CBIS Certified Brain Injury Specialist
Exam Bank (2025/2026 Update) – Two
Versions of Verified Questions and
Answers
Overview: This complete exam bank for the Certified Brain Injury Specialist (CBIS) certification
includes 2 versions, each with 100 multiple-choice questions, as per the actual exam
structure set by the Academy of Certified Brain Injury Specialists (ACBIS). Questions cover five
main topic areas: Brain Injury Pathophysiology (20 questions), Rehabilitation Strategies
(30 questions), Patient Care Principles (30 questions), Neuropsychology and Behavioral
Management (10 questions), and Ethical/Legal Aspects (10 questions). Each question
includes four answer options (A–D), the correct answer marked, and a concise rationale. Each
question is worth 1 point (total 100 points per version). The content aligns with the 2025/2026
CBIS curriculum, emphasizing updated rehabilitation techniques, patient-centered care, and
legal considerations.
Version 1: CBIS Exam Version 1
Topic 1: Brain Injury Pathophysiology (Questions 1–20)
Question 1
What is the primary mechanism of traumatic brain injury (TBI) in closed-head injuries?
A. Focal impact damage
B. Diffuse axonal injury from acceleration/deceleration
C. Penetrating wound
D. Ischemic stroke
Correct Answer: B
Rationale: Closed-head TBI often results from shearing forces causing diffuse axonal injury
(DAI). Why correct: DAI is hallmark of closed-head trauma. Why others are incorrect: Focal
(A) is contusion; penetrating (C) is open injury; stroke (D) is vascular.
Question 2
Which phase of secondary brain injury involves excitotoxicity?
A. Immediate
,B. Early (minutes to hours)
C. Intermediate (hours to days)
D. Late (days to weeks)
Correct Answer: B
Rationale: Excitotoxicity from glutamate release occurs early post-injury. Why correct:
Neurotransmitter surge. Why others are incorrect: Immediate (A) is primary; intermediate (C)
is edema; late (D) is recovery.
Question 3
What is the Glasgow Coma Scale (GCS) score for severe TBI?
A. 3–8
B. 9–12
C. 13–15
D. 16–20
Correct Answer: A
Rationale: GCS 3–8 indicates severe TBI requiring intensive care. Why correct: Standard
severity metric. Why others are incorrect: 9–12 (B) is moderate; 13–15 (C) is mild; 16–20 (D)
is not valid.
Question 4
What is the primary cause of cerebral edema in acute TBI?
A. Blood-brain barrier disruption
B. Increased intracranial pressure
C. Vasogenic influx
D. All of the above
Correct Answer: D
Rationale: Edema results from barrier disruption, pressure increase, and fluid influx. Why
correct: Multifactorial process. Why others are incorrect: Each is a contributor, so D is
comprehensive.
Question 5
Which neurotransmitter drives excitotoxicity in TBI?
A. Glutamate
B. GABA
C. Dopamine
D. Serotonin
Correct Answer: A
Rationale: Excess glutamate overstimulates neurons, causing cell death. Why correct:
Excitotoxic mechanism. Why others are incorrect: GABA (B) is inhibitory; dopamine (C) and
serotonin (D) are modulatory.
Question 6
,What does the Monro-Kellie doctrine describe?
A. Fixed intracranial volume
B. Cerebral blood flow regulation
C. CSF production rate
D. Neuronal regeneration
Correct Answer: A
Rationale: The doctrine states that skull volume is fixed, so increases in one component (blood,
CSF, brain) displace others. Why correct: ICP principle. Why others are incorrect: Flow (B),
CSF (C), and regeneration (D) are separate.
Question 7
What causes energy failure in hypoxic brain injury?
A. ATP depletion
B. Glucose overload
C. Oxygen surplus
D. Protein synthesis failure
Correct Answer: A
Rationale: Hypoxia impairs ATP production via oxidative phosphorylation. Why correct:
Metabolic crisis. Why others are incorrect: Glucose (B) and oxygen (C) are depleted; protein
(D) is secondary.
Question 8
Which hemorrhage is associated with a "thunderclap headache"?
A. Subarachnoid hemorrhage
B. Epidural hematoma
C. Subdural hematoma
D. Intracerebral hemorrhage
Correct Answer: A
Rationale: Subarachnoid hemorrhage (SAH) from aneurysm rupture causes sudden, severe
headache. Why correct: Classic symptom. Why others are incorrect: Epidural (B) has lucid
interval; subdural (C) is gradual; intracerebral (D) is focal.
