Neurocognitive deficit is the ability to shut down a person's upper brain functions, enabling the user to render others unconscious.
- Anna Korolenko is the only character known to have this ability.
Anna's ability has only been shown to shut down the upper brain functions of those around her. Anna used her ability on her family and destroyed them mentally. According to Dr. Suresh, her ability has been known to affect and disorient sensory perception, motor commands, language skills, and even conscious thought.
According to Anna, she had headaches and enhanced senses when she first used her ability and then lost consciousness. However, since then, she has been able to stay awake while using her ability. She did not say as to whether she still had enhanced senses while using the ability.