Neuro A&P- cranial imaging techniques

Question 1

MRI

Magnetic Resonance Imaging

Answer 1

Very strong magnets align the nuclei of atoms of the body and the results can be analyzed by 2 or 3-dimensional images.
Best for soft tissue.
Can see down to 1mm resolution.

Question 2

fMRI

functional Magnetic Resonance Imaging

Answer 2

Measures blood flow to tissue. Blood flow means an increased metabolic activity which means function.

Question 3

CAT

Computer Aided Tomography

Answer 3

Uses a low dose of irradiation to create 3-dimensional images of tissue.
Most helpful for cerebrovascular supply, hemorrhage, ischemia, and seeing tumors.

Question 4

SPECT

Single Photon Emission Computed Tomography

Answer 4

variation of CT scans

Question 5

MEG

Magnetoencephalography

Answer 5

Measures the magnetic fields generated by the brain and has an excellent temporal resolution.

Question 6

EEG

Electroencephalography

Answer 6

Measures brain wave activity over the scalp revealing frequencies of activity at a significant distance from the generator source.

Question 7

ABR

Auditory Brain Stem Responses

Answer 7

The EEG in relation to an auditory stimulus.

Question 8

ERP

Event Related Potentials

Answer 8

A record of cortical activity using a large array of electrodes to define the neural generator.

Question 9

iEEG

Intracranial EEG

Answer 9

When the electrodes remain in place on the surface of the temporal lobe for many days while awaiting the onset of seizure activity.

Question 10

PET

Positron Emission Tomography

Answer 10

Reveals blood flow using ionizing radiation to label neurotransmitters and observe active sites.