Certified Brain Injury Specialist (CBIS) Exam
2026/2027 | ACBIS Certification Study Guide,
BIAA Certified Brain Injury Specialist Exam
Prep, Practice Questions & Answers, TBI, ABI,
Neuroanatomy, Neuroimaging, Cognition,
Communication, Behavioral Changes,
Assessment, Rehabilitation, Recovery &
Detailed Rationales
Question 1: Which of the following best defines an acquired brain injury
(ABI)?
A. An injury resulting from birth trauma or congenital defect
B. An injury occurring after birth that is not hereditary, congenital, or
degenerative
C. An injury exclusively caused by external physical force
D. A progressive neurodegenerative disorder with unknown etiology
CORRECT ANSWER: B. An injury occurring after birth that is not
hereditary, congenital, or degenerative
Rationale: An acquired brain injury encompasses any injury to the brain
that occurs after birth and is not related to hereditary, congenital, or
degenerative conditions. This definition includes both traumatic brain
injuries (caused by external force) and non-traumatic injuries such as
strokes, anoxia, and infections.
Question 2: A patient with a Glasgow Coma Scale score of 10 is
classified as having which severity of traumatic brain injury?
A. Mild TBI
B. Moderate TBI
C. Severe TBI
D. Persistent vegetative state
CORRECT ANSWER: B. Moderate TBI
Rationale: The Glasgow Coma Scale (GCS) classification for TBI severity is:
mild = 13-15, moderate = 9-12, and severe = 3-8. A GCS of 10 falls within
the moderate TBI range.
,Question 3: Which lobe of the brain is primarily responsible for
executive functions such as planning, organization, and behavioral
inhibition?
A. Parietal lobe
B. Occipital lobe
C. Frontal lobe
D. Temporal lobe
CORRECT ANSWER: C. Frontal lobe
Rationale: The frontal lobe mediates executive functions including
planning, organization, problem-solving, and behavioral inhibition. Damage
to this region commonly produces personality changes, disinhibition, and
impaired judgment.
Question 4: What is the leading cause of traumatic brain injury across
all age groups?
A. Motor vehicle accidents
B. Falls
C. Assaults
D. Sports-related injuries
CORRECT ANSWER: B. Falls
Rationale: Falls are the leading cause of TBI, particularly among young
children and older adults. Motor vehicle accidents represent the second
leading cause of traumatic brain injury.
Question 5: Which structure serves as the primary relay station for
sensory information (except smell) traveling to the cerebral cortex?
A. Hypothalamus
B. Thalamus
C. Pons
D. Amygdala
CORRECT ANSWER: B. Thalamus
Rationale: The thalamus functions as the brain's primary sensory relay
station, receiving all sensory information (except olfactory) and
transmitting it to the appropriate cortical regions for processing.
,Question 6: Which part of the brain is critical for consolidating short-
term memory into long-term memory?
A. Amygdala
B. Cerebellum
C. Hippocampus
D. Corpus callosum
CORRECT ANSWER: C. Hippocampus
Rationale: The hippocampus, located in the medial temporal lobe, is
essential for memory consolidation—the process by which short-term
memories are converted into long-term memories. Damage produces
anterograde amnesia.
Question 7: Which cranial nerve controls pupil constriction and
accommodation?
A. Cranial Nerve II (Optic)
B. Cranial Nerve III (Oculomotor)
C. Cranial Nerve V (Trigeminal)
D. Cranial Nerve VII (Facial)
CORRECT ANSWER: B. Cranial Nerve III (Oculomotor)
Rationale: The oculomotor nerve (CN III) contains parasympathetic fibers
responsible for pupil constriction and lens accommodation. Damage can
result in a fixed, dilated pupil.
Question 8: What term describes the biochemical cascade of cellular
damage that occurs after the initial traumatic impact?
A. Primary injury
B. Secondary injury
C. Tertiary injury
D. Quaternary injury
CORRECT ANSWER: B. Secondary injury
Rationale: Secondary injury refers to the delayed biochemical and
physiological cascade—including excitotoxicity, oxidative stress,
inflammation, and apoptosis—that evolves over hours to days following the
primary mechanical injury.
, Question 9: Which of the following is an example of a non-traumatic
acquired brain injury?
A. Concussion from a fall
B. Penetrating head wound
C. Stroke
D. Diffuse axonal injury from motor vehicle accident
CORRECT ANSWER: C. Stroke
Rationale: Stroke is a non-traumatic acquired brain injury caused by
interruption of cerebral blood flow (ischemic or hemorrhagic). The other
options are all traumatic brain injuries resulting from external physical
forces.
Question 10: What is the primary function of the reticular activating
system (RAS)?
A. Coordination of voluntary movement
B. Regulation of arousal and consciousness
C. Processing of visual information
D. Storage of long-term memories
CORRECT ANSWER: B. Regulation of arousal and consciousness
Rationale: The reticular activating system, located in the brainstem,
regulates wakefulness, arousal, and the sleep-wake cycle. Damage to this
system can result in coma or persistent vegetative state.
Question 11: A patient exhibits bitemporal hemianopsia following a
traumatic brain injury. Where is the lesion most likely located?
A. Optic chiasm
B. Left occipital lobe
C. Right optic nerve
D. Frontal eye fields
CORRECT ANSWER: A. Optic chiasm
Rationale: The optic chiasm is the site where nasal retinal fibers cross.
Compression or injury at this location produces bitemporal hemianopsia—
loss of the temporal visual fields in both eyes.
