Cells & Circuits

Your selections: Cells and Circuits
From the stands at sports events, we marvel at the actions of athletes. But in fact, each of us in our daily activities performs a host of complex, skilled movements that are just as remarkable.
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Our best insights into how the normal brain ages come from long-term studies of the nervous system that began decades ago.
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Touch is the sense by which we determine the characteristics of objects: size, shape, and texture.
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Whether cancerous or not, brain tumors are serious because they can interfere with normal brain function.
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Although most of us don’t think of it in this way, the related senses of taste and smell help us interpret the chemical world.
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Why do we get sleepy? There are two main determining factors: the circadian system (time of day or night) and how long we have been awake.
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Studies of the body’s own pain-control system demonstrated the existence of naturally occurring opioids — the endorphins.
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Medical science offers us a number of different ways to dull or treat pain.
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Processing information from the sensory systems is one of many functions of the brain. Such information is often the first step in other brain activities, including learning and retaining knowledge.
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To be able to see anything, eyes first need to process light. Vision begins with light passing through the cornea.
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The moment light meets the retina, the process of sight begins. About 60 years ago, scientists discovered that each vision cell’s receptive field is activated when light hits a tiny region in the center of the field and inhibited when light hits the area surrounding the center.
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In response to signals from a brain region called the hypothalamus, the adrenal glands secrete glucocorticoids, hormones that produce an array of effects in response to stress.
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3D Brain

An interactive brain map that you can rotate in a three-dimensional space.