Q. A 60 year-old male presents to clinic for bilateral hand and feet pain. He characterizes the pain as a burning sensation located that the palms of his hands and soles of his feet. He has difficulties with fine motor tasks and is unable to stand on his feet for long periods of time due to the pain. She has a medical history of diabetes. On neurological exam, he has reduced sensation to proprioception and vibration. Pinprick and temperature sensation are intact. He has 5/5 strength in his upper and lower extremities throughout. He reflexes are reduced in all his extremities. His clinical presentation is concerning for a peripheral neuropathy. Which of the following spinal tracts is most likely affected in this patient?