Mechanisms of inhibition of synaptic transmission in the sympathetic ganglia of rats with alloxan diabetes

1978 ◽  
Vol 86 (3) ◽  
pp. 1134-1137
Author(s):  
Yu. P. Pushkarev
Keyword(s):  
Synaptic Transmission ◽  
Alloxan Diabetes ◽  
Sympathetic Ganglia

Actions of ketamine on synaptic transmission in frog sympathetic ganglia

1976 ◽  
Vol 15 (2) ◽  
pp. 139-143 ◽  
Author(s):  
J.P. Gallaghert ◽  
N. Dun ◽  
H. Higashi ◽  
S. Nishi
Keyword(s):  
Synaptic Transmission ◽  
Sympathetic Ganglia

Optical monitoring of synaptic transmission in bullfrog sympathetic ganglia using a voltage-sensitive dye

1998 ◽  
Vol 242 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Tetsuro Sakai ◽  
Yoko Momose-Sato ◽  
Katsushige Sato ◽  
Akihiko Hirota ◽  
Kohtaro Kamino
Keyword(s):  
Synaptic Transmission ◽  
Sympathetic Ganglia ◽  
Optical Monitoring ◽  
Voltage Sensitive Dye

scholarly journals Slow synaptic transmission in frog sympathetic ganglia

1986 ◽  
Vol 124 (1) ◽  
pp. 259-285
Author(s):  
P. R. Adams ◽  
S. W. Jones ◽  
P. Pennefather ◽  
D. A. Brown ◽  
C. Koch ◽  
...  
Keyword(s):  
B Cells ◽  
Synaptic Transmission ◽  
Selective Reduction ◽  
Sympathetic Ganglia ◽  
Repetitive Firing ◽  
C Cells ◽  
Calcium Dependent ◽  
Potassium Conductances ◽  
Voltage Dependent ◽  
Slow Potassium

Bullfrog ganglia contain two classes of neurone, B and C cells, which receive different inputs and exhibit different slow synaptic potentials. B cells, to which most effort has been directed, possess slow and late slow EPSPs. The sEPSP reflects a muscarinic action of acetylcholine released from boutons on B cells, whereas the late sEPSP is caused by a peptide (similar to teleost LHRH) released from boutons on C cells. During either sEPSP there is a selective reduction in two slow potassium conductances, designated ‘M’ and ‘AHP’. The M conductance is voltage dependent and the AHP conductance is calcium dependent. Normally they act synergistically to prevent repetitive firing of action potentials during maintained stimuli. Computer stimulation of the interactions of these conductances with the other five voltage-dependent conductances present in the membrane allows a complete reconstruction of the effects of slow synaptic transmission on electrical behaviour.

Reversible Effects of Hyperosmolar Sucrose on Frog Sympathetic Ganglion

1973 ◽  
Vol 31 ◽  
pp. 534-535
Author(s):  
E. Minker ◽  
W. K. Riker ◽  
N. J. Russell
Keyword(s):  
Synaptic Transmission ◽  
Sympathetic Ganglion ◽  
Neuromuscular Junctions ◽  
Extracellular Recording ◽  
Sympathetic Ganglia ◽  
Discharge Frequency ◽  
Ringer’S Solution ◽  
Synaptic Structure ◽  
Structural Recovery ◽  
Saline Solutions

Saline solutions made hyperosmotic by addition of sucrose increase the discharge frequency of miniature spontaneous junctional potentials at neuromuscular junctions and sympathetic ganglia and can alter structure in both muscle and nerve. Since effects of such solutions on synaptic structure are unknown, we have investigated the influence of hyperosmolarity on function and ultrastructure in synaptic regions of isolated abdominal sympathetic ganglia of the bullfrog, Rana catesbiana.Synaptic transmission was monitored by extracellular recording of postganglionic responses to supramaximal.preganglionic stimulation (0.3 Hz). Ganglia were first equilibrated in normal frog Ringer's solution, then transferred to test solutions, and some ganglia were subsequently returned to normal Ringer's to examine functional and structural recovery.

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