Effects of magnetic sacral root stimulation on anorectal pressure and volume

2001 ◽  
Vol 44 (12) ◽  
pp. 1827-1833 ◽  
Author(s):  
G. L. Morren ◽  
S. Walter ◽  
O. Hallböök ◽  
R. Sjödahl
Keyword(s):  
Root Stimulation ◽  
Anorectal Pressure

Anorectal pressure in patients with symptomatic hemorrhoids

1986 ◽  
Vol 29 (6) ◽  
pp. 388-391 ◽  
Author(s):  
Mohamed Abdel-Fattah El-Gendi ◽  
Nabil Abdel-Baky
Keyword(s):  
Anorectal Pressure

H-reflex to S1-root stimulation improves utility for diagnosing S1 radiculopathy

2010 ◽  
Vol 121 (8) ◽  
pp. 1329-1335 ◽  
Author(s):  
Xiang Jin ◽  
Yu Zhu ◽  
Fei Zhou Lu ◽  
Xiao Dong Wu ◽  
Dong Qing Zhu ◽  
...  
Keyword(s):  
H Reflex ◽  
Root Stimulation

Effects of some divalent cations on motoneurones in cats

1979 ◽  
Vol 57 (9) ◽  
pp. 944-956 ◽  
Author(s):  
K. Krnjević ◽  
Y. Lamour ◽  
J. F. MacDonald ◽  
A. Nistri
Keyword(s):  
Membrane Potential ◽  
Action Potential ◽  
Intracellular Recording ◽  
Dorsal Root ◽  
Divalent Cations ◽  
The Other ◽  
Depressant Effect ◽  
Na Inactivation ◽  
Conductance Increase ◽  
Root Stimulation

In cats under Dial, Co, Mn, La, and Sr were injected extracellularly near lumbosacral motoneurones. All tended to improve intracellular recording, but when the membrane potential was initially stable, Mn, and especially Co, had a moderate and reproducible depolarizing action. Both Mn and Co depressed excitatory postsynaptic potentials evoked by dorsal root stimulation. The prominent after-hyperpolarization (a.h.p.), which normally follows the motoneuronal action potential, was consistently and reversibly depressed by Mn and Co (as well as La), the underlying conductance increase being also diminished, but there was no significant reduction in the after-depolarization. By contrast, Sr tended to potentiate the a.h.p., especially when this was depressed by a previous injection of Co or Mn. Unlike the other cations, Co had a marked depressant effect on the action potential, particularly its rate of rise. Since the action potential could be immediately restored by hyperpolarization or by an injection of Sr (in the absence of depolarization), Co may enhance Na inactivation.

ATP concentrations and muscle tension increase linearly with muscle contraction

2003 ◽  
Vol 95 (2) ◽  
pp. 577-583 ◽  
Author(s):  
Jianhua Li ◽  
Nicholas C. King ◽  
Lawrence I. Sinoway
Keyword(s):  
Skeletal Muscle ◽  
Electrical Stimulation ◽  
Muscle Contraction ◽  
Motor Nerve ◽  
Muscle Tension ◽  
Nerve Fibers ◽  
Ventral Root ◽  
Ventral Roots ◽  
Root Stimulation ◽  
Stimulation Of

Previous studies have suggested that activation of ATP-sensitive P2X receptors in skeletal muscle play a role in mediating the exercise pressor reflex (Li J and Sinoway LI. Am J Physiol Heart Circ Physiol 283: H2636–H2643, 2002). To determine the role ATP plays in this reflex, it is necessary to examine whether muscle interstitial ATP (ATPi) concentrations rise with muscle contraction. Accordingly, in this study, muscle contraction was evoked by electrical stimulation of the L7 and S1 ventral roots of the spinal cord in 12 decerebrate cats. Muscle ATPi was collected from microdialysis probes inserted in the muscle. ATP concentrations were determined by the HPLC method. Electrical stimulation of the ventral roots at 3 and 5 Hz increased mean arterial pressure by 13 ± 2 and 16 ± 3 mmHg ( P < 0.05), respectively, and it increased ATP concentration in contracting muscle by 150% ( P < 0.05) and 200% ( P < 0.05), respectively. ATP measured in the opposite control limb did not rise with ventral root stimulation. Section of the L7 and S1 dorsal roots did not affect the ATPi seen with 5-Hz ventral root stimulation. Finally, ventral roots stimulation sufficient to drive motor nerve fibers did not increase ATP in previously paralyzed cats. Thus ATPi is not largely released from sympathetic or motor nerves and does not require an intact afferent reflex pathway. We conclude that ATPi is due to the release of ATP from contracting skeletal muscle cells.

Electrocystometry by Percutaneous Sacral Nerve-root Stimulation

1968 ◽  
Vol 29 (1) ◽  
pp. 202-202 ◽  
Author(s):  
Thomas Koelz ◽  
Hugh D. Westgate
Keyword(s):  
Nerve Root ◽  
Sacral Nerve Root ◽  
Sacral Nerve ◽  
Root Stimulation

Selective detrusor activation by sacral ventral nerve-root stimulation: results of intraoperative testing in humans during implantation of a Finetech-Brindley system

1998 ◽  
Vol 16 (5) ◽  
pp. 337-341 ◽  
Author(s):  
Nico J. M. Rijkhoff ◽  
Hessel Wijkstra ◽  
Philip E. V. van Kerrebroeck ◽  
Frans M. J. Debruyne
Keyword(s):  
Nerve Root ◽  
Root Stimulation
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