No, you cannot directly become a neurosurgeon after studying only a BSc in psychology.

Neurosurgery is a highly specialized field of medicine that requires extensive medical training. A B.Sc. in psychology focuses on the behavioral and mental aspects of human functioning, while a medical degree equips you with the necessary knowledge and skills for surgical intervention in the nervous system.

The first step is to obtain a Doctor of Medicine (MD) degree. This typically involves four years of medical school education followed by residency training in neurosurgery, lasting approximately six to seven years.

Medical schools typically require applicants to have a strong foundation in science subjects like biology, chemistry, and physics during their undergraduate studies. While a psychology degree might provide some understanding of the brain, it wouldn't fulfill the science prerequisites for medical school admission.

I hope it helps!