See How Refractive Vision Problems Work and How Corrective Lenses Work for details. Astigmatism Astigmatism is an uneven curvature of the cornea and causes a distortion in vision. To correct this, a lens is shaped to correct the unevenness. Why does vision worsen as we age? As we grow olde...
Because the clinical benefits of lesioning target structures such as the thalamus, globus pallidus and subthalamic nucleus appear to be similar to those achieved by chronic application of stimulation at these structures, it has been surmized that deep brain stimulation produces a functional inactivation...
The basiclower brainconsists of thespinal cord,brain stemanddiencephalon(the cerebellum and cortex are also present, but will be discussed in later sections). In turn, the brain stem comprises the medulla, pons, midbrain, hypothalamus and thalamus [source:Health Pages]. ...
How does the olfactory system makes sense of scents? Why doesn't the olfactory system go through thalamus? Why is the olfactory system so sensitive? Why is the olfactory system important? How does atmospheric circulation work? Why is the human olfactory bulb smaller than those found in rodents...
In turn, the brain stem comprises the medulla, pons, midbrain, hypothalamus and thalamus [source: Health Pages]. Within each of these structures are centers of neuronal cell bodies, called nuclei, which are specialized for particular functions (breathing, heart-rate regulation, sleep): Medulla -...
How does deep brain stimulation work? Present understanding and future questions. High-frequency deep brain stimulation (DBS) of the thalamus or basal ganglia represents an effective clinical technique for the treatment of several medica... CC Mcintyre,M Savasta,BL Walter,... - 《Journal of Clini...
Why doesn't the olfactory system go through thalamus? How does ultrasound imaging work? How do seismic dampers work? Why isn't the eardrum flat? How does proprioception help balance? How does the olfactory bulb work? How does the ecosphere work?
Once they reach your brain, several brain regions including the thalamus, brain stem, and parts of the cortex, spring into action to figure out what’s going on and what you need to do. The processes that make you yank your hand back are mainly subconscious, but your conscious mind’s ...
In addition, there is a large mass of neurons beneath the cerebrum, called the thalamus. This small, but critical area relays sensory impulses to the cerebral cortex. For a more detailed explanation of the brain's function, see How Your Brain Works. Scientists believe that consciousness depends...
Still further, believing all our higher powers are in the cortex, scientists have concentrated on the one-way upward course of information from the senses to the reticular formation and thalamus up to the cortex, where they think processing, analysis, and decision-making must take place. But in...