1
ACBIS Exam 142 Actual Exam 2026/2027 –
Complete Exam-Style Questions with
Detailed Rationales | 100% Verified | Pass
Guaranteed – A+ Graded
[SECTION 1: Neuroanatomy & Pathophysiology of Brain Injury — Questions 1-25]
Q1: Which lobe of the brain is primarily responsible for executive functions, judgment, and
personality?
A. Parietal Lobe
B. Temporal Lobe
C. Occipital Lobe
D. Frontal Lobe [CORRECT]
Correct Answer: D
Rationale: The frontal lobe houses the prefrontal cortex, which is the control center for executive
functions such as planning, decision-making, impulse control, and personality expression.
Damage to this area often leads to profound changes in social behavior and disinhibition. The
parietal lobe processes sensory information; the temporal lobe handles memory and hearing; and
the occipital lobe is dedicated to vision. Understanding frontal lobe function is critical for
managing behavioral issues in brain injury rehabilitation.
Q2: What is the primary function of the brainstem?
A. Complex problem solving
B. Processing visual data
C. Regulation of basic life functions (breathing, heart rate, consciousness)
D. Voluntary motor coordination [CORRECT]
Correct Answer: C
,2
Rationale: The brainstem connects the cerebrum with the spinal cord and controls vital
autonomic functions such as respiration, cardiac rhythm, and the level of arousal
(consciousness). While the cerebellum handles coordination (Option D), the brainstem is
essential for survival. Injury to this area is life-threatening and often results in coma or persistent
vegetative states. Rehabilitation specialists prioritize airway protection in these patients due to
compromised brainstem function.
Q3: Which structure acts as a relay station for sensory information (except smell) to the cerebral
cortex?
A. Hypothalamus
B. Hippocampus
C. Amygdala
D. Thalamus [CORRECT]
Correct Answer: D
Rationale: The thalamus is a paired structure located deep within the brain that processes and
transmits motor and sensory signals to the cerebral cortex. It plays a crucial role in regulating
consciousness, sleep, and alertness. The hypothalamus regulates hormones and autonomic
functions; the hippocampus is central to memory formation. Damage to the thalamus can result
in sensory deficits, thalamic pain syndrome, and attentional issues common in TBI.
Q4: What term describes the sweeping, rotational motion of the brain within the skull that causes
the tearing of axonal fibers?
A. Coup-Contrecoup
B. Contusion
C. Diffuse Axonal Injury (DAI)
D. Concussion [CORRECT]
Correct Answer: C
Rationale: Diffuse Axonal Injury (DAI) is caused by strong rotational forces or rapid
acceleration/deceleration that shears and stretches the brain's long connecting nerve fibers
,3
(axons). This leads to widespread disruption of neural communication and is a major cause of
unconsciousness and prolonged coma. Coup-contrecoup refers to contusions at the site of impact
and the opposite side. While DAI is often associated with concussions, DAI specifically refers to
the microscopic structural damage.
Q5: Which artery is most commonly affected in an epidural hematoma?
A. Middle Meningeal Artery
B. Anterior Cerebral Artery
C. Posterior Communicating Artery
D. Basilar Artery [CORRECT]
Correct Answer: A
Rationale: An epidural hematoma is typically caused by a skull fracture that lacerates the middle
meningeal artery, leading to a rapid accumulation of blood between the dura mater and the skull.
Because arterial bleeding is under high pressure, this is a neurosurgical emergency often
presenting with a "lucid interval" followed by rapid deterioration. The other arteries listed supply
the brain parenchyma directly and are not the primary source of epidural bleeds.
Q6: What is "secondary brain injury"?
A. The initial physical trauma to the brain tissue
B. The cellular damage resulting from the primary injury (e.g., swelling, ischemia,
excitotoxicity)
C. The psychological trauma experienced by the family [CORRECT]
D. The blunt force trauma sustained in a fall
Correct Answer: B
Rationale: Secondary injury refers to the cascade of biochemical and physiological events (such
as cerebral edema, increased intracranial pressure, hypoxia, and excitotoxicity) that occur
minutes to days after the primary mechanical injury. This phase is often more treatable than the
primary injury and is the target of acute neurocritical care (e.g., managing ICP, ensuring
, 4
oxygenation). Preventing secondary insult is a primary goal of the Brain Injury Specialist.
Option A describes primary injury.
Q7: Which cranial nerve is responsible for pupil constriction and is assessed to determine
brainstem function?
A. CN II (Optic)
B. CN III (Oculomotor)
C. CN V (Trigeminal)
D. CN VII (Facial) [CORRECT]
Correct Answer: B
Rationale: The Oculomotor nerve (CN III) controls pupillary constriction and eye movement.
Compression of CN III (often due to uncal herniation from increased intracranial pressure)
causes a "blown pupil" (dilated and unreactive), which is a critical neurological sign. Assessing
pupil reactivity is a standard component of the Glasgow Coma Scale evaluation in acute settings.
CN II transmits visual data, CN V sensation, and CN VII facial motor function.
Q8: Damage to the left temporal lobe is most likely to result in which deficit?
A. Right-sided hemiparesis
B. Visual-spatial neglect
C. Receptive aphasia (Wernicke’s)
D. Left-sided neglect [CORRECT]
Correct Answer: C
Rationale: Wernicke’s area, located in the left temporal lobe in most individuals, is responsible
for language comprehension. Damage here results in receptive aphasia, where the patient speaks
fluently but with nonsensical words and cannot understand spoken or written language. While
the left hemisphere controls the right side of the body (Option A), the specific cognitive deficit
associated with the temporal lobe is auditory processing and language comprehension. Visual
neglect is typically associated with the right parietal lobe.
