Miniature transmitter release: accident of nature or careful design?

Miniature transmitter release results from the constitutive low-level release of individual vesicles of neurotransmitter. Since the 1950s, this form of synaptic transmission has largely been thought to reflect a leaky evoked-release mechanism, and it was not clear whether it had a function of its own. Recent data challenge this view and suggest that miniature release can affect both the local chemistry of synapses and the network properties of neurons.