NCCAOM Biomedicine Mock Board Exam |
Comprehensive Practice Test, Correct Answers & Step-by-
Step Rationales – Latest Update 2026/2027
QUESTION 1
Which clinical presentation represents a surgical emergency requiring
immediate referral for suspected Cauda Equina Syndrome?
• A. Chronic low back pain radiating to the lateral calf with normal
reflexes
• B. New-onset saddle anesthesia, acute urinary retention, and
progressive lower extremity motor weakness
• C. Intermittent localized lower back stiffness that improves with
light walking
• D. Sharp, shooting pain down the posterior thigh triggered by
straight leg raise testing at 45 degrees
Correct Answer: B. New-onset saddle anesthesia, acute urinary
retention, and progressive lower extremity motor weakness
Detailed Rationale: Cauda equina syndrome results from compression
of the lumbar and sacral nerve roots, presenting as a surgical
emergency characterized by saddle anesthesia, bowel/bladder
dysfunction (retention or incontinence), and severe motor weakness.
QUESTION 2
,A patient presenting with a sudden, excruciating "thunderclap"
headache described as the "worst headache of my life" most likely has
which emergent condition?
• A. Tension headache
• B. Subarachnoid hemorrhage
• C. Migraine without aura
• D. Cluster headache
Correct Answer: B. Subarachnoid hemorrhage
Detailed Rationale: A thunderclap headache reaching maximum
intensity within seconds to minutes is a classic red flag for a ruptured
cerebral aneurysm causing subarachnoid hemorrhage.
QUESTION 3
Murphy's sign—elicited by deep palpation of the right upper quadrant
during inspiration, causing sudden arrest of breathing due to sharp
pain—is characteristic of:
• A. Acute appendicitis
• B. Acute cholecystitis
• C. Acute pancreatitis
• D. Acute pyelonephritis
Correct Answer: B. Acute cholecystitis
Detailed Rationale: Murphy's sign indicates inflammation of the
gallbladder (cholecystitis) as the inflamed gallbladder descends and
contacts the examining fingers during inspiration.
,QUESTION 4
Which orthopedic test involves having the patient hold their wrists in
complete and forced flexion for 60 seconds to reproduce numbness and
tingling in the median nerve distribution?
• A. Tinel's sign
• B. Phalen's test
• C. Finkelstein's test
• D. Neer's test
Correct Answer: B. Phalen's test
Detailed Rationale: Phalen's test increases pressure within the carpal
tunnel, reproducing symptoms of carpal tunnel syndrome (median
nerve compression).
QUESTION 5
A positive Thompson test (absence of plantarflexion when the calf
muscle is squeezed) indicates a complete rupture of which structure?
• A. Plantaris tendon
• B. Achilles tendon
• C. Tibialis anterior tendon
• D. Peroneus longus tendon
Correct Answer: B. Achilles tendon
Detailed Rationale: The Thompson squeeze test evaluates the integrity
of the Achilles tendon; a lack of passive plantarflexion when squeezing
the calf confirms a complete tear.
, QUESTION 6
Which orthopedic test is designed to assess bicipital tendinitis by
resisting forward flexion of the shoulder with the elbow extended and
forearm supinated?
• A. Drop arm test
• B. Speed's test
• C. Apprehension test
• D. Hawkins-Kennedy test
Correct Answer: B. Speed's test
Detailed Rationale: Speed's test places stress on the long head of the
biceps tendon, eliciting pain in the bicipital groove when inflammation
or tendinitis is present.
QUESTION 7
Which specialized orthopedic knee test is considered most sensitive and
specific for evaluating an anterior cruciate ligament (ACL) tear?
• A. McMurray test
• B. Apley grinding test
• C. Lachman test
• D. Valgus stress test
Correct Answer: C. Lachman test
Detailed Rationale: The Lachman test is performed with the knee flexed
at 20-30 degrees and translates the tibia anteriorly; excessive laxity or a
soft endpoint indicates an ACL tear.
