Volume 279, July 2000

Volume 48, July 2000

Figure 1A on R211 was incorrect; the correct figure is below.

View larger version (43K): [in this window] [in a new window]   Fig. 1.   Sites of stimulation and associated patterns of spinal sympathetic outflow. A: histological section showing site of raphe stimulation leading to differential pattern of spinal sympathetic outflow. Electrode tract is identified by the arrow. B: schematic view of the dorsal surface of the brain stem from 5 mm rostral to 5 mm caudal to the obex. , Sites projected onto dorsal medullary surface from which differential patterns in spinal sympathetic outflow were elicited. , Sites from which uniform increases in 10-Hz activity of all 3 nerves were observed. C and D: original recordings (low-pass filtered at 100 Hz) of discharges of inferior cardiac (CN), vertebral (VN), and renal (RN) postganglionic nerves. In C, stimulation at a site 1 mm caudal to the obex, on the midline, at a depth of 1 mm was begun at the arrow. Stimulus frequency (10.2 Hz) was the same as that of the free-running rhythm. In D, a site 2 mm rostral to the obex, on the midline, at a depth of 2 mm was stimulated at a frequency (8.8 Hz) equal to that of the free-running rhythm. Data in C and D are from different baroreceptor-denervated cats.