Recording brain Function

Question 1

Electroencephalograph (EEG)

Answer 1

Records electrical activity of the brain thru electrodes placed on the skull. Electrode cap

Question 2

Magnetoencephalograph (MEG)

Answer 2

Measures faint magnetic fields generated by brain activity. Good temporal resolution… over time…

Question 3

Positron Emission Tomography (PET)

Answer 3

Measures brain activity by recording emission of radioactivity from injected chemicals, typically glucose.

Question 4

Functional Magnetic Resonance Imaging (fMRI)

Answer 4

Scans brain to detect amount of hemoglobin with oxygen (dilation of blood vessels and subsequent decrease in oxygen concentration indicate activity.)

Question 5

Computerized axial tomography (CAT)

Answer 5

X-rays passed thru head and recorded by detectors on opposite side to create structural image

Question 6

Magnetic Resonance Imaging (MRI)

Answer 6

Recognize the electromagnetic energy released by water molecules after application and removal of magnetic field and thereby form image of the brain.

Question 7

Ablation

Answer 7

Surgical removal of 1 pt of brain

Question 8

Stereotaxic instrument

Answer 8

Used to make a lesion by directing an electrical current thru electrode into desired brain structure

Question 9

Sham lesion

Answer 9

All steps of lesion without electrical current