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
The Grinding Wheel has received generally positive reviews from critics. Blabbermouth.net writer Ray Van Horn Jr. gave the album a rating of nine-and-a-half out of ten, and said, "If you think Overkill expended its tanks producing output with such astonishing velocity, you don't know this band very well. For its eighteenth album, "The Grinding Wheel", Overkill does the unthinkable: it outdoes itself. Consider that some fans dropped off after 1991's "Horrorscope", which is those poor saps' folly. For the diehard wrecking crew, "The Grinding Wheel" is going to be a gift to cling to throughout 2017." He finished his review, saying that the