6. Spine MCQs

A patient undergoes an anterior cervical discectomy and fusion (ACDF) for a right-sided C5-C6 paracentral disc herniation. Which nerve root is most likely compressed by this disc herniation?

When placing a pedicle screw in the lumbar spine, the surgeon identifies the starting point at the intersection of the pars interarticularis, the midpoint of the transverse process, and the superior articular facet. Medial breach of the pedicle screw at the L4 vertebral body most directly endangers the dural sac and which of the following nerve roots?

A patient presents with weakness in wrist extension and altered sensation over the dorsal web space of the hand. An MRI reveals a herniated cervical disc. Between which two cervical vertebrae is the herniation most likely located?

During a posterior cervical approach, the surgeon dissects laterally. At which level does the vertebral artery typically enter the transverse foramen and become at risk during lateral mass screw placement?

A patient presents with acute weakness of the quadriceps and an absent patellar reflex. MRI shows a far lateral (extraforaminal) disc herniation at L4-L5. Which nerve root is most likely compressed?

Which portion of the medial ulnar collateral ligament complex is the primary restraint to valgus stress at the elbow during the late cocking phase of throwing?

During an anterior cervical discectomy and fusion (ACDF), self-retaining retractors are placed. Which anatomical structure is at greatest risk of injury leading to Horner's syndrome if the longus colli muscles are retracted too far laterally?

During a posterior approach to the cervical spine at C1-C2, the surgeon must be careful to avoid injury to the vertebral artery. At this level, the vertebral artery lies directly superior to which anatomical structure?

During a retroperitoneal approach to the anterior lumbar spine at L4-L5, which of the following vascular structures must be mobilized from left to right to safely expose the disc space?

When inserting a pedicle screw at the T8 level, what is the anatomical relationship of the exiting nerve root to the corresponding pedicle?

In the lumbar spine, the facet joints are oriented primarily in which plane, thereby allowing for significant flexion and extension but heavily limiting axial rotation?

When placing pedicle screws in the lumbar spine, which level typically requires the greatest medial angulation?

In the typical cervical spine, the vertebral artery most commonly enters the transverse foramen at which vertebral level?

The alar ligaments are essential primary stabilizers of the craniocervical junction. What is their primary biomechanical function?

A patient presents with weakness in ankle dorsiflexion and numbness in the first dorsal web space. MRI demonstrates a far lateral (extra-foraminal) disc herniation at the L4-L5 level. Which nerve root is most likely compressed?

A surgeon is performing an anterior approach to the cervical spine at the C5-C6 level. The recurrent laryngeal nerve is at risk. Which of the following describes its typical anatomical course on the right side?

In lumbar pedicle screw placement, the intersection of the pars interarticularis, the transverse process, and the superior articular facet serves as a landmark. The exiting nerve root at the L4-L5 level is:

In the spine, the vertebral artery typically enters the transverse foramen at which cervical level?

In the lumbar spine, a far-lateral (extraforaminal) disc herniation at the L4-L5 level will most likely result in direct compression of which neural structure?

During an anterior cervical discectomy and fusion (ACDF), excessive lateral dissection risks injury to the vertebral artery. At which cervical level does the vertebral artery typically enter the transverse foramen?