21. To do that communicating, neurons first must form synapses . 22. Astrocytes signal neurons to build synapses by secreting a protein. 23. One site of mRNA translation is at polyribosomes selectively localized beneath synapses . 24. Chemical synapses allow neurons to form circuits within the central nervous system. 25. Approximately 78 % of neurogliaform cell boutons do not form classical synapses . 26. Emotional memories are thought to be stored in synapses throughout the brain. 27. Lichtman and colleagues have studied the process of synapses elimination. 28. Unstable synapses are easy to train but also prone to stochastic disruption. 29. Each climbing fiber will form synapses with 1-10 Purkinje cells. 30. It is not clear how exactly neurexin promotes the formation of synapses .
