diff --git a/elements/neuron/presynapse.md b/elements/neuron/presynapse.md
index 3c8864a..81134a5 100644
--- a/elements/neuron/presynapse.md
+++ b/elements/neuron/presynapse.md
@@ -8,7 +8,7 @@ include_toc: true
 
 ## PRESYNAPSE
 
-- modulation:
+Intro:
   - is expanded and developed by: [AXON](axon.md)
   - is tuned by: ORGANISM, organs, modules
   - expands and tunes: [PRE_VGG](pre_vgcc.md)