Parafunctional activity crew. Parafunctional activity A para-functional habit or parafunctional habit is the habitual exercise of a body part in a way that is other than the most common use of that body part. The term is most commonly used by dentists, orthodontists, or maxillofacial specialists to refer to para-functional uses of the mouth, tongue and jaw. Oral para-functional habits may include bruxism (tooth-clenching and/or grinding), tongue tension ("tongue thrusting"), fingernail biting, pencil or pen chewing, mouth breathing, and any other habitual use of the mouth unrelated to eating, drinking, or speaking. Crenated tongue is a descriptive term for when scalloping develops
Involuntary servitude Involuntary servitude Involuntary servitude or involuntary slavery is a United States legal and constitutional term for a person laboring against that person's will to benefit another, under some form of coercion other than the worker's financial needs. While laboring to benefit another occurs also in the condition of slavery, involuntary servitude does not necessarily connote the complete lack of freedom experienced in chattel slavery; involuntary servitude may also refer to other forms of unfree labor. Involuntary servitude is not dependent upon compensation or its amount. The Thirteenth Amendment to the United States Constitution makes involuntary servitude illegal under any U.S.