Psychology 2221B Chapter Notes - Chapter 5: Frontal Lobe, Standardized Test, Semipermeable Membrane

• School: Western University
• Department: Psychology
• Course: Psychology 2221B
• Professor: Shelley Cross- Mellor

Document Summary

Part 1- methods of studying the nervous system: Contrast x-rays: contrast x-ray techniques involve injecting into one compartment of the body a substance that absorbs x-rays less/ more than surrounding tissue. Magnetic resonance imaging: mri- high-resolution images constructed from measurement waves the hydrogen atoms emit when activated by radio-frequency waves in magnetic field, clearer image ct, relatively high spatial resolution (difs spatial location), mri can produce 3d images. Image levels radioactivity (color coding) various parts horizontal level of brain: colored map amount radioactivity each tiny cubic voxels (volume pixels) compose scan how each voxel maps onto particular brain structure can be estimated superimposing scan brain image. Identifying distribution brain molecules of interest, accomplished injecting volunteers radioactive ligands (ions/molecules bind other molecules under investigation: document distribution radioactivity in brain. Images representing increase in oxygen flow in blood to active areas of brain: active areas brain take up more oxygenated blood than need for their energy requirements.