This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
Joint position sense in the left lower limb is impaired in all except 
Select and explain. 
A. Left dorsal column lesion in the thoracic region, B. Left cerebellar lesion, C. Left thalamic lesion, D. Right lenticulostriate artery thrombosis
C: Left thalamic lesion
Answer: C: Left thalamic lesion 
Explanation: (C) Left thalamic lesion Harrison17 - 155; Harrison18 - 187,189,190; Harrison16 - 143]# ASCENDING TRACTS carrying sensory information from peripheral receptors to the cerebral cortex, (a) Dorsal-column pathway mediating touch, vibratory sense, and proprioception, (b) Ventrolateral spinothalamic tract mediating pain and temperature.