- Sep 2023
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socialsci.libretexts.org socialsci.libretexts.org
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rawbacks of MRI scans include their much higher cost, and patient discomfort with the procedure. The MRI scanner subjects the patient to such powerful electromagnets that the scan room must be shielded. The patient must be enclosed in a metal tube-like device for the duration of the scan, sometimes as long as thirty minutes, which can be uncomfortable and impractical for ill patients
Advantages- can discover tumors, no radiation exposure disadvantages- noisy, uncomfortable, long process, can't be used if patient has a iron- containing metallic implant.
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In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device, which was in use clinically by the early 1980s.
It was and still is revolutionary technology, it's incredible to think of how someone invented it.
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however, X-rays are capable of damaging cells and initiating changes that can lead to cancer. This danger of excessive exposure to X-rays was not fully appreciated for many years after their widespread use
I always feel uneasy getting x-rays for this reason
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socialsci.libretexts.org socialsci.libretexts.org
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Functional imaging techniques allow researchers to learn about the brain activity during various tasks by creating images based on the electrical activity or the absorption of various substances that occurs while a subject is engaging in a task.
Most of the MRI scan's i've seen have been taken while the subject performs a task.
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socialsci.libretexts.org socialsci.libretexts.org
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As a result of this personality change, he was fired and could no longer hold a steady job
I wonder if he realized himself that his personality had changed?
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socialsci.libretexts.org socialsci.libretexts.org
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each one filled with a chemical solution that allowed the hearts to continue to beat.
How interesting. I've never heard of a chemical solution that allows hearts to still beat after being removed.
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ocrates (460-377 B.C.E.) , who believed that it was the brain and not the heart where the locus of the mind resided. He wrote: "It ought to be generally known that the source of our pleasure, merriment, laughter, and amusement, as of our grief, pain, anxiety, and tears is none other than the brain. It is specially the organ which enables us to think, see, and hear......It is the brain too which is the seat of madness and delirium, of the fears and fright
It's incredible how these early philosophers were so ahead of their time.
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believed that one's mind resided in the heart
I love this theory, even though it's not 100% accurate. It's interesting to consider what their perception of the mind was and how they interpreted emotions in 300 B.C.E.
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socialsci.libretexts.org socialsci.libretexts.org
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Free will vs. determinism is an issue that is far from being resolved and remains controversial even among scientists, including biological psychologists.
Free will vs. determinism has always been an interest of mine however i've never been able to reach a conclusion on my standpoint. Whenever I think i've decided which side i'm on, I overthink it and then I'm back to square one.
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Because all behavior is controlled by the central nervous system (brain and spinal cord), biopsychologists seek to understand how the brain functions in order to understand behavior and mental activitie
Biopsychology is arguably one of the most important fields in psychology because it focuses primarily on the brain itself which is where mental illnesses and other issues relating to psychology originate from.
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