CBIS Certified Brain Injury Specialist Exam
2026/2027 | ACBIS Certification Study Guide,
Brain Injury Association of America CBIS Exam
Prep, Practice Questions & Answers, TBI, ABI,
Neuroanatomy, Neuroimaging, Brain Injury
Assessment, Cognition, Communication, Behavioral
Changes, Rehabilitation, Recovery & Detailed
Rationales
Question 1: Which of the following best defines an Acquired Brain
Injury (ABI) according to the ACBIS study outline?
A. An injury to the brain that is hereditary, congenital, or degenerative in
nature
B. An injury to the brain that occurs after birth and is not hereditary,
congenital, degenerative, or induced by birth trauma
C. An injury to the brain caused exclusively by external physical force
D. An injury to the brain that occurs only during childhood developmental
stages
CORRECT ANSWER: B. An injury to the brain that occurs after birth and
is not hereditary, congenital, degenerative, or induced by birth trauma
Rationale: The ACBIS Examination Study Outline explicitly defines acquired
brain injury (ABI) as an injury to the brain that occurs after birth and is not
hereditary, congenital, degenerative, or induced by birth trauma. This
definition encompasses both traumatic brain injury (TBI) and non-
traumatic causes such as stroke, anoxia, and infection. Option A describes
conditions that are explicitly excluded from the ABI definition. Option C is
incorrect because ABI includes non-traumatic causes. Option D is
incorrect because ABI can occur at any age after birth.
Question 2: A patient with a Glasgow Coma Scale (GCS) 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 is the most widely used tool for
classifying TBI severity. According to standard classification: GCS 13–15
indicates mild TBI, GCS 9–12 indicates moderate TBI, and GCS 3–8
indicates severe TBI. A score of 10 falls within the moderate range. Option A
is incorrect because mild TBI requires a GCS of 13 or higher. Option C is
incorrect because severe TBI requires a GCS of 8 or lower. Option D is
incorrect because persistent vegetative state is a disorder of
consciousness, not a TBI severity classification.
Question 3: Which of the following 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 traumatic brain injury, particularly
among young children and older adults. Motor vehicle accidents are the
second leading cause. While assaults and sports-related injuries
contribute to TBI incidence, they are not the primary cause across all age
groups. The CDC and Brain Injury Association of America consistently
report falls as the most common mechanism of TBI.
Question 4: According to the medical model of disability, who is
considered the "power person" in the therapeutic relationship?
A. The patient
B. The family guardian
C. The physician or therapist
D. The insurance case manager
CORRECT ANSWER: C. The physician or therapist
Rationale: In the medical model, the physician or therapist holds the
authority and decision-making power. The patient is expected to cooperate
with the treatment team and adapt to the therapy schedule. This contrasts
with the interdependence paradigm, where the person with a disability is
considered the "power person." Options A, B, and D do not align with the
medical model's hierarchical structure.
,Question 5: Which brain structure serves as the primary relay station
for sensory information (except smell) traveling to the cerebral cortex?
A. Hypothalamus
B. Thalamus
C. Pons
D. Reticular formation
CORRECT ANSWER: B. Thalamus
Rationale: The thalamus is the brain's primary relay station for sensory
information. All sensory pathways except olfaction (smell) synapse in the
thalamus before projecting to the appropriate cortical areas. The
hypothalamus regulates autonomic and endocrine functions. The pons is
involved in respiration and sleep cycles. The reticular formation regulates
arousal and consciousness.
Question 6: Damage to the hippocampus, located in the medial
temporal lobe, would most likely result in which of the following
deficits?
A. Inability to coordinate voluntary movement
B. Difficulty forming new memories (anterograde amnesia)
C. Loss of visual field in both eyes
D. Inability to comprehend spoken language
CORRECT ANSWER: B. Difficulty forming new memories (anterograde
amnesia)
Rationale: The hippocampus is critical for consolidating short-term
memory into long-term memory. Damage to this structure classically
produces anterograde amnesia, the inability to form new memories after
the injury. The cerebellum coordinates voluntary movement. The optic
chiasm is involved in visual field processing. Wernicke's area in the
temporal lobe is responsible for language comprehension.
