diff --git a/elements/neuron/axon.md b/elements/neuron/axon.md
index 95a6501..7031829 100644
--- a/elements/neuron/axon.md
+++ b/elements/neuron/axon.md
@@ -5,7 +5,10 @@ Qui comprendiamo:
 - AXON: Axon
 
 ## AXON: Container
-[Click here to read the contributing guide](presynapse.md)
+Modulation:
+- develops:
+    - [PRESYNAPSE](presynapse.md)
+
 The axon does not contain specific behavior.
 - We might add balancing of ATP within PRE later. Here we comprehend it as a “cable” transporting the AP from SOMA to Presynapse. It expands PRESYNAPSE which:
 - l'equivalente del tuning della PRESYNAPSE, come espansione dell'AXON, e' fatta da excitation/inhibition in winnertakeall. Per equivalente si intende che e' uno spostare PRESYNAPSE da actual, come se fosse un tuning.