Back Flashcards
A 55-year-old man with severe coughing is admitted to the hospital. Radiologic examination is consistent with tuberculosis of the right lung, with extension to the thoracic vertebral bodies of T6 and T7, producing a “gibbus deformity.” Which of the following conditions is most likely also to be confirmed by radiologic examination?
A. Hyperlordosis B. Hyperkyphosis C. Scoliosis D. Spina bifida E. Osteoarthritis
B. Hyperkyphosis
A 68-year-old man is admitted to the hospital due to severe back pain. Radiologic examination reveals severe osteoporosis of the vertebral column, with com- pression fractures to vertebrae L4 and L5. Which of the following parts of the vertebrae are most likely to be fractured in this patient?
A. Spinous process B. Vertebral bodies C. Transverse process D. Superior articular process E. Intervertebral disc
B. Vertebral bodies
A 45-year-old man is admitted to the hospital because of severe pain in the back and lower limb. Radiologic examination reveals spinal canal stenosis syndrome. Which of the following conditions is most likely to be confirmed by a magnetic resonance imaging (MRI) examination?
A. Hypertrophy of supraspinous ligament B. Hypertrophy of interspinous ligament C. Hypertrophy of ligamentum flavum D. Hypertrophy of anterior longitudinal ligament E. Hypertrophy of nuchal ligament
C. Hypertrophy of ligamentum flavum
A 35-year-old man is admitted to the hospital after a severe car crash. Radiologic examination reveals an injury to the dorsal surface of the neck and a fracture of the medial border of the right scapula. During physi- cal examination, the patient presents with the scapula retracted laterally on the affected side. Which of the following nerves has most likely been injured on that side?
A. Axillary B. Long thoracic C. Dorsal scapular D. Greater occipital E. Suprascapular
C. Dorsal scapular
A 64-year-old man arrived at the clinic with a painful rash and skin eruptions that are localized entirely on one side of his body, closely following the dermatome level of the spinal nerve C7. The patient was diagnosed with the a herpes zoster virus infection known as “shingles.” In what structure has the virus most likely proliferated to cause the patient’s current condition?
A. The sympathetic chain
B. The dorsal root ganglion of the C7 spinal nerve
C. The lateral horn of the C7 spinal cord segment
D. The posterior cutaneous branch of the dorsal primary ramus of C7
E. The ventral horn of the C7 spinal cord segment
B. The dorsal root ganglion of the C7 spinal nerve
A 45-year-old woman states that she has experi- enced moderate pain for 2 years over her left lower back; pain that radiates to her left lower limb. She states that after lifting a case of soft drinks, the pain suddenly became intense. She was admitted to the emergency department. Radiologic examination re- vealed intervertebral disc herniation between vertebral levels L4 and L5. Which of the following nerves was most likely affected by the disc herniation?
A. L1 B. L2 C. L3 D. L4 E. L5
E. L5
A 3-year-old boy is brought by his mother to the emergency department with severe headache, high fever, malaise, and confusion. Radiologic and physical examinations reveal that the patient suffers from men- ingitis. A lumbar puncture is ordered to confirm the diagnosis. Which vertebral level is the most appropriate location for the lumbar puncture?
A. T12 to L1 B. L1 to L2 C. L2 to L3 D. L4 to L5 E. L5 to S1
D. L4 to L5
When a lumbar puncture is performed to sample cerebrospinal fluid, which of the following external landmarks is the most reliable to determine the position of the L4 vertebral spine?
A. The inferior angles of the scapulae B. The highest points of the iliac crests C. The lowest pair of ribs bilaterally D. The sacral hiatus E. The posterior inferior iliac spines
B. The highest points of the iliac crests
A 39-year-old man presents with severe neck pain after a whiplash injury, sustained when his car was struck from behind. Radiologic studies reveal trauma to the ligament lying on the anterior surface of the cervical vertebral bodies. Which ligament is most likely disrupted?
A. Anterior longitudinal ligament B. Ligamentum flavum C. Nuchal ligament D. Posterior longitudinal ligament E. Transverse cervical ligament
A. Anterior longitudinal ligament
A 65-year-old man complains of severe back pain and the inability to move his left lower limb. Radiologic studies demonstrate compression of nerve elements at the intervertebral foramen between vertebrae L5 and S1. Which structure is most likely responsible for this space-occupying lesion?
