Psychology 100 Test Review

Lots of research forms an put together biopsychosocial approach which realizes the biological, psychological, and sociocultural factors

In both X-rays and CT scans, a form of radiation is emitted and travels through the body, and a detector receives the unabsorbed rays and transmits them to a computer. The physics behind PET scanning is quite different. Basically, a person is injected with a radioactive substance. This substance begins the process of

The brain can be considered the most complex organ in the body and the centrepiece of the nervous system. Although the brain works as a unified whole, neuroscientists have identified areas within it that perform specific functions. This makes the brain interconnected by three different layers: the central core, the limbic system, and the cerebral cortex. All of which contain structures that regulate everyday life and psychological function.

A hypothesis is an explanation that can be tested based on observation. A statistical hypothesis is testable explanation based on observation and different variables. A null hypothesis explains what the results of the experiment will be if the original hypothesis is wrong. An alternate hypothesis is the opposite result if there is or isn’t a null hypothesis. Semmelweis hypothesized that bacteria/virus filled extremities resulted in higher death rates.

Using Functional MRI helps to visualize the brain functionality through local metabolism. In this technology it allows the researcher to measure and track the brain functions by discovering the correlated changes in blood flow. From this functional Mri when a brain function is acted out the flow of oxygenated rich blood is detected and highlighted on the specific location where the functionality came from on the brain.

The PET scan also will show two and three-dimensional images of the brain; however, the PET scan measures brain activity. This is done by injecting radioactive isotopes into the blood stream. The isotopes attach to

Heyman states, “In a most impressive display of brain technology, scientists have used scanning technologies to observe metabolic activity of the brain in action. In a typical

When a patient goes in for an EEG, the location the electrode will be place on is cleaned and hair is parted. The number of electrodes placed on the scalp is normally between 12 and 20 depending on the purpose of the EGG. PET - Define: According to Brian Krans of Healthline, PET scans, or Positron Emission Tomography, are a type of imaging technique that uses radioactive tracer dye to analyze different organ function. The dye is injected via a vain in the arm and absorbs into organs and upon scanning, a doctor can see how well that organ is working.

Magnetic resonance imaging (MRI) - This technique uses a magnetic field and radio waves to create detailed images in cross section of the brain. The MRI machine allows producing 3-D images that can be viewed from different angles.

In past experiments the researcher would have been required to scan images of the entire brain for each comparison,

Once in the synapses, the impulses triggers the release of chemical messages called neurotransmitters; which then bind to receptors on the receiving cell as the transmission of the impulse repeated again. The message or impulse continues traveling from one neuron to the next throughout the body until it reaches its destination as it relays a signal. All of this activity happens in less than a split second and without conscious thought. At the end of this process, the brain has the task of interpreting the message and making the decision as to what to do with this new information. (Carlson, 2011.Pg.45-52)

Magnetoencephalography (or MEG for short) is way to measure brain activity. It shows what parts of your brain are being used. MEG is one of the only tests that show direct brain function. Other tests including PET scans can only use evidence such as brain metabolism to record brain activity. MEG scanning is very safe and is an easily repeated test that has no long-term health implications. MEG scanning also has the advantages of giving a very clear image that is not distorted due to measurement through the skull. This is because MEG scanners contain a huge number of sensors.

Fused PET/CT is a recently developed technology that couples the functional information of PET with the anatomic details of CT (8).

2. Functional brain mapping (scanning a person's brain while he or she is performing a certain physical task such as squeezing a ball, or looking at a particular type of picture) is helping researchers better understand how the brain works.

An MRI (magnetic resonance imaging) is a scan that uses a system of techniques, involving magnetism, radio waves and a computer to generate detailed images of the human body. Essentially, it is a tube encased by a large circular magnet. The patient would be placed on a moveable bed, which is then inserted into the tube. The magnet then creates a strong magnetic field that aligns the protons of hydrogen atoms. These hydrogen atoms come from the human body, which is 50-65% H2O. These atoms are exposed to a beam of radio waves. This spins the various protons of the body. As they spin, they produce a slight