Chap 7 Flashcards
Describe an EEG
- measures the electric energy in the brain by looking at the graded potentials of our neurons, these signals demonstrate different behaviors and can be used to study stages of consciousness
What is coherence theory
single-cell activity to EEG activity are not distinct, but are one a continuum from high to low coherence
What is deep brain stimulation
- electrodes are implanted in the brain to stimulate a target area that facilitates behavior
- this can be used to treat OCD, depression or epilepsy
What are 4 methods of static brain imaging ?
- Pneumoencephalography
- X-ray
- CT
- Angiography
What is an advantage + limitation to a pneumoencephalography
A: has a diagnostic advantage to x-rays
L: Too inverse and painful
What is an advantage + limitation to a X-rays
A: Useful to look at fractures and brain abnormalities
L: risk of radiation exposure
What is an advantage + limitation to a CT scan
A: creates a 3D image of the brain that can detect tumors or lesions
D: must inject dye, which can pose issues
What is an advantage + limitation to an angiography
A: shows the various blood vessels within the brain
L: can be dangerous and painful since they have to inject a substance to absorb x-rays
What are 4 methods of dynamic imaging ?
- PET scan
- MRI
- fMRI
- fNIRS
What is an advantage + limitation to a PET scan
A: Detects hundreds or metabolic chemicals
L: lower image resolution than an fMRI
What is an advantage + limitation to a MRI
A: Non-invasive and safe
L: not practical with children, they must remain still for prolonged time
What is an advantage + limitation to an fMRI
A: Looks at functional anatomy
L: limited to blood flow
What is an advantage + limitation to the fNRIS
A: non-invasive, low cost, better localization than EEG’s
L: limited to cortical activity (does not penetrate deep into the brain structures)
