Basically any animal with bilateral symmetry has a “bilateral brain”. It comes with the centralized nervous system, everything (eyes, major ganglia, etc) comes in pairs. All worms, insects, mollusks and every vertebrate has a bilateral brain. I say this from the point of view of an evolutionary biologist, not a neuroscientist.
If you’re wondering about different “specialization” of one brain half vs another, I’m not sure. However, brains have been separated into 2 bilateral parts since a common ancestor over 500 million years ago.
frank_my_underwood t1_j5izjof wrote
Reply to bi-lateralization of the brain in animals? by mairaliseth
Basically any animal with bilateral symmetry has a “bilateral brain”. It comes with the centralized nervous system, everything (eyes, major ganglia, etc) comes in pairs. All worms, insects, mollusks and every vertebrate has a bilateral brain. I say this from the point of view of an evolutionary biologist, not a neuroscientist.
If you’re wondering about different “specialization” of one brain half vs another, I’m not sure. However, brains have been separated into 2 bilateral parts since a common ancestor over 500 million years ago.