diff --git a/modules/winnertakeall/winnertakeall.md b/modules/winnertakeall/winnertakeall.md
index 5251a4f..950ab4a 100644
--- a/modules/winnertakeall/winnertakeall.md
+++ b/modules/winnertakeall/winnertakeall.md
@@ -22,8 +22,8 @@ WINNERTAKEALL
 
   expansion:
   
-    @NEU_005: EXPAND [ comp: NEURON ]
-    @NEU_006: EXPAND [ comp: NEURON ]
+    @NEU_005: EXPAND [ comprehension: NEURON ]
+    @NEU_006: EXPAND [ comprehension: NEURON ]
 
   instantiation:
 
diff --git a/organism.md b/organism.md
index 80b10fb..a06c23a 100644
--- a/organism.md
+++ b/organism.md
@@ -15,9 +15,9 @@ ORGANISM
     organs/vertebrae/vertebrae.md
 
   expansion:
-    @TECTUM: EXPANSION [ expansion: TECTUM ]
-    @VERTEBRAE: EXPANSION [ expansion: VERTEBRAE ]
-    @HYPOTHALAMUS: EXPANSION [ expansion: HYPOTHALAMUS ]
+    @TECTUM: EXPANSION [ comprehension: TECTUM ]
+    @VERTEBRAE: EXPANSION [ comprehension: VERTEBRAE ]
+    @HYPOTHALAMUS: EXPANSION [ comprehension: HYPOTHALAMUS ]
 
   instantiation:
     # scope
@@ -27,7 +27,6 @@ ORGANISM
 
     # Context
 
-
     # tubs
 
     # behaviour
diff --git a/organs/tectum/tectum.md b/organs/tectum/tectum.md
index 5f0df2f..95587e7 100644
--- a/organs/tectum/tectum.md
+++ b/organs/tectum/tectum.md
@@ -1,6 +1,6 @@
 # tectum.md
 
-## TECTUM: comprehension
+## TECTUM
 
 Qui comprendiamo il collegamento fra moduli tipo winnertakeall che mettono a disposizione delle interfacce che devono essere collegate fra moduli. I neuroni sono gia' dichiarati nei moduli, quello che manca sono gli ASTROCYTE. Consideriamo che gli ASTROCYTE sono interni ad un organo.
 
@@ -13,34 +13,42 @@ TECTUM
     ../../modules/winnertakeall.md
     ../../elements/astrocyte.md 
 
-  expand_comprehension:
+  expansion:
 
-    # Modules
-    @WTA-001: WINNERTAKEALL []
-    @WTA-002: WINNERTAKEALL []
+    @WTA-001 EXPANSION [ comprehension: WINNERTAKEALL ]
+    @WTA-002 EXPANSION [ comprehension: WINNERTAKEALL ]
 
-    # Astrocytes
-    @AST-001: ASTROCYTE []
-    @AST-002: ASTROCYTE []
+    @AST-001 EXPANSION [ comprehension: ASTROCYTE ]
+    @AST-002 EXPANSION [ comprehension: ASTROCYTE ]
 
-    @: bind [@WTA-001, @AST-001]
+    @ BIND [ comprehension: @WTA-001, comprehension: @AST-001 ]
 
-  istantiate_container:
+  istantiation:
 
     # Qui l'interprete deve controllare che due o piu' "in" non sono ammessi, perche' potrebbero riguardare ASTROCYTE diversi. Da capore come fare il controllo.
 
-    # external intrication
+    # external
 
     @: OUT-EXCITATION [out: @WTA-001.@OUT-EXCI-001]
     @: IN-EXCITATION [in: @WTA-003.@OUT-EXCI-001]
 
-    # interanl intrication
+    @IN-EXCI-001: BEHAVIOUR [ behaviour: IN_EXCITATION, __GroupPossible: GROUP [
+       post: @NEU_001.@D_BRANCH_002._postsynapse, 
+       post: @NEU_002.@D_BRANCH_002._postsynapse, 
+       astro: @NEU_001.@D_BRANCH_002._astrosynapse ] ]
+
+    # internal
 
     @: EXCITATION [out: @WTA-001.@OUT-EXCI-001, in: @WTA-003.@IN-EXCI-002]
     @: INHIBITION [out: @WTA-002.@OUT-INHI-001, in: @WTA-003.@IN-INHI-004]
+
+    @: BEHAVIOUR [ behaviour: EXCITATION, __GroupPossible: GROUP [ 
+      pre: @NEU_001.@AXON-001._presynapse, 
+      post: @NEU_001.@D_BRANCH_001._postsynapse, 
+      astro: @NEU_001.@D_BRANCH_001._astrosynapse ] ]
 ```
 
-## EXCITATION: Container
+## EXCITATION
 
 ```Gen