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Literature DB >> 6610742

Charge movements near the mechanical threshold in skeletal muscle of Rana temporaria.

Abstract

Charge movement was investigated over a range of potentials close to the mechanical threshold in voltage-clamped frog skeletal muscle. The delayed (q gamma) component of the charging currents appeared with a time course lasting well over 100 ms at around -50 to -40 mV, but the currents became larger and faster with further depolarization. The slow charging current was investigated using a 10 mV probe step intercepting the time course of these currents. This procedure showed that the charging currents could last as long as 100-300 ms. The total charge was conserved when the charging current was small and prolonged. The results can be related directly to earlier findings concerning contractile activation of muscle by applied voltage steps to potentials near threshold ( Adrian , Chandler & Hodgkin, 1969).

Entities: Disease Species

Mesh：

Year: 1984 PMID： 6610742 PMCID： PMC1199350 DOI： 10.1113/jphysiol.1984.sp015169

Source DB: PubMed Journal: J Physiol ISSN： 0022-3751 Impact factor: 5.182

20 in total

Charge movements near the mechanical threshold in skeletal muscle of Rana temporaria.

1. Charge movement in the membrane of striated muscle.

2. A non-linear voltage dependent charge movement in frog skeletal muscle.

Review 3. Gating currents and charge movements in excitable membranes.

4. Charge movement and membrane capacity in frog muscle.

5. Membrane capacity measurements on frog skeletal muscle in media of low ion content.

6. Voltage dependent charge movement of skeletal muscle: a possible step in excitation-contraction coupling.

7. The effect of diameter on the electrical constants of frog skeletal muscle fibres.

8. The kinetics of mechanical activation in frog muscle.

9. Reactivation of membrane charge movement and delayed potassium conductance in skeletal muscle fibres.

10. Effects of glycerol treatment and maintained depolarization on charge movement in skeletal muscle.

1. 'Off' tails of intramembrane charge movements in frog skeletal muscle in perchlorate-containing solutions.

2. Intramembrane charge movements in frog skeletal muscle in strongly hypertonic solutions.

3. A reconstruction of charge movement during the action potential in frog skeletal muscle.

4. The relationship between Q gamma and Ca release from the sarcoplasmic reticulum in skeletal muscle.

5. The effect of phenylglyoxal on contraction and intramembrane charge movement in frog skeletal muscle.

6. Initial charge distribution and capacity transients in frog skeletal muscle.

7. Kinetic separation of charge movement components in intact frog skeletal muscle.

8. Analysis of 'off' tails of intramembrane charge movements in skeletal muscle of Rana temporaria.

9. Experimental analysis of the relationship between charge movement components in skeletal muscle of Rana temporaria.

10. Asymmetric charge movement in contracting muscle fibres in the rabbit.