2026/2027 | ACBIS Certification Study Guide,
BIAA Certified Brain Injury Specialist Exam
Prep, Practice Questions & Answers, TBI, ABI,
Neuroanatomy, Neuroimaging, Cognition,
Communication, Behavioral Changes,
Assessment, Rehabilitation, Recovery &
Detailed Rationales
Question 1: Which of the following best defines an acquired brain injury
(ABI)?
A. An injury resulting from birth trauma or congenital defect
B. An injury occurring after birth that is not hereditary, congenital, or
degenerative
C. An injury exclusively caused by external physical force
D. A progressive neurodegenerative disorder with unknown etiology
CORRECT ANSWER: B. An injury occurring after birth that is not
hereditary, congenital, or degenerative
Rationale: An acquired brain injury encompasses any injury to the brain
that occurs after birth and is not related to hereditary, congenital, or
degenerative conditions. This definition includes both traumatic brain
injuries (caused by external force) and non-traumatic injuries such as
strokes, anoxia, and infections.
Question 2: A patient with a Glasgow Coma Scale score of 10 is
classified as having which severity of traumatic brain injury?
A. Mild TBI
B. Moderate TBI
C. Severe TBI
D. Persistent vegetative state
CORRECT ANSWER: B. Moderate TBI
Rationale: The Glasgow Coma Scale (GCS) classification for TBI severity is:
mild = 13-15, moderate = 9-12, and severe = 3-8. A GCS of 10 falls within
the moderate TBI range.
,Question 3: Which lobe of the brain is primarily responsible for
executive functions such as planning, organization, and behavioral
inhibition?
A. Parietal lobe
B. Occipital lobe
C. Frontal lobe
D. Temporal lobe
CORRECT ANSWER: C. Frontal lobe
Rationale: The frontal lobe mediates executive functions including
planning, organization, problem-solving, and behavioral inhibition. Damage
to this region commonly produces personality changes, disinhibition, and
impaired judgment.
Question 4: What is the leading cause of traumatic brain injury across
all age groups?
A. Motor vehicle accidents
B. Falls
C. Assaults
D. Sports-related injuries
CORRECT ANSWER: B. Falls
Rationale: Falls are the leading cause of TBI, particularly among young
children and older adults. Motor vehicle accidents represent the second
leading cause of traumatic brain injury.
Question 5: Which structure serves as the primary relay station for
sensory information (except smell) traveling to the cerebral cortex?
A. Hypothalamus
B. Thalamus
C. Pons
D. Amygdala
CORRECT ANSWER: B. Thalamus
Rationale: The thalamus functions as the brain's primary sensory relay
station, receiving all sensory information (except olfactory) and
transmitting it to the appropriate cortical regions for processing.
,Question 6: Which part of the brain is critical for consolidating short-
term memory into long-term memory?
A. Amygdala
B. Cerebellum
C. Hippocampus
D. Corpus callosum
CORRECT ANSWER: C. Hippocampus
Rationale: The hippocampus, located in the medial temporal lobe, is
essential for memory consolidation—the process by which short-term
memories are converted into long-term memories. Damage produces
anterograde amnesia.
Question 7: Which cranial nerve controls pupil constriction and
accommodation?
A. Cranial Nerve II (Optic)
B. Cranial Nerve III (Oculomotor)
C. Cranial Nerve V (Trigeminal)
D. Cranial Nerve VII (Facial)
CORRECT ANSWER: B. Cranial Nerve III (Oculomotor)
Rationale: The oculomotor nerve (CN III) contains parasympathetic fibers
responsible for pupil constriction and lens accommodation. Damage can
result in a fixed, dilated pupil.
Question 8: What term describes the biochemical cascade of cellular
damage that occurs after the initial traumatic impact?
A. Primary injury
B. Secondary injury
C. Tertiary injury
D. Quaternary injury
CORRECT ANSWER: B. Secondary injury
Rationale: Secondary injury refers to the delayed biochemical and
physiological cascade—including excitotoxicity, oxidative stress,
inflammation, and apoptosis—that evolves over hours to days following the
primary mechanical injury.
, Question 9: Which of the following is an example of a non-traumatic
acquired brain injury?
A. Concussion from a fall
B. Penetrating head wound
C. Stroke
D. Diffuse axonal injury from motor vehicle accident
CORRECT ANSWER: C. Stroke
Rationale: Stroke is a non-traumatic acquired brain injury caused by
interruption of cerebral blood flow (ischemic or hemorrhagic). The other
options are all traumatic brain injuries resulting from external physical
forces.
Question 10: What is the primary function of the reticular activating
system (RAS)?
A. Coordination of voluntary movement
B. Regulation of arousal and consciousness
C. Processing of visual information
D. Storage of long-term memories
CORRECT ANSWER: B. Regulation of arousal and consciousness
Rationale: The reticular activating system, located in the brainstem,
regulates wakefulness, arousal, and the sleep-wake cycle. Damage to this
system can result in coma or persistent vegetative state.
Question 11: A patient exhibits bitemporal hemianopsia following a
traumatic brain injury. Where is the lesion most likely located?
A. Optic chiasm
B. Left occipital lobe
C. Right optic nerve
D. Frontal eye fields
CORRECT ANSWER: A. Optic chiasm
Rationale: The optic chiasm is the site where nasal retinal fibers cross.
Compression or injury at this location produces bitemporal hemianopsia—
loss of the temporal visual fields in both eyes.
