The brain on invertebrates

The category of invertebrates includes arthropods, molluscs and a very large number of types of worms. The difference in the invertebrates bodies it is matched by an equal diversity in all the brain structure.

There are two groups of invertebrates that notably have complex brains and these are the arthropods and that on this group there are insects, crustaceans, arachnids and some others and the other group of this are the cephalopods that is conformed by octopuses, squids and very similar mollusks. The brains of these two types of groups are arise from twin parallel nerve cords and this nerve cords extend all through the body of the animal.

The ones that have a central brain are the arthropods this ones with three divisions and a very large lobes behind each eye these ones for the visual processing.

Octopus and squid are cephalopods and these animals have the largest brains of any invertebrates.

There are many invertebrate animals that their brains have been studied very intensively because this animals have properties that make convenient for the experimental work such animals as:

·         FRUIT FLIES:  as we know now in times are many techniques available for the study of their genetics, this have been a very natural subject to study the genes in the brain development. Thanks to the large evolutionary distance between the insects and the mammals, many aspects of the drosophila neurogenetics have been showing a out to be relevant in many ways to humans. One search that they made on the genomes of invertebrates turned up a being a set of analogous gene, and this also it was founded to play similar roles in the biological clock of the mouse and also almost certainly in the biological human clock as well.