PART 1 of 5
This is Part 1 of the Spine Surgery
Fundamentals 2nd Edition
Comprehensive Test Bank by Vaccaro
and Fisicaro.
TABLE OF CONTENTS
Chapter 1: Anatomy and Biomechanics of the Spine — Questions 1–8
Chapter 2: Physical Examination and Diagnostic Imaging — Questions 9–16
Chapter 3: Cervical Trauma and Spinal Cord Injury — Questions 17–26
Chapter 4: Thoracolumbar Trauma — Questions 27–34
Chapter 5: Degenerative Cervical Disorders — Questions 35–42
Chapter 6: Degenerative Lumbar Disorders — Questions 43–50
Q1. A 55-year-old male undergoes a C5-C6 anterior cervical discectomy and fusion. The surgeon must
identify the correct level using intraoperative fluoroscopy. Which of the following anatomic
landmarks is most reliable for confirming the level of surgery in the cervical spine?
A. Hyoid bone at C3
B. Thyroid cartilage at C4-C5
C. Cricoid cartilage at C6
D. Carotid bifurcation at C3
Correct Answer: Cricoid cartilage at C6 ✅
Rationale: The correct answer is option C. The cricoid cartilage is the most reliable palpable
landmark in the anterior cervical spine, typically corresponding to the C6 vertebral level. It provides a
,consistent reference point for intraoperative level confirmation during anterior cervical approaches.
Option A is incorrect because the hyoid bone typically corresponds to the C3 level, but its position is
variable with neck flexion and extension, making it less reliable than the cricoid cartilage. Option B is
incorrect because the thyroid cartilage generally overlies the C4-C5 levels, but its mobility with
swallowing and neck movement makes it less reliable than the cricoid. Option D is incorrect because
the carotid bifurcation typically occurs at the C3-C4 level, but it is a vascular landmark not directly
visible during anterior cervical dissection and is not used for level confirmation. The concept tested is
the surgical anatomy of the anterior cervical spine, which is essential for accurate level localization
and preventing wrong-level surgery.
Q2. A 62-year-old female undergoes a posterior lumbar decompression and fusion. The surgeon
identifies the L4-L5 level using intraoperative imaging. Which of the following anatomic landmarks is
most useful for confirming the lumbosacral junction during posterior exposure?
A. Lumbosacral angle
B. Sacral promontory
C. Iliac crest at L4-L5
D. Spinous process of L5
Correct Answer: Sacral promontory ✅
Rationale: The correct answer is option B. The sacral promontory is the most reliable anatomic
landmark for confirming the lumbosacral junction during posterior exposure because it is the
anterior projection of the S1 vertebral body and marks the transition from the lumbar spine to the
sacrum. Option A is incorrect because the lumbosacral angle is a radiographic measurement, not a
palpable surgical landmark. Option C is incorrect because the iliac crest typically corresponds to the
L4-L5 interspace, but its relationship varies with patient body habitus and pelvic tilt. Option D is
incorrect because the spinous process of L5 can be difficult to distinguish from L4 in patients with
transitional anatomy or spondylolisthesis. The concept tested is the surgical anatomy of the
lumbosacral junction, which is critical for accurate level localization and preventing wrong-level
surgery.
Q3. A 48-year-old male undergoes a lumbar microdiscectomy for a herniated nucleus pulposus at L5-
S1. The surgeon must avoid injury to the nerve root during disc fragment removal. Which of the
following structures is most at risk of injury during the approach to the L5-S1 disc space?
A. L5 nerve root
B. S1 nerve root
,C. Cauda equina
D. Iliac vessels
Correct Answer: S1 nerve root ✅
Rationale: The correct answer is option B. The S1 nerve root is most at risk of injury during the
approach to the L5-S1 disc space because it exits the thecal sac at the L5-S1 level and courses
laterally and inferiorly over the disc space. Understanding the relationship between the exiting nerve
root and the disc space is critical for safe fragment removal. Option A is incorrect because the L5
nerve root exits at the L4-L5 level and is not the primary nerve at risk during L5-S1 disc surgery.
Option C is incorrect because the cauda equina is located more centrally and is less commonly
injured during standard microdiscectomy. Option D is incorrect because the iliac vessels are anterior
to the spine and are not encountered during a posterior approach. The concept tested is the surgical
anatomy of the lumbar nerve roots and their relationship to the disc spaces.
Q4. A 70-year-old female with osteoporosis undergoes a vertebroplasty for a painful osteoporotic
compression fracture at T12. Which of the following anatomic considerations is most important to
prevent cement leakage into the spinal canal?