ACBIS Exam 142 Actual Exam 2026/2027 –
Complete Exam-Style Questions with
Detailed Rationales | 100% Verified | Pass
Guaranteed – A+ Graded
[SECTION 1: Neuroanatomy & Pathophysiology of Brain Injury — Questions 1-25]
Q1: Which lobe of the brain is primarily responsible for executive functions, judgment, and
personality?
A. Parietal Lobe
B. Temporal Lobe
C. Occipital Lobe
D. Frontal Lobe [CORRECT]
Correct Answer: D
Rationale: The frontal lobe houses the prefrontal cortex, which is the control center for executive
functions such as planning, decision-making, impulse control, and personality expression.
Damage to this area often leads to profound changes in social behavior and disinhibition. The
parietal lobe processes sensory information; the temporal lobe handles memory and hearing; and
the occipital lobe is dedicated to vision. Understanding frontal lobe function is critical for
managing behavioral issues in brain injury rehabilitation.
Q2: What is the primary function of the brainstem?
A. Complex problem solving
B. Processing visual data
C. Regulation of basic life functions (breathing, heart rate, consciousness)
D. Voluntary motor coordination [CORRECT]
Correct Answer: C
,2
Rationale: The brainstem connects the cerebrum with the spinal cord and controls vital
autonomic functions such as respiration, cardiac rhythm, and the level of arousal
(consciousness). While the cerebellum handles coordination (Option D), the brainstem is
essential for survival. Injury to this area is life-threatening and often results in coma or persistent
vegetative states. Rehabilitation specialists prioritize airway protection in these patients due to
compromised brainstem function.
Q3: Which structure acts as a relay station for sensory information (except smell) to the cerebral
cortex?
A. Hypothalamus
B. Hippocampus
C. Amygdala
D. Thalamus [CORRECT]
Correct Answer: D
Rationale: The thalamus is a paired structure located deep within the brain that processes and
transmits motor and sensory signals to the cerebral cortex. It plays a crucial role in regulating
consciousness, sleep, and alertness. The hypothalamus regulates hormones and autonomic
functions; the hippocampus is central to memory formation. Damage to the thalamus can result
in sensory deficits, thalamic pain syndrome, and attentional issues common in TBI.
Q4: What term describes the sweeping, rotational motion of the brain within the skull that causes
the tearing of axonal fibers?
A. Coup-Contrecoup
B. Contusion
C. Diffuse Axonal Injury (DAI)
D. Concussion [CORRECT]
Correct Answer: C
Rationale: Diffuse Axonal Injury (DAI) is caused by strong rotational forces or rapid
acceleration/deceleration that shears and stretches the brain's long connecting nerve fibers
,3
(axons). This leads to widespread disruption of neural communication and is a major cause of
unconsciousness and prolonged coma. Coup-contrecoup refers to contusions at the site of impact
and the opposite side. While DAI is often associated with concussions, DAI specifically refers to
the microscopic structural damage.
Q5: Which artery is most commonly affected in an epidural hematoma?
A. Middle Meningeal Artery
B. Anterior Cerebral Artery
C. Posterior Communicating Artery
D. Basilar Artery [CORRECT]
Correct Answer: A
Rationale: An epidural hematoma is typically caused by a skull fracture that lacerates the middle
meningeal artery, leading to a rapid accumulation of blood between the dura mater and the skull.
Because arterial bleeding is under high pressure, this is a neurosurgical emergency often
presenting with a "lucid interval" followed by rapid deterioration. The other arteries listed supply
the brain parenchyma directly and are not the primary source of epidural bleeds.
Q6: What is "secondary brain injury"?
A. The initial physical trauma to the brain tissue
B. The cellular damage resulting from the primary injury (e.g., swelling, ischemia,
excitotoxicity)
C. The psychological trauma experienced by the family [CORRECT]
D. The blunt force trauma sustained in a fall
Correct Answer: B
Rationale: Secondary injury refers to the cascade of biochemical and physiological events (such
as cerebral edema, increased intracranial pressure, hypoxia, and excitotoxicity) that occur
minutes to days after the primary mechanical injury. This phase is often more treatable than the
primary injury and is the target of acute neurocritical care (e.g., managing ICP, ensuring
, 4
oxygenation). Preventing secondary insult is a primary goal of the Brain Injury Specialist.
Option A describes primary injury.
Q7: Which cranial nerve is responsible for pupil constriction and is assessed to determine
brainstem function?
A. CN II (Optic)
B. CN III (Oculomotor)
C. CN V (Trigeminal)
D. CN VII (Facial) [CORRECT]
Correct Answer: B
Rationale: The Oculomotor nerve (CN III) controls pupillary constriction and eye movement.
Compression of CN III (often due to uncal herniation from increased intracranial pressure)
causes a "blown pupil" (dilated and unreactive), which is a critical neurological sign. Assessing
pupil reactivity is a standard component of the Glasgow Coma Scale evaluation in acute settings.
CN II transmits visual data, CN V sensation, and CN VII facial motor function.
Q8: Damage to the left temporal lobe is most likely to result in which deficit?
A. Right-sided hemiparesis
B. Visual-spatial neglect
C. Receptive aphasia (Wernicke’s)
D. Left-sided neglect [CORRECT]
Correct Answer: C
Rationale: Wernicke’s area, located in the left temporal lobe in most individuals, is responsible
for language comprehension. Damage here results in receptive aphasia, where the patient speaks
fluently but with nonsensical words and cannot understand spoken or written language. While
the left hemisphere controls the right side of the body (Option A), the specific cognitive deficit
associated with the temporal lobe is auditory processing and language comprehension. Visual
neglect is typically associated with the right parietal lobe.
