text: Yo, check it out, here's the lowdown, I'm 'bout to break it down,
  Intracerebral microinjection technique, let's astound,
  We localized brain sites, where morphine be,
  Facilitatin' self-stimulation rates, listen closely.
  
  Hypothalamic electrode sites, that's where it's at,
  Bilateral morphine injections, just like that,
  Two times one microgram, that's the dosage we chose,
  In ventral tegmental area and substantia nigra, it goes.
  
  Shortest latencies, the enhancement was strong,
  Morphine be pumpin', all day long,
  But hold up, don't stop, we got more to see,
  200 nanograms of morphine, still had that glee.
  
  Significant enhancement, at those sites it be,
  But 50 nanograms, didn't reach the threshold, you see,
  Below threshold for the rate-increasing effect,
  Morphine's power, it didn't connect.
  
  Now let's talk naloxone, it's the antagonist in town,
  5 milligrams per kilo, shuttin' morphine down,
  It effectively antagonized, that's for sure,
  Morphine's hold on self-stimulation, it did endure.
  
  But wait, there's more, we got another player,
  D-Ala2-Met5-enkephalinamide, yo, it's a slayer,
  Two times one microgram, that's the dose we threw,
  Strong enhancement of self-stimulation, it came through.
  
  Lasted for 70 minutes, it had that power,
  Dopaminergic substrate, it's our topic of the hour,
  Opiate-induced behavioral stimulation we discuss,
  In the realm of possibilities, it's a must.
  
  So there you have it, the rap rendition of the passage,
  Same content, same terminology, no damage,
  Intracerebral microinjection, morphine's stimulation,
  Rap style, droppin' knowledge, that's our demonstration.