Any process that activates or increases the frequency, rate or extent of signaling pathways initiated by the cross-linking of an antigen receptor on a B- or T cell.
synonyms:
stimulation of antigen receptor-mediated signaling pathway,
up regulation of antigen receptor-mediated signaling pathway,
upregulation of antigen receptor-mediated signaling pathway,
positive regulation of antigen receptor mediated signalling pathway,
up-regulation of antigen receptor-mediated signaling pathway,
activation of antigen receptor-mediated signaling pathway