Question 7: A patient exhibits profound personality changes,
disinhibition, and difficulty planning future actions following a TBI.
Which lobe of the brain is most likely injured?
A. Parietal lobe
B. Occipital lobe
, C. Frontal lobe
D. Temporal lobe
CORRECT ANSWER: C. Frontal lobe
Rationale: The frontal lobe, particularly the prefrontal cortex, is responsible
for executive functions including planning, organization, judgment,
inhibition, and personality regulation. Damage to this region produces the
described symptoms of disinhibition, poor planning, and personality
changes. The parietal lobe processes sensory information. The occipital
lobe is the primary visual center. The temporal lobe is involved in memory
and hearing.
Question 8: What is the primary function of the reticular activating
system (RAS)?
A. Regulation of hunger and satiety
B. Arousal and consciousness
C. Coordination of fine motor movements
D. Processing of olfactory stimuli
CORRECT ANSWER: B. Arousal and consciousness
Rationale: The reticular activating system (RAS) is a network of neurons in
the brainstem that regulates wakefulness, arousal, and the sleep-wake
cycle. Damage to the RAS can result in coma or persistent vegetative state.
The hypothalamus regulates hunger and satiety. The cerebellum
coordinates fine motor movements. Olfactory processing occurs in the
olfactory bulb and cortex.
Question 9: Which cranial nerve is responsible for pupil constriction
and accommodation?
A. CN II (Optic)
B. CN III (Oculomotor)
C. CN V (Trigeminal)
D. CN VII (Facial)
CORRECT ANSWER: B. CN III (Oculomotor)
Rationale: The oculomotor nerve (CN III) contains parasympathetic fibers
that innervate the pupillary sphincter muscle, causing pupil constriction. It
also controls most extraocular eye movements and accommodation. CN II
2026/2027 | ACBIS Certification Study Guide,
Brain Injury Association of America CBIS Exam
Prep, Practice Questions & Answers, TBI, ABI,
Neuroanatomy, Neuroimaging, Brain Injury
Assessment, Cognition, Communication, Behavioral
Changes, Rehabilitation, Recovery & Detailed
Rationales
Question 1: Which of the following best defines an Acquired Brain
Injury (ABI) according to the ACBIS study outline?
A. An injury to the brain that is hereditary, congenital, or degenerative in
nature
B. An injury to the brain that occurs after birth and is not hereditary,
congenital, degenerative, or induced by birth trauma
C. An injury to the brain caused exclusively by external physical force
D. An injury to the brain that occurs only during childhood developmental
stages
CORRECT ANSWER: B. An injury to the brain that occurs after birth and
is not hereditary, congenital, degenerative, or induced by birth trauma
Rationale: The ACBIS Examination Study Outline explicitly defines acquired
brain injury (ABI) as an injury to the brain that occurs after birth and is not
hereditary, congenital, degenerative, or induced by birth trauma. This
definition encompasses both traumatic brain injury (TBI) and non-
traumatic causes such as stroke, anoxia, and infection. Option A describes
conditions that are explicitly excluded from the ABI definition. Option C is
incorrect because ABI includes non-traumatic causes. Option D is
incorrect because ABI can occur at any age after birth.
Question 2: A patient with a Glasgow Coma Scale (GCS) 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 is the most widely used tool for
classifying TBI severity. According to standard classification: GCS 13–15
indicates mild TBI, GCS 9–12 indicates moderate TBI, and GCS 3–8
indicates severe TBI. A score of 10 falls within the moderate range. Option A
is incorrect because mild TBI requires a GCS of 13 or higher. Option C is
incorrect because severe TBI requires a GCS of 8 or lower. Option D is
incorrect because persistent vegetative state is a disorder of
consciousness, not a TBI severity classification.
