BCIA:section II EEG

Instrument that detects and amplifies the elecrical activity in the brain

Potential difference between pairs of samll electrodes on scalp using conductive medium
noninvasive and excellent temporal resolution

Cycles per second
Hertz (Hz)
amplitude measured in micrvolts or millinths of a volt

1. mental states can be define
2. brain wave patterns correspond to common disorders
3. operant conditioning demonstrated alteration of brain wave patterns
4. change in brain wave frequency = change in behavior
5. brain maps distiquish psychiatric syndromes
6. using 19 electrodes demonstrates communication patterns

Cats increase SMR. The increase found to reduction of sensory input relayed to cortex and reduction in motor output

Persons with ADD

Data base of brainmaps indicate EEG are stable over time and culture free. Can assist with medication/nfb protocols

OCD
In cl. with central thea only 20% respond to SSRIs

Less activation in the left frontal lobe. (higher alpha)

Train and normalize

Cortex

Any of the large, triangular-shaped neurons in the cerebral cortex having one large apical dendrite and several smaller dendrites at the base

Difference in voltage between two different recording locations plotted over time

Synchronous activity of postsynaptic inhibitory and excititory potentials involving large groups of cortical pyramidal cells.

Groups of pyramidal cells and the postsynaptic petentials formed that parallel the surcase of cortex sending +,- towards the cortical surface.