thalamus
reticular activating system
The brain is responsible for all cognitive functions in the grasshopper. This is how the grasshopper makes decisions and reacts to stimuli.
This is not an opinion question; it is a question of brain physiology. We do not respond to every impulse because if we did, our brains would be overwhelmed with sorting and responding to everything, and this includes internal stimuli. Our hearts beat, we breathe, our digestive systems function automatically from the brain stem so we don't have to think about it. The same is true for external stimuli; many register on the brain only briefly, some not at all, because the brain cannot possibly take in and filter hundreds of thousands of stimuli per minute. Our brains filter the stimuli in subconscious areas and only those which are deemed worth our attention make it to the conscious areas of the cerebral cortex.
The brain processes sensory stimuli.
The reticular formation is a part of the brain that is involved in actions such as awaking/sleeping cycle, and filtering incoming stimuli to discriminate irrelevant background stimuli. It is essential for governing some of the basic functions of higher organisms, and is one of the phylogenetically oldest portions of the brain.
It is the communication and coordination system of the body:It receives messages from stimuli all over the body.The brain interprets the message.The brain responds to the message and carries out an activity.
Thalamus
If your body does not receive environmental stimuli, then the brain may no longer concentrate on normal cognitive functions and will to a degree shut down - basically, it goes on stand-by mode until something good happens. Interestingly and to contrast if the brain is exposed to excessive stimuli (sensory overload) or to repetitive stimuli (repeated flashes of light for example) it will also shutdown.
i know how pick me, me, me
Brain is likened to a telephone switchboard because brain is connected to series of network that accept messages from various stimuli, after accepting the stimuli, the brain will send reflexes in accordance with the messages sent.
latent inhibition
cortices
it dies