Just posterior to the olfactory lobes is the cerebrum (B), and it is the frog's thinking center. The cerebrum helps the frog respond to its environment. Posterior to the cerebrum are the optic lobes (C), which function in vision.The ridge just behind the optic lobes is the cerebellum (D), it is used to coordinate the frog s muscles and maintain balance.ISSECTING THE FROG 1. Place the frog on its dorsal side and secure it in place with dissecting pins through each of the legs. 2. With your scissors make a cut (through the skin only) along the midline of the belly from the pelvis to the throat. 3.