Glossary

face agnosia The inability to recognize and remember faces.

neuronal stem cell A cell with the potential to give rise to all cell types found in the brain.

progenitor cell A cell with restricted potential to give rise to some cell types of the brain, e.g., astrocytes and oligodendrocytes.

prosopagnosia The inability to recognize and remember faces.

During the past century, neuroscientific research has generated a tremendous amount of knowledge on the function of the brain, but despite a substantial effort we still lack knowledge in such important areas as storage mechanisms for long-term memory, mechanisms responsible for higher intellectual functions such as reasoning, and decision-making processes based on judgment. There are, however, some areas in which it has been possible to localize behavior to small groups of neurons or even single nerve cells. Only a few mechanisms rely on spatially closely located neurons in the brain. Instead, many systems, such as the storage of long-term memories, seem to rely on diffuse, spatially nonlocalized circuitry throughout the brain. This article will focus on some examples for which the relationship between nerve cells and behavior has been partially unraveled.

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