Musculi gluteales, Musculi glutei The gluteal muscles, also often called glutes or buttock muscles, absolutely are a muscle group consisting from the gluteus maximus, gluteus medius, gluteus minimus and tensor fasciae latae muscles. But I am unsure if "untypical" is the right phrase. Need to it rather be "atypical" or https://www.theorthopaedicandpainpractice.com/lower-back-pain-treatment-stretches-a-simple-effective-guide-to-relief-and-recovery/