OPC Orthotics Written Practice Questions - OPC Orthotics Written Certification Examination Exam - OPC Orthotics Written Practice Questions - OPC Orthotics Written Certification Examination Exam

Question 1

A 6-year-old patient with an L4 level myelomeningocele presents for a gait assessment. During the physical exam, you note a 15-degree knee extension lag, 5 degrees of ankle dorsiflexion, and 3/5 strength in the tibialis anterior. During observational gait analysis, you observe excessive knee flexion during mid-stance. What is the primary biomechanical cause of this gait deviation?

Triceps surae spasticity causing premature heel rise and secondary knee flexion Weakness of the quadriceps failing to prevent knee flexion coupled with insufficient plantarflexion-knee extension coupling Ankle dorsiflexion contracture shifts the ground reaction force vector anterior to the knee joint center Hip flexor spasticity leading to anterior pelvic tilt and compensatory hip and knee flexion

Correct Answer:

Weakness of the quadriceps failing to prevent knee flexion coupled with insufficient plantarflexion-knee extension coupling

Question 2

During the clinical examination of a patient with limited ankle dorsiflexion, you perform the Silfverskiöld test. You note that ankle dorsiflexion is limited to -5 degrees (plantarflexed) with the knee fully extended, but increases to 15 degrees of dorsiflexion when the knee is flexed to 90 degrees. How should you interpret these findings?

The patient has an isolated contracture of the soleus muscle. The patient has an isolated contracture of the gastrocnemius muscle. The patient has a bony block within the talocrural joint. The patient has a combined contracture of both the gastrocnemius and soleus muscles.

Correct Answer:

The patient has an isolated contracture of the gastrocnemius muscle.

Question 3

During observational gait analysis, you observe that a patient exhibits vaulting (premature plantarflexion) on the contralateral limb during the swing phase of the orthotic limb. Which of the following is the most likely cause of this deviation?

The orthosis is too short, causing a leg length discrepancy. Inadequate clearance of the orthotic limb due to excessive dorsiflexion resistance or weakness of hip/knee flexors. Contralateral hip abductor weakness causing Trendelenburg sign. Excessive heel lift on the orthotic side.

Correct Answer:

Inadequate clearance of the orthotic limb due to excessive dorsiflexion resistance or weakness of hip/knee flexors.

Question 4

You observe a patient demonstrating a Trendelenburg gait pattern. The patient's pelvis drops on the right side during the swing phase of the right leg. Which muscle group is weak, and on which side is the weakness located?

Left hip abductors (gluteus medius) Right hip abductors (gluteus medius) Left hip adductors Right hip adductors

Correct Answer:

Left hip abductors (gluteus medius)

Question 5

During a biomechanical assessment, a patient weighing 80 kg (approximately 800 N) is evaluated using a force plate. At 15% of the gait cycle (loading response), the ground reaction force (GRF) vector is equal to 800 N and is located 4 cm posterior to the knee joint axis in the sagittal plane. What is the magnitude and direction of the knee moment generated by this force?

32 Nm flexion moment 32 Nm extension moment 3.2 Nm flexion moment 3.2 Nm extension moment

Correct Answer:

32 Nm flexion moment

Question 1

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Prepare with the OPC Orthotics Written Practice Questions - OPC Orthotics Written Certification Examination Exam practice quiz. This question bank includes 100 questions covering patient, knee, orthosis, custom, and ankle. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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OPC Orthotics Written Practice Questions - OPC Orthotics Written Certification Examination Exam

This practice set contains 100 questions from the matching question bank and focuses on patient, knee, orthosis, custom, and ankle. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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OPC Orthotics Written Practice Questions - OPC Orthotics Written Certification Examination Exam

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