Hi, Thanks for the query I understand your query. Involuntary movements result from irritation /stimulation of the nerve supplying nerve supplying muscles involved in the movement. (Spasmodic tirticolis)This can follow stress at cervical vertebrae. MRI would throw light on the possibility &medicines/local injection would manage acute stress followed by physiotherapy to prevent reccurance . Please consult a surgeon . Regards Dr. Vasudha Jayant Athavale, General & Family Physician