The fact that they do not lead to the same cortical areas and systems is alone one reason for this.

A cortical area is a part of the cerebral cortex.

However, the cortical areas involved, and the strength of their relative projections differs across species.

The connections of cortical areas may give some clues about homology.

Without such models it has been difficult to determine what the properties of these cortical areas should be.

Patients were found to have damage present in the mid-brain area and associated cortical areas.

However, stimulation experiments in animals indicate that other cortical areas also affect the process.

One of the functions is as the "gustatory cortical area".

Each cultural tool should be associated with specific cortical areas, consistent across individuals and cultures.

Whether these cortical areas are arranged in a hierarchy or share some other more complex relationship is still debated.