Abstract
The neuromuscular junction (NMJ) is a cholinergic synapse that controls muscle contraction. Glial cells, called perisynaptic Schwann cells, surround nerve terminals at the NMJ. Transmitter release induced by repetitive nerve stimulation, elicit a frequency-dependent activation of G-protein-coupled receptors on perisynaptic Schwann cells and the release of calcium from internal stores. In return, perisynaptic Schwann cells modulate synaptic activity during and following high-frequency stimulation through short-term plasticity. In the present review, we discuss evidence of glial involvement in the short-term plasticity at the NMJ and the potential impact of such modulation on synaptic efficacy.
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