<prompt> The synol bursa which commonly communicates with the cavity of the shoulder joint isSubscapular bursaInfraspinatus bursaSubacromial bursaSupraspinatus bursa  <response>: The joint cavity communicates with the subscapular bursa, with the synol sheath for the tendon of the long head of the biceps brachii, and often with the infraspinatus bursa.Ref: BD Chaurasia; Volume 1; 6th edition; Page no: 144 