Final answer:
Hadley describes bizarre symptoms called cervical dystonia, which includes uncontrollable head and neck movements and abnormal head positioning. These symptoms can hinder routine activities like driving and may present alongside other systemic signs such as unusual bleeding or neurological symptoms.
Step-by-step explanation:
In addition to local and referred pain with cervical encroachment, Hadley describes bizarre symptoms called cervical dystonia. Some symptoms of cervical dystonia include uncontrollable head and neck movements and abnormal head positioning, which can significantly interfere with daily activities such as driving. Additional systemic and neurological signs and symptoms listed in various medical conditions that could be described as bizarre may include: unusual bleeding or discharge, thickening or lump in the body, indigestion, difficulty swallowing, nagging cough, hoarseness, pelvic pain, intermenstrual bleeding, and neurological symptoms.