diff --git a/neuron/presynapse.md b/neuron/presynapse.md
index be6ee20..ef0f695 100644
--- a/neuron/presynapse.md
+++ b/neuron/presynapse.md
@@ -65,19 +65,24 @@ Qui riportiamo la struttura della espressione G e una descrizione di come legger
 PRESYNAPSE:
   AP_ctx
     ms
+      -- NT released into cleft
       NTreleaseLow: ( active: 12x ) # Low
       NTreleaseMedium: ( active: 9x ) # Medium
       NTreleaseHigh: ( active: 3x ) # High
+      -- CA2+ trace accumulation
       Ca2+TracesAccumulationLow: ( active: 10x )
       Ca2+TracesAccumulationMedium: ( active: 6x ) # medium
       Ca2+TracesAccumulationHigh: ( active: 10x ) # high
 
   NOT AP_ctx
     sec
+      -- eCB
       eCBClearance: ( active: 24x ) # Slow
+      -- RP → RRP recruitment
       RPShuttleLow: ( active: 48x ) # Low
       RPShuttleMedium: ( active: 24x ) # Medium
       RPShuttleHigh: ( active: 12x ) # Fast
+      -- CA2+ trace clearance
       Ca2+TracesClearance: ( active: 30x ) # Slow
 
   VGCC-PRE