PSY 105 Lecture Notes - Lecture 3: Functional Magnetic Resonance Imaging, Ct Scan, Myelin
Document Summary
Structural neuroimaging techniques use advanced technology to create images of the living, healthy brain. Computerized axial tomography (ct or cat) scan. Functional brain imaging techniques allow us to watch the brain in action. Positron emission tomography (pet) - required radiation injection. Neurons: cells in the nervous system that communicate with one another to perform information-processing tasks. About 100 billion neurons in the brain. Oligodendroglia provide myelin to speed up transmission of neurons. Microglia clean up dead cells and prevents infection in the brain. Astroglia - created a blood- brain barrier that monitors the passage of molecules from blood to the brain also, absorbs and cleans up chemicals released by other neurons. Neurons vary in size and shape, depending on their location and function. Cell body contains nucleus, which provides energy for the neuron. Axon carries information away from the cell body (impulses are carried away from the cell body) Axon terminals transmit signals to other neurons.
