submandibular space
英[ˌsʌbmænˈdibjulə speis]美[ˌsʌbmænˈdɪbjəlɚ spes]
The submandibular space is a fascial space of the head and neck (sometimes also termed fascial spaces or tissue spaces). It is a potential space, and is paired on either side, located on the superficial surface of the mylohyoid muscle between the anterior and posterior bellies of the digastric muscle.