Regulation of nAChR subunit gene expression relative to the development of pre- and postsynaptic projections of embryonic chick sympathetic neurons

The timing of presynaptic projections to lumber sympathetic neurons and the timing of the projections from such neurons to their targets during normal embryonic growth has been identified. The introduction of substantial synaptic input to chick sympathetic ganglia is a tedious mechanism in late embryonic growth. Neuronal nicotinic receptor nAChR expression during embryogensis is mediated by presynaptic input and target contact.