在背部，第7胸椎棘突下凹陷中，后正中线上。

注：当后正中线与肩胛骨下角水平线交点处，第7胸椎棘突下凹陷中。

In the upper back region, in the depression inferior to the spinous process of the seventh thoracic vertebra (T7), on the posterior median line.

Note: The depression inferior to the spinous process of the seventh thoracic vertebra (T7) which is at the intersection of two imaginary lines: the posterior midline and the horizontal line of the inferior border of the inferior angle of the scapula.

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