DOT 2

• A method used to reduce the noise of the background EEG

  signal averaging
• the positive wave that occurs about 300 milliseconds after a momentary stimulus that has meaning for the participant

  P300 wave
• small waves that are recorded from the scalp, they originate far away in the sensory nuclei of the brain stem.

  far-field potentials
• This measures changes in magnetic fields on the surface of the scalp that are produced by changes in underlying patterns of neural activity.

  magnetoencephalography (MEG)
• The usual procedure for measuring muscle tension.

  Electromyography
• electrophysiological technique for recording eye movements

  electrooculography
• A measure of the background level of skin conductance that is associated with a particular situation.

  skin conductance level (SCL)
• A measure of the transient changes in skin conductance that are associated with discrete experiences.

  skin conductance response (SCR)
• The electrical signal associated with each heartbeat can be recorded through electrodes placed on the chest. The recording is called an

  electrocardiogram (ECG)
• a measurement of the peak pressure during the periods of heart contraction.

  systoles
• measurement of the minimum pressure during the periods of relaxation

  diastoles
• usually expressed as a ratio of systolic over diastolic blood pressure in millimeters of mercury (mmHg)

  Blood Pressure
• A chronic blood pressure of more than 140/90 mmHg is viewed as a serious health hazard called ________.

  hypertension
• a crude device composed of a hollow cuff, a rubber bulb for inflating it, and a pressure gauge for measuring the pressure in the cuff

  sphygmomanometer
• the various techniques for measuring changes in the volume of blood in a particular part of the body.

  Plethysmography
• means by which experimental devices are precisely positioned in the depths of the brain

  Stereotaxic surgery
• This is used to locate brain structures in much the same way that a geographic atlas is used to locate geographic landmarks.

  stereotaxic atlas
• the point on the top of the skull where two of the major sutures

  bregma
• has two parts: a head holder, which firmly holds each subject’s brain in the prescribed position and orientation; and an electrode holder, which holds the device to be inserted.

  stereotaxic instrument
• a lesion is to be made in an area of cortical tissue that is accessible to the eyes and instruments of the surgeon

  aspiration