Comprehensive Practice Test, Correct Answers & Step-by-
Step Rationales – Latest Update 2026/2027
QUESTION 1
Which clinical presentation represents a surgical emergency requiring
immediate referral for suspected Cauda Equina Syndrome?
• A. Chronic low back pain radiating to the lateral calf with normal
reflexes
• B. New-onset saddle anesthesia, acute urinary retention, and
progressive lower extremity motor weakness
• C. Intermittent localized lower back stiffness that improves with
light walking
• D. Sharp, shooting pain down the posterior thigh triggered by
straight leg raise testing at 45 degrees
Correct Answer: B. New-onset saddle anesthesia, acute urinary
retention, and progressive lower extremity motor weakness
Detailed Rationale: Cauda equina syndrome results from compression
of the lumbar and sacral nerve roots, presenting as a surgical
emergency characterized by saddle anesthesia, bowel/bladder
dysfunction (retention or incontinence), and severe motor weakness.
QUESTION 2
,A patient presenting with a sudden, excruciating "thunderclap"
headache described as the "worst headache of my life" most likely has
which emergent condition?
• A. Tension headache
• B. Subarachnoid hemorrhage
• C. Migraine without aura
• D. Cluster headache
Correct Answer: B. Subarachnoid hemorrhage
Detailed Rationale: A thunderclap headache reaching maximum
intensity within seconds to minutes is a classic red flag for a ruptured
cerebral aneurysm causing subarachnoid hemorrhage.
QUESTION 3
Murphy's sign—elicited by deep palpation of the right upper quadrant
during inspiration, causing sudden arrest of breathing due to sharp
pain—is characteristic of:
• A. Acute appendicitis
• B. Acute cholecystitis
• C. Acute pancreatitis
• D. Acute pyelonephritis
Correct Answer: B. Acute cholecystitis
Detailed Rationale: Murphy's sign indicates inflammation of the
gallbladder (cholecystitis) as the inflamed gallbladder descends and
contacts the examining fingers during inspiration.
,QUESTION 4
Which orthopedic test involves having the patient hold their wrists in
complete and forced flexion for 60 seconds to reproduce numbness and
tingling in the median nerve distribution?
• A. Tinel's sign
• B. Phalen's test
• C. Finkelstein's test
• D. Neer's test
Correct Answer: B. Phalen's test
Detailed Rationale: Phalen's test increases pressure within the carpal
tunnel, reproducing symptoms of carpal tunnel syndrome (median
nerve compression).
QUESTION 5
A positive Thompson test (absence of plantarflexion when the calf
muscle is squeezed) indicates a complete rupture of which structure?
• A. Plantaris tendon
• B. Achilles tendon
• C. Tibialis anterior tendon
• D. Peroneus longus tendon
Correct Answer: B. Achilles tendon
Detailed Rationale: The Thompson squeeze test evaluates the integrity
of the Achilles tendon; a lack of passive plantarflexion when squeezing
the calf confirms a complete tear.
, QUESTION 6
Which orthopedic test is designed to assess bicipital tendinitis by
resisting forward flexion of the shoulder with the elbow extended and
forearm supinated?
• A. Drop arm test
• B. Speed's test
• C. Apprehension test
• D. Hawkins-Kennedy test
Correct Answer: B. Speed's test
Detailed Rationale: Speed's test places stress on the long head of the
biceps tendon, eliciting pain in the bicipital groove when inflammation
or tendinitis is present.
QUESTION 7
Which specialized orthopedic knee test is considered most sensitive and
specific for evaluating an anterior cruciate ligament (ACL) tear?
• A. McMurray test
• B. Apley grinding test
• C. Lachman test
• D. Valgus stress test
Correct Answer: C. Lachman test
Detailed Rationale: The Lachman test is performed with the knee flexed
at 20-30 degrees and translates the tibia anteriorly; excessive laxity or a
soft endpoint indicates an ACL tear.