A. Integrity of the posterior vertebral body wall
B. Height of the intervertebral disc
C. Position of the spinal cord
D. Size of the vertebral body
Correct Answer: Integrity of the posterior vertebral body wall ✅
Rationale: The correct answer is option A. The integrity of the posterior vertebral body wall is
the most important anatomic consideration during vertebroplasty because disruption of the
posterior cortex allows cement to leak into the epidural space and spinal canal, potentially causing
spinal cord or nerve root compression. Option B is incorrect because disc height is not directly
related to the risk of canal leakage. Option C is incorrect because the position of the spinal cord is
important but is secondary to the integrity of the posterior wall. Option D is incorrect because the
size of the vertebral body does not predict the risk of cement leakage. The concept tested is the
anatomic considerations for safe vertebroplasty, which is essential for preventing serious neurologic
complications.
, Q5. A 35-year-old male sustains a flexion-distraction injury at L1-L2 in a motor vehicle collision. The
surgeon plans a posterior instrumented fusion. Which of the following biomechanical principles is
most important for achieving a successful fusion in this patient?
A. Restoration of anterior column support
B. Restoration of posterior tension band
C. Restoration of sagittal alignment
D. Restoration of coronal alignment
Correct Answer: Restoration of posterior tension band ✅
Rationale: The correct answer is option B. A flexion-distraction injury disrupts the posterior
tension band (posterior ligamentous complex) and the middle column. Restoration of the posterior
tension band through posterior instrumented fusion is the most important biomechanical principle
for achieving stability and fusion in this injury pattern. Option A is incorrect because anterior column
support is important in burst fractures but is less critical in flexion-distraction injuries where the
anterior column is often intact. Option C is incorrect because sagittal alignment restoration is
important but is secondary to restoring the tension band. Option D is incorrect because coronal
alignment is not the primary concern in this injury pattern. The concept tested is the biomechanics of
thoracolumbar trauma and the principles of surgical stabilization.
Q6. A 58-year-old female undergoes an L4-L5 transforaminal lumbar interbody fusion. The surgeon
must avoid injury to the exiting nerve root during cage placement. Which of the following structures
defines the safe working zone for the transforaminal approach?
A. Superior articular process and pedicle
B. Inferior articular process and lamina
C. Spinous process and interspinous ligament
D. Facet joint and ligamentum flavum
Correct Answer: Superior articular process and pedicle ✅
Rationale: The correct answer is option A. The safe working zone for the transforaminal
lumbar interbody fusion is bounded by the superior articular process and the pedicle of the inferior
vertebra, which protect the exiting nerve root. Understanding these boundaries is critical for safe
This is Part 1 of the Spine Surgery
Fundamentals 2nd Edition
Comprehensive Test Bank by Vaccaro
and Fisicaro.
TABLE OF CONTENTS
Chapter 1: Anatomy and Biomechanics of the Spine — Questions 1–8
Chapter 2: Physical Examination and Diagnostic Imaging — Questions 9–16
Chapter 3: Cervical Trauma and Spinal Cord Injury — Questions 17–26
Chapter 4: Thoracolumbar Trauma — Questions 27–34
Chapter 5: Degenerative Cervical Disorders — Questions 35–42
Chapter 6: Degenerative Lumbar Disorders — Questions 43–50
Q1. A 55-year-old male undergoes a C5-C6 anterior cervical discectomy and fusion. The surgeon must
identify the correct level using intraoperative fluoroscopy. Which of the following anatomic
landmarks is most reliable for confirming the level of surgery in the cervical spine?
A. Hyoid bone at C3
B. Thyroid cartilage at C4-C5
C. Cricoid cartilage at C6
D. Carotid bifurcation at C3
Correct Answer: Cricoid cartilage at C6 ✅
Rationale: The correct answer is option C. The cricoid cartilage is the most reliable palpable
landmark in the anterior cervical spine, typically corresponding to the C6 vertebral level. It provides a
,consistent reference point for intraoperative level confirmation during anterior cervical approaches.
Option A is incorrect because the hyoid bone typically corresponds to the C3 level, but its position is
variable with neck flexion and extension, making it less reliable than the cricoid cartilage. Option B is
incorrect because the thyroid cartilage generally overlies the C4-C5 levels, but its mobility with
swallowing and neck movement makes it less reliable than the cricoid. Option D is incorrect because
the carotid bifurcation typically occurs at the C3-C4 level, but it is a vascular landmark not directly
visible during anterior cervical dissection and is not used for level confirmation. The concept tested is
the surgical anatomy of the anterior cervical spine, which is essential for accurate level localization
and preventing wrong-level surgery.
Q2. A 62-year-old female undergoes a posterior lumbar decompression and fusion. The surgeon
identifies the L4-L5 level using intraoperative imaging. Which of the following anatomic landmarks is
most useful for confirming the lumbosacral junction during posterior exposure?
