Quote:
|
The nervous system of a crab differs from that of vertebrates (mammals, birds, fish, etc.) in that it has a dorsal ganglion (brain) and a ventral ganglion. The two nervous centers are connected by a circumesophageal ganglion, i.e., it circles the esophagus. The dorsal brain is located between the eyes and near the anterior end. The ventral ganglion is located beneath the internal organs, between the legs. The brain is tiny, smaller than the point of a pencil, while the ventral ganglion is huge by comparison. The ventral ganglion provides nerves to each walking leg and all of their sensory organs, while the brain processes sensory input from the eyes.
|
Those legs are separated from both "brains" when using this method.
Besides, I'm not even remotely convinced that we are talking about conscious thought with the crab "feeling" some sort of horrible "pain" as much as a nervous system reaction to stimulus.