Genjutsus are techniques that are employed in the same fashion as ninjutsu, requiring chakra and hand seals . However, the primary difference between the two is that the effects of genjutsu are illusory; instead of attacking the victim's body, like taijutsu or ninjutsu, genjutsu techniques manipulate the flow of chakra in the victim's brain, thus causing a disruption in their senses. This is often used to create false images or to cause pain from trauma (because the body is led to believe it is in pain); however, there are plenty of other uses depending on the situation. Genjutsu is created when a ninja extends their chakra flow through the cerebral nervous system of their opponent to control their mind, thereby affecting their five senses.