Characteristics of cardiovascular responses of the bullfrog (Rana catesbeiana) to thermal stimulation of the spinal cord

1986 ◽  
Vol 156 (5) ◽  
pp. 611-616 ◽  
Author(s):  
M. Nagai ◽  
M. Iriki
Keyword(s):  
Spinal Cord ◽  
Rana Catesbeiana ◽  
Cardiovascular Responses ◽  
Thermal Stimulation ◽  
Stimulation Of

scholarly journals Dissociation by Chloralose of the Cardiovascular and Cerebrovascular Responses Evoked from the Cerebellar Fastigial Nucleus

1990 ◽  
Vol 10 (3) ◽  
pp. 375-382 ◽  
Author(s):  
Costantino Iadecola ◽  
Mary E. Springston ◽  
Donald J. Reis
Keyword(s):  
Spinal Cord ◽  
Heart Rate ◽  
Arterial Pressure ◽  
Initial Dose ◽  
Cardiovascular Responses ◽  
Fastigial Nucleus ◽  
Neural Pathways ◽  
Cerebrovascular Autoregulation ◽  
Brain And Spinal Cord ◽  
Stimulation Of

We studied the effects of chloralose anesthesia on the elevation in arterial pressure (AP), heart rate (HR), and regional CBF (rCBF) elicited by stimulation of the cerebellar fastigial nucleus (FN). Rats were anesthetized with an initial dose of chloralose (40 mg/kg s.c), paralyzed, and artificially ventilated. The FN was stimulated (50–100 μA, 50 Hz, 1 s on/1 s off) with microelectrodes stereotaxically implanted. During the stimulation AP was carefully maintained within cerebrovascular autoregulation. CBF was measured by the [14C]iodoantipyrine technique with regional dissection. In rats that received only the initial dose of chloralose, FN stimulation elevated rCBF in brain and spinal cord, up to 209 ± 13% of control in frontal cortex (n = 5; p < 0.01, analysis of variance). Administration of additional chloralose (10 mg/kg i.v., 30 min prior to measurement of CBF) did not affect resting rCBF (n = 5), the EEG, or the elevation in AP and HR elicited by FN stimulation (n = 4). However, the additional chloralose abolished the elevations in rCBF (n = 5; p > 0.05). Thus, the cerebrovasodilation elicited from the FN is more susceptible to the effects of additional anesthesia than the elevation in AP and HR. These results indicate that the cerebrovascular and cardiovascular responses elicited from the FN are functionally distinct and provide additional evidence for the notion that these responses are mediated by different neural pathways and transmitters.

Body Colour Changes Induced By Spinal Thermal Stimulation Of The Crucian Carp (Carassius Carassius)

1977 ◽  
Vol 68 (1) ◽  
pp. 89-97
Author(s):  
M. NAGAI ◽  
M. IRIKI ◽  
K. S. IWATA
Keyword(s):  
Spinal Cord ◽  
Medulla Oblongata ◽  
Crucian Carp ◽  
Thermal Stimulation ◽  
Carassius Carassius ◽  
Body Colour ◽  
Colour Changes ◽  
Vagal Lobe ◽  
Crucian Carp Carassius Carassius ◽  
Stimulation Of

1. Body colour changes of the crucian carp during spinal thermal stimulation were recorded photoelectrically. 2. Warming the spinal cord induced darkening, whereas cooling induced lightening of body colour. 3. After transection of the medulla oblongata posterior to the vagal lobe, the same colour responses as in intact fish were induced, apart from one of the seven responses to spinal cooling. 4. After spinal pithing, thermal stimulation of the spinal cord failed to induce the responses. 5. The present responses are considered to indicate influence of spinal thermal stimulation on the cutaneous sympathetic systems of this fish.

Modulated expression of c-Fos in the spinal cord following noxious thermal stimulation of monoarthritic rats

1998 ◽  
Vol 53 (2) ◽  
pp. 203-213 ◽  
Author(s):  
Jan Schadrack ◽  
Jos� M. Castro-Lopes ◽  
Ant�nio Avelino ◽  
Walter Zieglg�nsberger ◽  
Thomas R. T�lle
Keyword(s):  
Spinal Cord ◽  
Thermal Stimulation ◽  
Stimulation Of
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