This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuroanatomy, Subject name: Anatomy
Superior colliculus is located at: 
Select and explain. 
A. Midbrain, B. Pons, C. Medulla, D. Spinal cord
A: Midbrain
Answer: A: Midbrain 
Explanation: Ans. A. MidbrainThe midbrain is the smallest segment of the brainstem. It is just superior to the pons and contains the nuclei of the 3rd (oculomotor) and 4th (trochlear) cranial nerves. The midbrain is traversed by the cerebral aqueduct. The part dorsal to the aqueduct is called the tectum and consists of four surface elevations--the corpora quadrigemina (comprising two superior and two inferior colliculi).