Infact i analysed few naked skulls of myna and crow which were collected during the natural decay of the carcasses. There were two types of skulls; one with intact and fixed quadrate bones at their respective joints (quadrative jugal complex and the joint with squamous temporal) and the other with no quadrate bone or with the quadrate bone free at the temporal side. The former ones when manuplated physically at nasal frontal hinge showed kines upto the level of quadrate bone, where as the later ones showed no movement. My confusion is wether the joint between the quadrate bone and temporal bone is mobile or not and if fixed then how is the cranial kinesis performed in live birds? Also answer me the above two questions?

To every one of you who has some idea.