more detail on gpi

leabra/pbwm_net.go

@@ -106,7 +106,7 @@ func (nt *Network) AddDorsalBG(prefix string, nY, nMaint, nOut, nNeurY, nNeurX i
 	mtxGo.Doc = "Matrisome (Matrix) striatum medium spiny neuron (MSN), which is the input layer of the basal ganglia (BG), with more D1 than D2 dopamine receptors, that drives the direct pathway to disinhibit BG outputs, favoring a 'Go' response"
 	mtxNoGo.Doc = "Matrisome (Matrix) striatum medium spiny neuron (MSN), which is the input layer of the basal ganglia (BG), with more D2 than D1 dopamine receptors, that drives the indirect pathway through the globus pallidus external segment (GPe) net inhibit BG outputs, favoring a 'NoGo' response"
 	gpe.Doc = "Globus pallidus external segment (GPe) of the BG that is tonically active and inhibited by the Matrix NoGo pathway, causing disinhibition of the GPi, and net inhibition of overall BG output responding."
-	gpi.Doc = "Globus pallidus internal segment (GPi) of the BG that is tonically active and inhibited by the Matrix Go pathway (and disinhibited by the GPe via NoGo), which then inhibits the thalamus (Thal), with the net effect of disinhibiting cortical areas on BG Go pathway activation. This layer summarizes both GPi and Thal in a net excitatory, activity-positive manner."
+	gpi.Doc = "Globus pallidus internal segment (GPi) of the BG that is tonically active and inhibited by the Matrix Go pathway (and disinhibited by the GPe via NoGo), which then inhibits the thalamus (Thal), with the net effect of disinhibiting cortical areas on BG Go pathway activation. This layer summarizes both GPi and Thal in a net excitatory, activity-positive manner. It sends gating signals to PFC via 'SendTo' layer names, not using standard synaptic pathways."
 	cin.Doc = "Cholinergic interneurons (CIN) that represent a positively rectified, non-prediction-discounted reward and overall sensory salience signal, that modulates overall BG activity and learning around salient events."
 	return
 }