OCS Certification Exam Prep 2026: Updated
Practice Questions, Comprehensive Orthopedic
Therapy Specialist Review, Detailed
Explanations, Verified Answers, Complete
Success Workbook
Orthopaedic Certified Specialist (OCS) — 2026 Edition
SECTION 1: EXAMINATION/EVALUATION/DIAGNOSIS (20%)
Question 1
A 45-year-old female presents with insidious onset of bilateral hand numbness and
weakness. Symptoms are worse at night, and she frequently wakes up needing to
"shake out" her hands. Examination reveals thenar atrophy bilaterally and
diminished sensation in the median nerve distribution. Which is the MOST
appropriate next step?
A. Cervical spine MRI to rule out cervical radiculopathy
B. Nerve conduction studies of the median nerves
C. Wrist splinting and activity modification
D. Referral for surgical consultation
Rationale: The presentation is classic for bilateral carpal tunnel syndrome, with
thenar atrophy indicating moderate-to-severe disease. While cervical radiculopathy
should be considered in the differential, the bilateral presentation with night-time
symptoms and median nerve distribution is most consistent with carpal tunnel
syndrome. Nerve conduction studies are the gold standard for diagnosis and will
help confirm the diagnosis and guide treatment.
Question 2
A 28-year-old recreational soccer player presents with acute onset of right knee
pain after a non-contact pivoting injury. He reports hearing a "pop" and the knee is
,swollen and unstable. Lachman test is markedly positive. Which is the MOST
likely diagnosis?
A. Medial meniscus tear
B. Anterior cruciate ligament (ACL) tear
C. Posterior cruciate ligament (PCL) tear
D. Patellar dislocation
Rationale: The mechanism (non-contact pivoting), "pop" sound, hemarthrosis, and
positive Lachman test are classic findings of an ACL tear. The Lachman test is the
most sensitive test for ACL integrity.
Question 3
A 55-year-old male presents with low back pain after lifting a heavy object. Pain
radiates into the right buttock and down the lateral leg to the dorsum of the foot.
He also notes foot drop. Which nerve root is MOST likely affected?
A. L4
B. L5
C. S1
D. S2
Rationale: The L5 nerve root innervates the dorsiflexors of the ankle and extensor
hallucis longus. Radicular pain along the lateral leg to the dorsum of the foot with
foot drop is classic L5 radiculopathy.
Question 4
A patient presents with insidious onset of shoulder pain and limited active and
passive range of motion in all directions. Radiographs are unremarkable. The
patient has a history of diabetes mellitus. Which is the MOST likely diagnosis?
A. Rotator cuff tear
B. Adhesive capsulitis
C. Glenohumeral osteoarthritis
D. Acromioclavicular joint arthritis
,Rationale: Adhesive capsulitis (frozen shoulder) presents with insidious onset,
global restriction of both active and passive ROM, and is strongly associated with
diabetes mellitus. Radiographs are typically normal. Rotator cuff tear would
present with weakness and a different pattern of ROM loss.
Question 5
Which of the following is the most sensitive special test for detecting a meniscal
tear of the knee?
A. McMurray test
B. Lachman test
C. Anterior drawer test
D. Valgus stress test
Rationale: The McMurray test is the most commonly used special test for
meniscal tears. The Lachman and anterior drawer tests assess ACL integrity, and
the valgus stress test assesses the MCL.
Question 6
A patient with suspected cervical myelopathy presents with which constellation of
findings?
A. Bilateral hand numbness, gait disturbance, and positive Hoffmann sign
B. Unilateral neck pain with radicular symptoms
C. Isolated neck stiffness without neurological findings
D. Bilateral leg weakness only
Rationale: Cervical myelopathy presents with bilateral upper extremity symptoms
(numbness, clumsiness), gait disturbance, and long-tract signs such as a positive
Hoffmann sign, inverted supinator sign, and hyperreflexia.
Question 7
A 50-year-old flooring specialist reports anterior knee pain with prolonged sitting
and stair climbing. Physical exam reveals tenderness at the patellar tendon. Which
is the MOST likely diagnosis?
, A. Patellofemoral pain syndrome
B. Patellar tendinopathy
C. Prepatellar bursitis
D. Meniscal tear
Rationale: Patellar tendinopathy presents with anterior knee pain, tenderness at the
patellar tendon (typically at the inferior pole of the patella), and pain with loading
activities such as stair climbing and prolonged sitting (the "theater sign").
Question 8
During gait analysis, a patient demonstrates excessive hip adduction and internal
rotation during stance. Which muscle group is most likely weak?
A. Hip flexors
B. Hip abductors (gluteus medius) and external rotators
C. Hip extensors (gluteus maximus)
D. Knee extensors (quadriceps)
Rationale: Weakness of the hip abductors (gluteus medius) and external rotators
allows the contralateral pelvis to drop and the hip to adduct and internally rotate
during stance phase.
Question 9
Which of the following best describes the arthrokinematic movement occurring at
the glenohumeral joint during shoulder abduction?
A. Inferior glide of the humeral head
B. Superior glide of the humeral head
C. Anterior glide of the humeral head
D. Posterior glide of the humeral head
Rationale: During shoulder abduction, the convex humeral head rolls superiorly
and glides inferiorly (convex-on-concave rule). This inferior glide is essential for
maintaining the subacromial space and preventing impingement.