Question 9
What role do astrocytes play post-TBI?
A. Form glial scar and release cytokines
B. Produce neurotransmitters
C. Conduct action potentials
D. Regulate blood flow only
Correct Answer: A
Rationale: Astrocytes contribute to scarring and inflammation. Why correct: Reactive gliosis.
Why others are incorrect: Neurotransmitters (B) are neuronal; potentials (C) are axons; blood
flow (D) is partial.
, Question 10
What is the Cushing reflex in TBI?
A. Hypertension and bradycardia from increased ICP
B. Hypotension and tachycardia
C. Hypertension and tachycardia
D. Bradycardia and tachypnea
Correct Answer: A
Rationale: Cushing reflex (hypertension, bradycardia, irregular breathing) signals high ICP. Why
correct: Herniation warning. Why others are incorrect: B, C, D are mismatched responses.
Question 11
What causes diffuse axonal injury (DAI)?
A. Rotational acceleration forces
B. Direct skull fracture
C. Arterial occlusion
D. Meningeal infection
Correct Answer: A
Rationale: DAI results from shearing at gray-white matter interfaces. Why correct:
Biomechanical force. Why others are incorrect: Fracture (B) is focal; occlusion (C) is stroke;
infection (D) is meningitis.
Question 12
Which biomarker is elevated in acute TBI?
A. S100B
B. C-reactive protein (CRP)
C. Troponin
D. B-type natriuretic peptide (BNP)
Correct Answer: A
Rationale: S100B reflects glial damage in TBI. Why correct: Brain-specific marker. Why others
are incorrect: CRP (B) is general inflammation; troponin (C) is cardiac; BNP (D) is heart failure.
Question 13
How does blood-brain barrier disruption affect TBI?
A. Causes vasogenic edema
B. Enhances drug delivery
C. Blocks oxygen transport
D. Filters neurotransmitters
Correct Answer: A
Rationale: Disruption allows fluid leakage, causing edema. Why correct: Secondary injury. Why
others are incorrect: Delivery (B) is therapeutic; oxygen (C) is false; neurotransmitters (D) are
synaptic.
Exam Bank (2025/2026 Update) – Two
Versions of Verified Questions and
Answers
Overview: This complete exam bank for the Certified Brain Injury Specialist (CBIS) certification
includes 2 versions, each with 100 multiple-choice questions, as per the actual exam
structure set by the Academy of Certified Brain Injury Specialists (ACBIS). Questions cover five
main topic areas: Brain Injury Pathophysiology (20 questions), Rehabilitation Strategies
(30 questions), Patient Care Principles (30 questions), Neuropsychology and Behavioral
Management (10 questions), and Ethical/Legal Aspects (10 questions). Each question
includes four answer options (A–D), the correct answer marked, and a concise rationale. Each
question is worth 1 point (total 100 points per version). The content aligns with the 2025/2026
CBIS curriculum, emphasizing updated rehabilitation techniques, patient-centered care, and
legal considerations.
Version 1: CBIS Exam Version 1
Topic 1: Brain Injury Pathophysiology (Questions 1–20)
Question 1
What is the primary mechanism of traumatic brain injury (TBI) in closed-head injuries?
A. Focal impact damage
B. Diffuse axonal injury from acceleration/deceleration
C. Penetrating wound
D. Ischemic stroke
Correct Answer: B
Rationale: Closed-head TBI often results from shearing forces causing diffuse axonal injury
(DAI). Why correct: DAI is hallmark of closed-head trauma. Why others are incorrect: Focal
(A) is contusion; penetrating (C) is open injury; stroke (D) is vascular.
Question 2
Which phase of secondary brain injury involves excitotoxicity?
A. Immediate
,B. Early (minutes to hours)
C. Intermediate (hours to days)
D. Late (days to weeks)
Correct Answer: B
Rationale: Excitotoxicity from glutamate release occurs early post-injury. Why correct:
Neurotransmitter surge. Why others are incorrect: Immediate (A) is primary; intermediate (C)
is edema; late (D) is recovery.
Question 3
What is the Glasgow Coma Scale (GCS) score for severe TBI?