A. Anulus fibrosus B. Nucleus pulposus C. Posterior longitudinal ligament D. Anterior longitudinal ligament E. Ligamentum flavum
B. Nucleus pulposus
A 27-year-old man is admitted to the emergency department after a car crash. Physical examination reveals weakness during medial rotation and adduction of the humerus. Which of the following nerves was most probably injured?
A. Thoracodorsal B. Axillary C. Dorsal scapular D. Spinal accessory E. Radial
A. Thoracodorsal
A 39-year-old woman complains of an inability to reach the top of her head to brush her hair with her right hand. History reveals that she had undergone a mastectomy procedure of her right breast 2 months earlier. Physical examination demonstrates winging of her right scapula. Which nerves were most likely damaged during surgery?
A. Axillary B. Spinal accessory C. Long thoracic D. Dorsal scapular E. Thoracodorsal
C. Long thoracic
A 19-year-old man is brought to the emergency department after dislocating his shoulder while playing football. Following treatment of the dislocation, he cannot initiate abduction of his arm. An MRI of the affected shoulder shows a torn muscle. Which muscle was most likely damaged by the injury?
A. Coracobrachialis B. Long head of the triceps brachii C. Pectoralis minor D. Supraspinatus E. Teres major
D. Supraspinatus
A 1-year-old girl is brought to the clinic for a routine checkup. The child appears normal except for a dimpling of the skin in the midline of the lumbar region with a tuft of hair growing over the dimple. What is this relatively common condition that results from incomplete embryologic development?
A. Meningomyelocele B. Meningocele C. Spina bifida occulta D. Spina bifida cystica E. Rachischisis
C. Spina bifida occulta
A young resident complains of an itch on his back that appears to be caused by an insect bite. Which nerve fibers carry the sensation of a mosquito bite on the back, just lateral to the spinous process of the T4 vertebra?
A. Somatic afferent B. Somatic efferent C. Visceral afferent D. Visceral efferent E. Somatic efferent and visceral afferent
A. Somatic afferent
A 15-year-old woman was suspected of having meningitis. To obtain a sample of cerebrospinal fluid by spinal tap in the lumbar region (lumbar puncture), the tip of the needle must be placed in which of the following locations?
A. In the epidural space
B. Between anterior and posterior longitudinal ligaments
C. Superficial to the ligamentum flavum
D. Between arachnoid mater and dura mater
E. In the subarachnoid space
E. In the subarachnoid space
A 19-year-old man is diagnosed with a herniated disc but he has no symptoms of spinal cord injury. In the event of intervertebral disc herniation in the cervi- cal region, which of the following ligaments is in an anatomic position to protect the spinal cord from direct compression?
A. Supraspinous B. Posterior longitudinal C. Anterior longitudinal D. Ligamentum flavum E. Nuchal ligament
B. Posterior longitudinal
In spinal anesthesia, the needle is often inserted between the spinous processes of the L4 and L5 verte- brae to ensure that the spinal cord is not injured. This level is safe because in the adult the spinal cord usually terminates at the disc between which of the following vertebral levels?
A. T11 and T12 B. T12 and L1 C. L1 and L2 D. L2 and L3 E. L3 and L4
C. L1 and L2
A 22-year-old woman is diagnosed with Ray- naud’s disease. In such a case, the patient suffers chronic vasospasm in response to cold. This can lead to arterial constriction and painful ischemia, especially in the fingers or toes. Relief from the symptoms in the hands would require surgical division of which of the following neural elements?
A. Lower cervical and upper thoracic sympathetic fibers
B. Lower cervical and upper thoracic ventral roots
C. Lower cervical and upper thoracic dorsal roots
D. Lower cervical and upper thoracic spinal nerves
E. Bilateral spinal accessory nerves
A. Lower cervical and upper thoracic sympathetic fibers
A 69-year-old woman visits her physician due to severe neck pain. Radiologic studies reveal bony growths (osteophytes) in the intervertebral foramen between vertebrae C2 and C3. Which of the following muscles would be most likely affected by this condition?
A. Rhomboideus major B. Serratus anterior C. Supraspinatus D. Diaphragm E. Latissimus dorsi
D. Diaphragm