Review Question - QID 214181

A 61-year-old man presents to his primary care physician with a 3-week history of left arm numbness and weakness. He says that his left arm has been intermittently tingling for several months, but he attributed it to strain and aging. He began to become concerned when he realized that his left arm was significantly weaker than his right arm. He also endorses neck and arm pain over the same time period. On physical exam, he is found to have weakness with elbow extension as well as with wrist flexion. Downward compression of his head when it is rotated and bent to the left side recapitulates the symptoms he experiences. A problem with which of the following intervertebral segments best explains this patient's symptoms?