What is the distance from T3 to Oz if the circumference of the patient's head is 50 cm?

To determine the distance from T3 to Oz, we need to understand the anatomical landmarks and the relationship between them in relation to the circumference of the patient's head. The T3 and Oz points are part of the International 10-20 system of electrode placement used in EEG and other neurophysiological assessments.

The T3 point is located around the temporal region on the left side of the head, while the Oz point is located at the occipital region toward the back of the head. The distance between these points can be derived by recognizing that both are positioned along the circumference of the patient's head.

When the circumference of the head is known to be 50 cm, we can apply the principles of this system. In the 10-20 system, certain distances between points are predetermined based on the total circumference. Specifically, if the full head circumference accounts for the entire placement configuration, we can calculate segments of that circumference to find the distance between specific points.

The distance from T3 to Oz is generally a calculated fraction of the total circumference. Given the established norms in the field, the distance from T3 to Oz corresponds to a specific segment of the head's circumference. When the head circumference measures 50 cm, the distance between these two