text: Yo, check it out, here's the scoop
  About them cholinergic fibers, let me loop
  Straight from the basal forebrain, they connect
  With cholinoceptive cortical pyramidal neurons, direct
  
  Recent studies, they got the facts full blast
  Nicotinic acetylcholine receptors ain't just a thing of the past
  Human cerebrocortical interneurons, they got 'em too
  Visualizin' receptor subunits, that's what we gotta do
  
  Double-immunofluorescence, we on the grind
  Parvalbumin antibodies, let's define
  Chandelier and basket cells, that's the crew
  Alpha4 and alpha7 subunit proteins, they're true
  
  Them parvalbuminergic interneurons, they showed
  Immunoreactivity for alpha4 and alpha7, yo, they glowed
  If these receptors work, as studies suggest
  Cholinergic afferents got a complex connect
  
  Not just impactin' cortical projection neurons straight
  Cholinergic corticopetal fibers modulatin', no debate
  Intrinsic cortical cells gettin' the indirect touch
  Cholinergic impact, it's complex, so much
  
  The game done changed, we breakin' new ground
  Cholinergic connectivity, it's profound
  So remember, it's more complex than we thought
  Cholinergic fibers, they got connections a lot.