Question 3: Which of the following 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 traumatic brain injury, particularly
among young children and older adults. Motor vehicle accidents are the
second leading cause. While assaults and sports-related injuries
contribute to TBI incidence, they are not the primary cause across all age
groups. The CDC and Brain Injury Association of America consistently
report falls as the most common mechanism of TBI.
Question 4: According to the medical model of disability, who is
considered the "power person" in the therapeutic relationship?
A. The patient
B. The family guardian
C. The physician or therapist
D. The insurance case manager
CORRECT ANSWER: C. The physician or therapist
Rationale: In the medical model, the physician or therapist holds the
authority and decision-making power. The patient is expected to cooperate
with the treatment team and adapt to the therapy schedule. This contrasts
with the interdependence paradigm, where the person with a disability is
considered the "power person." Options A, B, and D do not align with the
medical model's hierarchical structure.
,Question 5: Which brain structure serves as the primary relay station
for sensory information (except smell) traveling to the cerebral cortex?
A. Hypothalamus
B. Thalamus
C. Pons
D. Reticular formation
CORRECT ANSWER: B. Thalamus
Rationale: The thalamus is the brain's primary relay station for sensory
information. All sensory pathways except olfaction (smell) synapse in the
thalamus before projecting to the appropriate cortical areas. The
hypothalamus regulates autonomic and endocrine functions. The pons is
involved in respiration and sleep cycles. The reticular formation regulates
arousal and consciousness.
Question 6: Damage to the hippocampus, located in the medial
temporal lobe, would most likely result in which of the following
deficits?
A. Inability to coordinate voluntary movement
B. Difficulty forming new memories (anterograde amnesia)
C. Loss of visual field in both eyes
D. Inability to comprehend spoken language
CORRECT ANSWER: B. Difficulty forming new memories (anterograde
amnesia)
Rationale: The hippocampus is critical for consolidating short-term
memory into long-term memory. Damage to this structure classically
produces anterograde amnesia, the inability to form new memories after
the injury. The cerebellum coordinates voluntary movement. The optic
chiasm is involved in visual field processing. Wernicke's area in the
temporal lobe is responsible for language comprehension.
Question 7: A patient exhibits profound personality changes,
disinhibition, and difficulty planning future actions following a TBI.
Which lobe of the brain is most likely injured?
A. Parietal lobe
B. Occipital lobe
, C. Frontal lobe
D. Temporal lobe
CORRECT ANSWER: C. Frontal lobe
Rationale: The frontal lobe, particularly the prefrontal cortex, is responsible
for executive functions including planning, organization, judgment,
inhibition, and personality regulation. Damage to this region produces the
described symptoms of disinhibition, poor planning, and personality
changes. The parietal lobe processes sensory information. The occipital
lobe is the primary visual center. The temporal lobe is involved in memory
and hearing.
Question 8: What is the primary function of the reticular activating
system (RAS)?
A. Regulation of hunger and satiety
B. Arousal and consciousness
C. Coordination of fine motor movements
D. Processing of olfactory stimuli
CORRECT ANSWER: B. Arousal and consciousness
Rationale: The reticular activating system (RAS) is a network of neurons in
the brainstem that regulates wakefulness, arousal, and the sleep-wake
cycle. Damage to the RAS can result in coma or persistent vegetative state.
The hypothalamus regulates hunger and satiety. The cerebellum
coordinates fine motor movements. Olfactory processing occurs in the
olfactory bulb and cortex.
Question 9: Which cranial nerve is responsible for pupil constriction
and accommodation?
A. CN II (Optic)
B. CN III (Oculomotor)
C. CN V (Trigeminal)
D. CN VII (Facial)
CORRECT ANSWER: B. CN III (Oculomotor)
Rationale: The oculomotor nerve (CN III) contains parasympathetic fibers
that innervate the pupillary sphincter muscle, causing pupil constriction. It
also controls most extraocular eye movements and accommodation. CN II
