Word: stimuli
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...unresponsive and your eyes are closed.) Because the sleep-wake cycle and certain eye movements are not controlled by the cortex or the thalamus, they can continue without conscious awareness. Even acts of crying and smiling may be reflexive events that do not occur in response to specific stimuli...
...Chesire, a neurologist from the Mayo Clinic in Jacksonville, and renowned neurologist Dr. William Hammesfahr, have suggested that she is definitely not. Even a doctor appointed by Michael Schiavo to investigate his wife’s health has admitted his surprise at her awareness level. She responds to stimuli and can breathe on her own, pump her own blood, and even swallow. Perhaps her PVS diagnosis on the part of other doctors has been the consequence of a lack of any better condition of which to describe her. Either way, there are serious doubts as to whether Terri Schiavo...
...technique—called two-photon calcium imaging in vivo—was applied to the part of the brain where neural input from the eye is translated into images we see. When the animals, cats, and rats were subjected to visual stimuli of moving black and white stripes, the technique recorded images of hundreds of nerve cells firing simultaneously...
...order to capture cells responses to the visual stimuli, the researchers injected clusters of cells with a substance that glows when calcium levels rise, a sign of firing neurons. Then, using a sophisticated microscope, the researchers produced time-lapse images, or successive photographs, which showed alternating groups of cells glowing: multiple clusters of firing neurons...
...method is a combination of several previously discovered techniques, including work done by Hubel and Torsten Wiesel, who won a Nobel prize for their work. Their experiments revealed that different neurons in the visual cortex respond to different stimuli...