ABSTRACT
Neurons are like other cells in many ways: They have a nucleus, mitochondria, and organelles all contained in a cell membrane. Neurons also have some unique properties. They do not change from experiences in the same ways that other cells do, which age, strengthen, weaken, etc. Neurons do not divide, and they rarely are replaced by fresh neurons if they die. When things get too hot, the occupants will need to stop the flow of fuel into the system. The feedback loop is achieved by adding two important components and some conduits to connect them at the right places in the system. Feedforward mechanisms are common in biological systems. The field of cognitive neuroscience investigates and theorizes about the biological basis of cognition using evidence from neurobiology and brain imaging, behavioral research, and computational modeling. An example activity-independent process observed at birth is one that connects neural activity in the retina to activity of other brain regions.
