This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'Which is not a medial pathway involved in the maintenance of posture? \nSelect and explain. \nA. Reticulospinal tract, B. Rubrospinal tract, C. Tectospinal tract, D. Vestibulospinal tract', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Rubrospinal tract and lateral corticospinal tract are lateral tracts.\nAnterior corticospinal tract, vestibulospinal tract, reticulospinal tract and tectospinal tract are medial tracts.', 'role': 'assistant'}]