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To truly determine if birds can sleep in flight, recordings of brain activity must take place during flight instead of after landing. A method of recording brain activity in pigeons during flight has recently proven promising in that it could obtain an EEG of each hemisphere but for relatively short periods of time. Coupled with simulated wind ...
"Is the glass half empty or half full?", and other similar expressions such as the adjectives glass-half-full or glass-half-empty, are idioms which contrast an optimistic and pessimistic outlook on a specific situation or on the world at large. [1] "Half full" means optimistic and "half empty" means pessimistic.
Half a glass of water, illustration of two different mental attitudes, optimism (half full) and pessimism (half empty). Optimism is an attitude reflecting a belief or hope that the outcome of some specific endeavor, or outcomes in general, will be positive, favorable, and desirable.
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Image credits: musclesbear 40% of adults reported feeling a lot of worry; 30% reported physical pain; 26% said they were sad, and 22% were angry. But the positive metrics were higher.
Essentially, the fissure's purpose is to separate the brain into two hemispheres, left and right. Through case studies of brain damage or stroke to either side of each hemisphere, there is evidence that the left side of the brain controls the right side of the body, and the right side controlling the left side of the body. [14]
The brain can thus be described as being divided into left and right cerebral hemispheres. Each of these hemispheres has an outer layer of grey matter, the cerebral cortex, that is supported by an inner layer of white matter. In eutherian (placental) mammals, the hemispheres are linked by the corpus callosum, a very large bundle of nerve fibers.