Figure 1. Somatosensory evoked potential (SSEP) at 30, 60, 90, and 120 min after cerebral arterial air embolism in animals pretreated with saline (open circles, n = 7) or doxycycline (solid circles, n = 7). A, top row: SSEP amplitude in each group at each time point. Bar designates median. B, lower row: Relationship between SSEP amplitude at each time point and corresponding 4 h neurologic impairment score. tau refers to Kendall's nonparametric correlation coefficient. A straight line is drawn to aid visualization.