Fig. 1
From: An in vitro experimental model for analysis of central control of sympathetic nerve activity
Photographs of a preparation. a Photograph of a thoracic cage before isolation of the brainstem-spinal cord preparation with the sympathetic nerve trunk. IX–XII, rib bones. a’ Higher magnification view of the highlighted yellow square in a after 0.5% methylene blue staining. Red arrowheads denote the sympathetic nerve trunk and yellow arrows the point at which the sympathetic nerve trunk was cut (between the Xth and XIth ribs). b Whole preparation used for the experiment. Upper right medulla; lower left sympathetic nerve trunk recorded at the level of the 10th thoracic spinal cord (red arrow). b’ Higher magnification view of the highlighted yellow square in b. Red arrow denotes the stump of the sympathetic nerve trunk recorded