diff --git a/g_comprehnesion.md b/g_comprehension.md
similarity index 93%
rename from g_comprehnesion.md
rename to g_comprehension.md
index e23dcde..9ab8e40 100644
--- a/g_comprehnesion.md
+++ b/g_comprehension.md
@@ -7,7 +7,7 @@
 Questa e' la root di entrata di un'espressione G, in questo caso di organism
 
 ```Gen
-G_comprehension
+g_comprehension
 
   type: comprehension
 
diff --git a/organism/external.actuation.md b/organism/external.actuation.md
new file mode 100644
index 0000000..e69de29
diff --git a/organism/external_sensory.md b/organism/external_sensory.md
new file mode 100644
index 0000000..e69de29
diff --git a/organism/internal-excitation.md b/organism/internal-excitation.md
new file mode 100644
index 0000000..e69de29
diff --git a/organism/internal-inhibition.md b/organism/internal-inhibition.md
new file mode 100644
index 0000000..e69de29
diff --git a/organism/organism-beh.md b/organism/organism-beh.md
index 076af03..ccd433d 100644
--- a/organism/organism-beh.md
+++ b/organism/organism-beh.md
@@ -15,9 +15,9 @@ ORGANSIM-BEH
     elements:
 
       # Organs
-      TECTUM: TECTUM
-      VERTEBRAE: VERTEBRAE
-      HYPOTHALAMUS: HYPOTHALAMUS
+      @TECTUM: TECTUM
+      @VERTEBRAE: VERTEBRAE
+      @HYPOTHALAMUS: HYPOTHALAMUS
 
     relations:
 
diff --git a/tectum/external-in-excitation.md b/tectum/external-in-excitation.md
new file mode 100644
index 0000000..0bd42de
--- /dev/null
+++ b/tectum/external-in-excitation.md
@@ -0,0 +1,16 @@
+# external-in-excitation.md
+
+## EXTERNAL-IN-EXCITATION: Tuner
+
+**external-in-excitation**:
+Qui mettiamo assieme tutte le PRESYNAPSE di una possibile relazione con un altro modulo  
+
+```Gen
+
+EXTERNAL-IN-EXCITATION
+
+  type: tuner
+
+  tub_tuned: 
+    Post: NEURON/DENDRITIC-BRANCH/expansion/POSTSYNAPSE
+```
\ No newline at end of file
diff --git a/tectum/external-in-inhibition.md b/tectum/external-in-inhibition.md
new file mode 100644
index 0000000..e69de29
diff --git a/tectum/external-out-excitation.md b/tectum/external-out-excitation.md
new file mode 100644
index 0000000..1b2466f
--- /dev/null
+++ b/tectum/external-out-excitation.md
@@ -0,0 +1,16 @@
+# external-out-excitation.md
+
+## EXTERNAL-OUT-EXCITATION: Tuner
+
+**external-out-excitation**:
+Qui mettiamo assieme tutte le POSTSYNAPSE di una possibile relazione con un altro modulo  
+
+```Gen
+
+EXTERNAL-OUT-EXCITATION
+
+  type: tuner
+
+  tunes: 
+    Post: NEURON/AXON/expansion/POSTSYNAPSE
+```
\ No newline at end of file
diff --git a/tectum/external-out-inhibition.md b/tectum/external-out-inhibition.md
new file mode 100644
index 0000000..e69de29