<prompt> The spaces involved in ludwigs angina areSublingualSubmandibularSubmaxillaryAll of the above  <response>: LUDWIGS ANGINA APPLIED ANATOMY :- Submandibular space lies between mucous membrane of the floor of mouth and tongue on one side and superficial layer of deep cervical fascia extending between the hyoid bone and mandible on the other. It is divided into two compaments by the mylohyoid muscle: 1. Sublingual compament above the mylohyoid. 2. Submaxillary and submental compament below the mylohyoid. The two compaments are continuous around the posterior border of mylohyoid muscle. Ludwigs angina is infection of submandibular space. Ref:- Dhingra; pg num:-263,264 