]> TH negative neuron associated with PAM cluster VFB:FBbt_00047184 fly_anatomy.ontology FBbt:00047184 Neuron associated with the protocerebral anterior medial (PAM) cluster that does not express tyrosine hydroxylase (TH). These neurons innervate slices 1, 2 and 4 of the mushroom body gamma lobe. adult neuron has synaptic IO in region part of adult brain mushroom body gamma lobe slice 1 mushroom body gamma lobe slice 2 mushroom body gamma lobe slice 4