Some research suggests that there is a genetic predisposition to anxiety disorders like panic and anxiety attacks. And other research suggests that anxiety may be a set of responses that children learn from the adults around whom they grow up. Even further research suggests that childhood traumatic experiences impact children's brain development which could lead to anxiety disorders. Whatever the cause, the effect is often debilitating to the person who experiences panic disorder or anxiety attacks, leading to missed work and classes, withdrawing from support persons, unpleasant bodily sensations (like nausea or hyperventilating), and frequent worry of "losing control".