
, Question 8: Autonomic storming (paroxysmal sympathetic
hyperactivity) after severe TBI is characterized by:
A. Bradycardia and hypotension
B. Episodes of tachycardia, hypertension, diaphoresis, and posturing
C. Persistent hypothermia and bradypnea
D. Complete loss of cranial nerve function
CORRECT ANSWER: B. Episodes of tachycardia, hypertension,
diaphoresis, and posturing
Rationale: Autonomic storming, also called paroxysmal sympathetic
hyperactivity, manifests as episodic surges of sympathetic activity:
tachycardia, hypertension, tachypnea, diaphoresis, hyperthermia, and
abnormal posturing. It reflects dysregulation of autonomic pathways after
severe TBI and requires careful medical management to prevent secondary
injury .
Question 9: Which medical complication after TBI involves the
formation of heterotopic ossification?
A. Abnormal bone growth in soft tissues, often near joints
B. Loss of bone density throughout the skeleton
C. Infection of the bone marrow
D. Fracture of long bones due to trauma
CORRECT ANSWER: A. Abnormal bone growth in soft tissues, often
near joints
Rationale: Heterotopic ossification (HO) is the formation of mature
lamellar bone in soft tissues, commonly around the hips, knees, and
elbows after TBI. It can cause pain, restricted range of motion, and
functional impairment. Risk factors include prolonged immobility,
spasticity, and coma. Early recognition and management are essential .
Question 10: Deep vein thrombosis (DVT) is a significant concern after
TBI primarily because:
A. It occurs only in patients with spinal cord injury
B. Immobility and hypercoagulability increase clot risk, which can lead to
pulmonary embolism
C. It is a direct result of cranial nerve damage
D. It resolves spontaneously without intervention
