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Neurosciences- Anatomy and functions of the nervous system.docx

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Kenneth Campbell

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Psychology Lecture 6 9/25/2012 7:43:00 AM Orientation  Medial-lateral Slices  Horizontal  Coronal  Sagittal Imaging Techniques  Anatomical techniques o Slicing the human brain. o Viewing macrostructures with the human eye or microstructures with a microscope. o Appropriate for cadavers. MRI (Magnetic Resonance Imaging)  Advantage: Provides high resolution images of the human brain.  Problems: o Static. Provides an image of the structure but does not indicate the function of the structure. o Resolution is limited (cannot see single cells) o Very expensive Functional Techniques (observing the active brain)  What areas of the brains are responsible for different animal and human functions?  In the clinical setting: Observe functions lost because of brain injury (trauma, stroke, tumours, etc).  Problem: human brain injures are often widespread and not higly specific.  In the experimental setting: Lesion a specific part of animal brains to determine its function.  Stimulate a specific area of the brain to observe the function it controls.  Problems: in many cases, it is difficult to know just what an animal is experiencing.  Higher mental states may well differ across species. How applicable are these studies to humans? PET (Positron Emission Tomography)  Advantage: provides an image of the function of various
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