Brain Wavering

It is brains that mad scientists crave
Which explains their late nights by a grave
Matter dull and slow-witted
Into skulls retrofitted
Pried from craniums slightly concave.

David Cairns and Surly Hack

Abbott and Costello Meet Frankenstein (1948). Title to the contrary, there is no  Doctor Frankenstein, but there is a surgeon named Dr. Sandra Mornay (Lenore Aubert), who, at the behest of Dracula (Béla Lugosi), prepares to transplant a more compliant brain into the Monster (Glenn Strange).