NROSCI 1000 Lecture Notes - Lecture 1: Positron Emission Tomography, Golgi'S Method, Radioactive Tracer
Document Summary
The person who figured out the corrrelation between injury to brain and change in personality. Localism (specificty): specific locations in the brain are responsible for individual functions. Holism the brain works as a whole. Positrons are released, collide with electrons and produce photons which is what is displayed in the picture. Mri: h in tissue are aligned in magentic field, then perturbed with radiowaves to produce another magnetic field. Fmri: measurable in metabolic activity; ration of oxygenated to deoxygenated hemoglobin. Galen: nerves conveyed fluid from brain to spinal cord. Until 1900s, nervous system thought to be a continuous nerve net (synsectium) Reticular theoury: nerves communicate through a nerve net. Golgi: reticular theoury: nerves communicate through a nerve net. Gogli stain silver stain on neuronal tissue stains full entire cells. Used golgi stain and came to opposite conclusion. Contributed to neuron doctrine and principle of dynamic polarity. Neuron doctrine: individual neurons are the units and signaling elements of the neuvous sustem.
