pineal gland,optic tectum,mesencephalic artery,mesencephalic vein,ventral tegmentum,dorsal tegmentum,midbrain tegmentum,oculomotor motornucleus,trochlear motornucleus,anterior tectum,posterior tectum,anterodorsal tegmental nucleus,anteroventral tegmental nucleus,laterodorsal tegmental nucleus,posterior commissure,posterodorsal tegmental nucleus,posteroventral tegmental nucleus,torus semicircularis,ventricular layer of the optic tectum,neuropil of the optic tectum,cell body layer of the optic tectum,radial glial cell,anterior tectum,cell body layer of the optic tectum,neuropil of the optic tectum,posterior tectum,radial glial cell,ventricular layer of the optic tectum,Stirnorgan,optic tectum