A patient presents with a pinpoint pupil that does not dilate, when the lighting changes. Where was the central nervous system damaged?

Answer options

1. Pes pedunculi at the level of the inferior colliculi in the midbrain tectum
2. Cerebral peduncles at the level of the superior colliculi in the midbrain tectu
3. Superior colliculi in the midbrain tectum
4. Lateral geniculate body in the diencephalon
5. Lateral horn of the spinal cord's gray matter at the level of C8-Th1