Introduction to Clinical Neuroscience Flashcards
What lobe is the most developed in humans?
β The frontal lobe
What is the dura and what does it contain?
β the βbagβ that surrounds the brain
β contains CSF that surrounds the brain
What is the function of the dura?
β Cushions the brain from impact
How much energy does the brain use?
β 20-30% of the energy
What makes up grey matter?
β astrocytes
β Neurons
β glia
What are the connections between grey matter?
β white matter
What do dendrites do?
β They receive signals from other neurons and get processed by the cell body and the signal is transmitted to other cells
What happens when the frontal lobe is damaged and give an example?
β Phineas Gage
β Personality changes
β irreverent, impatient
What is Alzheimers?
β Deposition of proteins that damage the brain
What do products of blood breakdown show up as on an X-Ray?
β Bright marks
What creates MRI images?
β magnets within us
How does NMR work?
β Hydrogen atoms have protons
β Nucleus spins and acts like a small magnet
β A radiofrequency pulse is given out which interacts with all the protons
β Protons spin and generate a signal
What is isotropic diffusion?
β the same diffusion in all directions
What is anisotropic diffusion?
β Strong lateral diffusion but perpendicularly weak
How can water move in white matter tracts?
β it can diffuse easily
β restricted from moving side to side