If the nasion-inion distance is 32 cm, what is the distance from the inion to Oz?

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Multiple Choice

If the nasion-inion distance is 32 cm, what is the distance from the inion to Oz?

Explanation:
In the 10-20 system, many midline electrode positions are defined as percentages of the nasion-to-inion distance. The occipital point Oz is located 10% of that distance from the Inion toward the Nasion. So the distance from Inion to Oz equals 10% of 32 cm, which is 3.2 cm. Therefore, the Inion–Oz distance is 3.2 cm.

In the 10-20 system, many midline electrode positions are defined as percentages of the nasion-to-inion distance. The occipital point Oz is located 10% of that distance from the Inion toward the Nasion. So the distance from Inion to Oz equals 10% of 32 cm, which is 3.2 cm. Therefore, the Inion–Oz distance is 3.2 cm.

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