Semester 1 Module 11 - Bio Methods Flashcards
What is EEG?
Electroencephalography. Records postsynaptic voltage changes.
What are the EEG frequency bands from most to least tight?
Gamma = sensory processing, consciousness Beta = alertness, anxiety, movement preparation Alpha = relaxation, drowsiness, internal attention Theta = memory, language Delta = deep sleep, anaesthesia
What are some clinical applications of EEG?
Epilepsy, and various sleep issues such as narcolepsy and insomnia.
What are some pros and cons of EEG?
Pros- excellent temporal resolution, distinguish timing of different processes, low cost, mostly mobile
Cons- poor spatial resolution, number of individual trials needed for averaging, movement artefacts.
What is PET?
Positron Emission Tomography.
What are some pros and cons of PET?
Pros- widely used in oncology, identify areas of activity with cognitive processes, examination of neurotransmitter systems.
Cons- radiotracer is radioactive, high cost.
What is MRI?
Magnetic Resonance Imaging.
What are some pros and cons of MRI?
Pros- excellent spatial resolution, noninvasive and does not involve radiotracers.
Cons- informs structure not function, lengthy scanning time, expensive, not suitable for young children or people with metal implants.
What is an fMRI?
functional Magnetic Resonance Imaging.
What are some pros and cons of fMRI?
pros- excellent spatial resolution.
cons- poor temporal resolution, concerns over multiple comparisons.
What does an EEG measure?
postsynaptic voltage changes.
What EEG frequency is associated with memory?
Theta.
What did the London Taxi Driver Study find?
That the posterior hippocampus supported spatial navigation.
What does fMRI measure?
blood oxygenation.