The Brain Eaters

The Brain Eaters is a 1958 American science fictionhorror film about alien parasites who invade the small Illinois town of Riverdale and are able to take over any living thing, mind and body, by attaching themselves to their hosts back and inserting two mandibles into the base of their spines. The film was directed by Bruno VeSota and stars Ed Nelson, Alan Jay Factor, Joanna Lee, with a brief appearance by Leonard Nimoy name misspelled in 10th place in the credits as Leonard Nemoy. The film was released by American International Pictures as a double feature with Earth vs. the Spider

Actor Bruno VeSota wanted to direct. He approached Roger Corman with the script and Corman helped him raise the low budget and arranged distribution through AIP. The film was shot in six days.The movie was known during production as The Keepers, The Keepers of the Earth, Attack of the Blood Leeches and Battle of the Brain Eaters. ........

Source: Wikipedia