Physicists Negate Century-Old Assumption Regarding Neurons and Brain Activity

Neurons are the basic computational building blocks that compose our brain. Their number is approximately one Tera (trillion), similar to Tera-bits in midsize hard discs. According to the neuronal computational scheme, which has been used for over a century, each neuron functions as a centralized excitable element. The neuron accumulates its incoming electrical signals from connecting neurons through several terminals, and generates a short electrical pulse, known as a spike, when its threshold is reached.

Anxious? Cellular roots of anxiety identified

Research from Washington University School of Medicine in St. Louis sheds light on what might be happening in an anxious brain. A new study has identified a group of neurons that become active when an animal is faced with the possibility of an unpleasant event.