It was brought up in class discussion once that the real root of fear is not a fear of a monster, vampire, or mutated alien/bug creature. Instead we said that fear came from what these things represented. In some cases it was a fear of strange sounds that are caused in the dead of the night, or exaggerated visions of disgusting bugs creatures already found here on Earth. Whatever the source of the fear, it's here, and is in no hurry to leave. But there was something interesting that I found when we were watching The Brood in class. This was the fact that not only was there a sense of fear about what the represented, but there was at the same time a fear of them, of their physical repugnance. This was interesting because this was almost like a reverse dichotomy. Instead of the fear being broken down into its smaller parts, it was forged from two separate fears into one larger one. The two parts were a fear of the monstrous flesh that the children appeared as, and the rage and anger that they embodied and were born from. From this we can see how the movie The Brood, while not as savage and straightforward as today's horror movies, was able to capture and frighten an audience.
It is almost as if the horrific scenes in Cronenberg's movies are a violation of the taste of the filmmaker. Such scenes play with the expectations and mores of the audience. It is horrific when the characters killed in The Brood get their heads violently bashed in within the ultranormal settings of an upper-class home or a tidy schoolroom. It is horrific when Nola shows Frank her monstrous external "baby- and licks its blood sac while wearing a beautifully draped white natural linen dress that is almost fit for a nun. (N.U. p 91).
But that was not the only issue brought up in The Brood. As a matter of fact the underlying theme of this movie is the mad scientist, but not the same mad scientist theme that was shown in Frankenstein.