Long term changes in augmentation, potentiation, and depression of transmitter release as a function of repeated synaptic activity at the frog neuromuscular junction¶
Magleby, K. L., & Zengel, J. E. (1976). Long term changes in augmentation, potentiation, and depression of transmitter release as a function of repeated synaptic activity at the frog neuromuscular junction. Journal of Physiology, 257(2), 471-494.
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Primes¶
- Potentiation
- Physiology: Post-tetanic potentiation (PTP) in muscle, where a brief tetanic stimulus to a motor neuron leaves the neuromuscular junction hyper-responsive for minutes afterward, increasing force output to identical stimuli, a phenomenon Magleby and Zengel (1976) characterized through their analysis of long-term changes in transmitter-release augmentation; post-extrasystolic potentiation (PEP) in cardiac physiology, where a premature beat triggers the next normal beat to produce enhanced force—the cardiac analog of PTP.
This sourceFoundational characterization of post-tetanic potentiation at the neuromuscular junction: residual presynaptic calcium and altered transmitter release kinetics underlie history-dependent force enhancement.
- Physiology: Post-tetanic potentiation (PTP) in muscle, where a brief tetanic stimulus to a motor neuron leaves the neuromuscular junction hyper-responsive for minutes afterward, increasing force output to identical stimuli, a phenomenon Magleby and Zengel (1976) characterized through their analysis of long-term changes in transmitter-release augmentation; post-extrasystolic potentiation (PEP) in cardiac physiology, where a premature beat triggers the next normal beat to produce enhanced force—the cardiac analog of PTP.
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