Neurons Show Why Learning's Tougher as We Age, Carl Zeiss Meditec Inc. Study

he behavior of inhibitory neurons suggests why learning is easier for the young and more difficult for the old. The brain is made up of two types of cells—inhibitory and excitatory neurons. Networks of these two kinds of neurons are responsible for processing sensory information like images, sounds, and smells, and for cognitive functioning. About 80 percent of neurons are excitatory. Traditional scientific tools only allowed scientists to study the excitatory neurons.

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