diff --git a/elements/neuron/postsynapse.md b/elements/neuron/postsynapse.md
index c246ade..0351cae 100644
--- a/elements/neuron/postsynapse.md
+++ b/elements/neuron/postsynapse.md
@@ -31,7 +31,7 @@ POSTSYNAPSE
 
     # Context  
     *bAP: INTRICATION [ ref: &SOMA.*bAP ]
-    *TunPossible: INTRICATION [ ref: &?.*TunPossible ]
+    *TunPossible: INTRICATION [ ref: &NEURON.*TunPossible ]
     
     # Tub
     _NT: INTRICATION [ ref: &ASTROSYNAPSE._NT ] 
diff --git a/elements/neuron/presynapse.md b/elements/neuron/presynapse.md
index bfe330c..b4c2532 100644
--- a/elements/neuron/presynapse.md
+++ b/elements/neuron/presynapse.md
@@ -33,7 +33,7 @@ PRESYNAPSE
 
     # Context  
     *AP: INTRICATION [ ref: &SOMA.*AP ]
-    *TunePossible: INTRICATION [ ref: &... ] # To be defined...
+    *TunePossible: INTRICATION [ ref: &NEURON.*TunePossible ] 
 
     # Tub
     _NT: INTRICATION [ ref: &ASTROSYNAPSE._NT ]