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CSD 350 Exam 2 Review Questions And Accurate Answers Latest Update
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CSD 350 Exam 2 Review Questions And AccurateAnswers Latest Update
What is the Temporal Resolution like for PET? - Answer Low ( >1 cm)
What does PET stand for? - Answer Positron Emission Tomography
What is the Spatial Resolution like for PET? - Answer Low (slow, over seconds)
Is PET invasive? - Answer Not really. However, the patient must be exposed to a
radioactive substance.
What does PET measure? - Answer -PET Measures metabolic processes
-Involves exposure to radiation/radioactive tracers
-The metabolic process of some molecules (radioactive tracers)
What does a PET machine look like? - Answer
What does fMRI stand for? - Answer Functional Magnetic Resonance Imaging
What is the Temporal Resolution like for fMRI? - Answer Low (slow, over many seconds)
What is the Spatial Resolution like for fMRI? - Answer High-can measure 1 mm^3 of brain
tissue at a time
What does BOLD mean? - Answer Blood-Oxygen Level Dependent
,What does an fMRI measure? -Answer: BOLD signal
How does an fMRI measure BOLD signals? -Answer: Oxygenated and deoxygenated
hemoglobin in blood have different magnetic properties
How does the brain's activity alter BOLD signals and allow for fMRI's to be used?
-Answer -When brain tissue is active, blood rushes in. This causes a high BOLD signal.
-When at rest, blood deoxygenates, yielding a low BOLD signal
How can fMRI's be analyzed? - Answer The Contrast Method: Scan brain during two
different conditions and compare activity
What is the Contrast Method? - Answer A way to analyze fMRI's. Measure brain activity
under 2 different conditions, then compare the activity to see where the difference
occurred.
Is fMRI invasive? - Answer No
What does EEG stand for? - Answer Electroencephalography
What is the Spatial Resolution like for EEG? -Answer Low-each EEG electrode on the
scalp measures a wide area
What is the Temporal Resolution like for EEG? -Answer High-millisecond precision
Is EEG invasive? -Answer No
What does EEG look like? -Answer
, What are some of the benefits of an EEG? -Answer "-";
inexpensive
non-invasive
high temporal resolution
How many electrodes does an EEG cap have? -Answer Over 30 electrodes is
considered a lot, but can have 3-250
What does an EEG measure? -Answer An EEG measures electrical potentials at the
scalp, this reflects groups of neurons
How many neurons does an EEG measure from? -Answer A group of many neurons
What can an EEG be used to look at? -Answer -Evoked Potentials (e.g.:Newborn hearing
test)
-Induced EEG (e.g.: Changes to brain activity with a task)-Resting EEG (e.g.: Brain
activity without a task)
How can we analyze EEG? - Answer -Averaged waveform
response-Spectral-Time-frequency-Functional Connectivity
What does fNIRS stand for? - Answer Functional Near Infrared Spectroscopy
What is the Temporal Resolution like for fNIRS? - Answer Low (slow, over many
seconds)
What is the Spatial Resolution like for fNIRS? - Answer Low (each fNIRS sensor
measures a wide area)
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