PMID: 5965893Jul 1, 1966Paper

The effects of hypoxia on neuromuscular transmission in a mammalian preparation

The Journal of Physiology
J I Hubbard, Y Loyning


1. The rat diaphragm-phrenic nerve preparation in vitro failed to contract in response to nerve impulses after 10-20 min exposure to solutions containing 95% N(2) and 5% CO(2) (hypoxic solutions) at temperatures between 33 and 38 degrees C. Intracellular recording revealed that end-plate potential (e.p.p.) amplitudes fell below the firing threshold for muscle fibres and then disappeared probably because of block of intramuscular nerve conduction.2. In curarized and Mg-paralysed preparations the reduction in e.p.p. amplitudes was found to be due to a fall in their quantal content. In about half of the Mg-paralysed preparations, however, and in curarized preparations after repeated exposures, there were increases in quantal content of e.p.p.s during hypoxia.3. Miniature end-plate potential (m.e.p.p. frequency increased in a cyclic fashion during hypoxia and this increase was largely suppressed in the presence of a raised extracellular Mg concentration. M.e.p.p. amplitude increased (range 0-100% of control value) after about 20 min hypoxia.4. Post-tetanic potentiation of e.p.p. amplitudes and m.e.p.p. frequency was reduced after exposure to hypoxic solutions. During hypoxia the e.p.p. amplitude potentiation was reduced but the m.e...Continue Reading


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Nov 1, 1987·Toxicology and Applied Pharmacology·K D WilliamsR E Peterson
Apr 1, 1975·Experimental Neurology·M Curran, D J Parry
Dec 31, 2011·Experimental Neurology·Janet D TalbotJohn N Barrett
Apr 22, 1982·Brain Research·A R Blight, W Precht
Mar 1, 1980·Muscle & Nerve·P M Shalton, A C Wareham
Jun 1, 1985·Muscle & Nerve·G J ParryM J Brown
Oct 26, 2005·Muscle & Nerve·Xiaoping ZhuP N Richard Dekhuijzen
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