A. Lumbosacral angle
B. Sacral promontory
C. Iliac crest at L4-L5
D. Spinous process of L5
Correct Answer: Sacral promontory ✅
Rationale: The correct answer is option B. The sacral promontory is the most reliable anatomic
landmark for confirming the lumbosacral junction during posterior exposure because it is the
anterior projection of the S1 vertebral body and marks the transition from the lumbar spine to the
sacrum. Option A is incorrect because the lumbosacral angle is a radiographic measurement, not a
palpable surgical landmark. Option C is incorrect because the iliac crest typically corresponds to the
L4-L5 interspace, but its relationship varies with patient body habitus and pelvic tilt. Option D is
incorrect because the spinous process of L5 can be difficult to distinguish from L4 in patients with
transitional anatomy or spondylolisthesis. The concept tested is the surgical anatomy of the
lumbosacral junction, which is critical for accurate level localization and preventing wrong-level
surgery.
Q3. A 48-year-old male undergoes a lumbar microdiscectomy for a herniated nucleus pulposus at L5-
S1. The surgeon must avoid injury to the nerve root during disc fragment removal. Which of the
following structures is most at risk of injury during the approach to the L5-S1 disc space?
A. L5 nerve root
B. S1 nerve root
,C. Cauda equina
D. Iliac vessels
Correct Answer: S1 nerve root ✅
Rationale: The correct answer is option B. The S1 nerve root is most at risk of injury during the
approach to the L5-S1 disc space because it exits the thecal sac at the L5-S1 level and courses
laterally and inferiorly over the disc space. Understanding the relationship between the exiting nerve
root and the disc space is critical for safe fragment removal. Option A is incorrect because the L5
nerve root exits at the L4-L5 level and is not the primary nerve at risk during L5-S1 disc surgery.
Option C is incorrect because the cauda equina is located more centrally and is less commonly
injured during standard microdiscectomy. Option D is incorrect because the iliac vessels are anterior
to the spine and are not encountered during a posterior approach. The concept tested is the surgical
anatomy of the lumbar nerve roots and their relationship to the disc spaces.
Q4. A 70-year-old female with osteoporosis undergoes a vertebroplasty for a painful osteoporotic
compression fracture at T12. Which of the following anatomic considerations is most important to
prevent cement leakage into the spinal canal?
A. Integrity of the posterior vertebral body wall
B. Height of the intervertebral disc
C. Position of the spinal cord
D. Size of the vertebral body
Correct Answer: Integrity of the posterior vertebral body wall ✅
Rationale: The correct answer is option A. The integrity of the posterior vertebral body wall is
the most important anatomic consideration during vertebroplasty because disruption of the
posterior cortex allows cement to leak into the epidural space and spinal canal, potentially causing
spinal cord or nerve root compression. Option B is incorrect because disc height is not directly
related to the risk of canal leakage. Option C is incorrect because the position of the spinal cord is
important but is secondary to the integrity of the posterior wall. Option D is incorrect because the
size of the vertebral body does not predict the risk of cement leakage. The concept tested is the
anatomic considerations for safe vertebroplasty, which is essential for preventing serious neurologic
complications.
, Q5. A 35-year-old male sustains a flexion-distraction injury at L1-L2 in a motor vehicle collision. The
surgeon plans a posterior instrumented fusion. Which of the following biomechanical principles is
most important for achieving a successful fusion in this patient?
A. Restoration of anterior column support
B. Restoration of posterior tension band
C. Restoration of sagittal alignment
D. Restoration of coronal alignment
Correct Answer: Restoration of posterior tension band ✅
Rationale: The correct answer is option B. A flexion-distraction injury disrupts the posterior
tension band (posterior ligamentous complex) and the middle column. Restoration of the posterior
tension band through posterior instrumented fusion is the most important biomechanical principle
for achieving stability and fusion in this injury pattern. Option A is incorrect because anterior column
support is important in burst fractures but is less critical in flexion-distraction injuries where the
anterior column is often intact. Option C is incorrect because sagittal alignment restoration is
important but is secondary to restoring the tension band. Option D is incorrect because coronal
alignment is not the primary concern in this injury pattern. The concept tested is the biomechanics of
thoracolumbar trauma and the principles of surgical stabilization.
Q6. A 58-year-old female undergoes an L4-L5 transforaminal lumbar interbody fusion. The surgeon
must avoid injury to the exiting nerve root during cage placement. Which of the following structures
defines the safe working zone for the transforaminal approach?
A. Superior articular process and pedicle
B. Inferior articular process and lamina
C. Spinous process and interspinous ligament
D. Facet joint and ligamentum flavum
Correct Answer: Superior articular process and pedicle ✅
Rationale: The correct answer is option A. The safe working zone for the transforaminal
lumbar interbody fusion is bounded by the superior articular process and the pedicle of the inferior
vertebra, which protect the exiting nerve root. Understanding these boundaries is critical for safe
