The circumferential measurement is 58cm. What is the distance between O1 and O2?

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Multiple Choice

The circumferential measurement is 58cm. What is the distance between O1 and O2?

Explanation:
In the 10-20 EEG electrode placement system, distances around the head are set as percentages of the head circumference. The occipital pair O1 and O2 are spaced by one-tenth of the head circumference along the arc around the back of the head. So the distance between them equals 0.1 times the circumference. With a head circumference of 58 cm, the distance is 0.1 × 58 = 5.8 cm.

In the 10-20 EEG electrode placement system, distances around the head are set as percentages of the head circumference. The occipital pair O1 and O2 are spaced by one-tenth of the head circumference along the arc around the back of the head. So the distance between them equals 0.1 times the circumference. With a head circumference of 58 cm, the distance is 0.1 × 58 = 5.8 cm.

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