A. 3–8
B. 9–12
C. 13–15
D. 16–20
Correct Answer: A
Rationale: GCS 3–8 indicates severe TBI requiring intensive care. Why correct: Standard
severity metric. Why others are incorrect: 9–12 (B) is moderate; 13–15 (C) is mild; 16–20 (D)
is not valid.
Question 4
What is the primary cause of cerebral edema in acute TBI?
A. Blood-brain barrier disruption
B. Increased intracranial pressure
C. Vasogenic influx
D. All of the above
Correct Answer: D
Rationale: Edema results from barrier disruption, pressure increase, and fluid influx. Why
correct: Multifactorial process. Why others are incorrect: Each is a contributor, so D is
comprehensive.
Question 5
Which neurotransmitter drives excitotoxicity in TBI?
A. Glutamate
B. GABA
C. Dopamine
D. Serotonin
Correct Answer: A
Rationale: Excess glutamate overstimulates neurons, causing cell death. Why correct:
Excitotoxic mechanism. Why others are incorrect: GABA (B) is inhibitory; dopamine (C) and
serotonin (D) are modulatory.
Question 6
,What does the Monro-Kellie doctrine describe?
A. Fixed intracranial volume
B. Cerebral blood flow regulation
C. CSF production rate
D. Neuronal regeneration
Correct Answer: A
Rationale: The doctrine states that skull volume is fixed, so increases in one component (blood,
CSF, brain) displace others. Why correct: ICP principle. Why others are incorrect: Flow (B),
CSF (C), and regeneration (D) are separate.
Question 7
What causes energy failure in hypoxic brain injury?
A. ATP depletion
B. Glucose overload
C. Oxygen surplus
D. Protein synthesis failure
Correct Answer: A
Rationale: Hypoxia impairs ATP production via oxidative phosphorylation. Why correct:
Metabolic crisis. Why others are incorrect: Glucose (B) and oxygen (C) are depleted; protein
(D) is secondary.
Question 8
Which hemorrhage is associated with a "thunderclap headache"?
A. Subarachnoid hemorrhage
B. Epidural hematoma
C. Subdural hematoma
D. Intracerebral hemorrhage
Correct Answer: A
Rationale: Subarachnoid hemorrhage (SAH) from aneurysm rupture causes sudden, severe
headache. Why correct: Classic symptom. Why others are incorrect: Epidural (B) has lucid
interval; subdural (C) is gradual; intracerebral (D) is focal.
Question 9
What role do astrocytes play post-TBI?
A. Form glial scar and release cytokines
B. Produce neurotransmitters
C. Conduct action potentials
D. Regulate blood flow only
Correct Answer: A
Rationale: Astrocytes contribute to scarring and inflammation. Why correct: Reactive gliosis.
Why others are incorrect: Neurotransmitters (B) are neuronal; potentials (C) are axons; blood
flow (D) is partial.
, Question 10
What is the Cushing reflex in TBI?
A. Hypertension and bradycardia from increased ICP
B. Hypotension and tachycardia
C. Hypertension and tachycardia
D. Bradycardia and tachypnea
Correct Answer: A
Rationale: Cushing reflex (hypertension, bradycardia, irregular breathing) signals high ICP. Why
correct: Herniation warning. Why others are incorrect: B, C, D are mismatched responses.
Question 11
What causes diffuse axonal injury (DAI)?
A. Rotational acceleration forces
B. Direct skull fracture
C. Arterial occlusion
D. Meningeal infection
Correct Answer: A
Rationale: DAI results from shearing at gray-white matter interfaces. Why correct:
Biomechanical force. Why others are incorrect: Fracture (B) is focal; occlusion (C) is stroke;
infection (D) is meningitis.
Question 12
Which biomarker is elevated in acute TBI?
A. S100B
B. C-reactive protein (CRP)
C. Troponin
D. B-type natriuretic peptide (BNP)
Correct Answer: A
Rationale: S100B reflects glial damage in TBI. Why correct: Brain-specific marker. Why others
are incorrect: CRP (B) is general inflammation; troponin (C) is cardiac; BNP (D) is heart failure.
Question 13
How does blood-brain barrier disruption affect TBI?
A. Causes vasogenic edema
B. Enhances drug delivery
C. Blocks oxygen transport
D. Filters neurotransmitters
Correct Answer: A
Rationale: Disruption allows fluid leakage, causing edema. Why correct: Secondary injury. Why
others are incorrect: Delivery (B) is therapeutic; oxygen (C) is false; neurotransmitters (D) are
synaptic.