Question 10
Practice Questions, Comprehensive Orthopedic
Therapy Specialist Review, Detailed
Explanations, Verified Answers, Complete
Success Workbook
Orthopaedic Certified Specialist (OCS) — 2026 Edition
SECTION 1: EXAMINATION/EVALUATION/DIAGNOSIS (20%)
Question 1
A 45-year-old female presents with insidious onset of bilateral hand numbness and
weakness. Symptoms are worse at night, and she frequently wakes up needing to
"shake out" her hands. Examination reveals thenar atrophy bilaterally and
diminished sensation in the median nerve distribution. Which is the MOST
appropriate next step?
A. Cervical spine MRI to rule out cervical radiculopathy
B. Nerve conduction studies of the median nerves
C. Wrist splinting and activity modification
D. Referral for surgical consultation
Rationale: The presentation is classic for bilateral carpal tunnel syndrome, with
thenar atrophy indicating moderate-to-severe disease. While cervical radiculopathy
should be considered in the differential, the bilateral presentation with night-time
symptoms and median nerve distribution is most consistent with carpal tunnel
syndrome. Nerve conduction studies are the gold standard for diagnosis and will
help confirm the diagnosis and guide treatment.
Question 2
A 28-year-old recreational soccer player presents with acute onset of right knee
pain after a non-contact pivoting injury. He reports hearing a "pop" and the knee is
,swollen and unstable. Lachman test is markedly positive. Which is the MOST
likely diagnosis?
A. Medial meniscus tear
B. Anterior cruciate ligament (ACL) tear
C. Posterior cruciate ligament (PCL) tear
D. Patellar dislocation
Rationale: The mechanism (non-contact pivoting), "pop" sound, hemarthrosis, and
positive Lachman test are classic findings of an ACL tear. The Lachman test is the
most sensitive test for ACL integrity.
Question 3
A 55-year-old male presents with low back pain after lifting a heavy object. Pain
radiates into the right buttock and down the lateral leg to the dorsum of the foot.
He also notes foot drop. Which nerve root is MOST likely affected?
A. L4
B. L5
C. S1
D. S2
Rationale: The L5 nerve root innervates the dorsiflexors of the ankle and extensor
hallucis longus. Radicular pain along the lateral leg to the dorsum of the foot with
foot drop is classic L5 radiculopathy.
Question 4
A patient presents with insidious onset of shoulder pain and limited active and
passive range of motion in all directions. Radiographs are unremarkable. The
patient has a history of diabetes mellitus. Which is the MOST likely diagnosis?
A. Rotator cuff tear
B. Adhesive capsulitis
C. Glenohumeral osteoarthritis
D. Acromioclavicular joint arthritis
,Rationale: Adhesive capsulitis (frozen shoulder) presents with insidious onset,
global restriction of both active and passive ROM, and is strongly associated with
diabetes mellitus. Radiographs are typically normal. Rotator cuff tear would
present with weakness and a different pattern of ROM loss.
Question 5
Which of the following is the most sensitive special test for detecting a meniscal
tear of the knee?
A. McMurray test
B. Lachman test
C. Anterior drawer test
D. Valgus stress test
Rationale: The McMurray test is the most commonly used special test for
meniscal tears. The Lachman and anterior drawer tests assess ACL integrity, and
the valgus stress test assesses the MCL.
Question 6
A patient with suspected cervical myelopathy presents with which constellation of
findings?
A. Bilateral hand numbness, gait disturbance, and positive Hoffmann sign
B. Unilateral neck pain with radicular symptoms
C. Isolated neck stiffness without neurological findings
D. Bilateral leg weakness only
Rationale: Cervical myelopathy presents with bilateral upper extremity symptoms
(numbness, clumsiness), gait disturbance, and long-tract signs such as a positive
Hoffmann sign, inverted supinator sign, and hyperreflexia.
Question 7
A 50-year-old flooring specialist reports anterior knee pain with prolonged sitting
and stair climbing. Physical exam reveals tenderness at the patellar tendon. Which
is the MOST likely diagnosis?
, A. Patellofemoral pain syndrome
B. Patellar tendinopathy
C. Prepatellar bursitis
D. Meniscal tear
Rationale: Patellar tendinopathy presents with anterior knee pain, tenderness at the
patellar tendon (typically at the inferior pole of the patella), and pain with loading
activities such as stair climbing and prolonged sitting (the "theater sign").
Question 8
During gait analysis, a patient demonstrates excessive hip adduction and internal
rotation during stance. Which muscle group is most likely weak?
A. Hip flexors
B. Hip abductors (gluteus medius) and external rotators
C. Hip extensors (gluteus maximus)
D. Knee extensors (quadriceps)
Rationale: Weakness of the hip abductors (gluteus medius) and external rotators
allows the contralateral pelvis to drop and the hip to adduct and internally rotate
during stance phase.
Question 9
Which of the following best describes the arthrokinematic movement occurring at
the glenohumeral joint during shoulder abduction?
A. Inferior glide of the humeral head
B. Superior glide of the humeral head
C. Anterior glide of the humeral head
D. Posterior glide of the humeral head
Rationale: During shoulder abduction, the convex humeral head rolls superiorly
and glides inferiorly (convex-on-concave rule). This inferior glide is essential for
maintaining the subacromial space and preventing impingement.
Question 10
