This model is part of wider Dichotic theory of salience, according to which a stimulus is salient either when it is incongruent in a certain context to a perceiver's schema, or when it is congruent in a certain context to a perceiver's goal.
âThat first day in the Hayden Planetariumâ¦I looked up, the lights dimmed and stars came out, and I was called by the universe. I had no choice in the matter,â he says. From then on, Neil was determined to become an astrophysicist, someone who studies the stars and universe. He saved up for a telescope and spent his evenings studying the night sky on city rooftops. His stargazing habits were not necessarily well received however, as his neighbors would often report him for suspicious behavior.
Astrocytes are the most numerous cell type within the central nervous system (CNS) and perform a variety of tasks, from axon guidance and synaptic support, to the control of the blood brain barrier and blood flow.To perform these roles, there is a great variety of astrocytes.In this review, we summarize the function of astrocytes, in particular, their role in maintaining homeostasis at the synapse, regulating neuronal signaling, protecting neurons from oxidative damage, and determining the fate of endogenous neural precursors.o perform these roles, there is a great variety of astrocytes. In this review, we summarize the function of astrocytes, in particular, their role in maintaining homeostasis at the synapse, regulating neuronal signaling, protecting neurons from oxidative damage, and determining the fate of endogenous neural precursors.