depressor muscle

Like living crocodilians, the depressor muscle of Sebecus was relatively underdeveloped.

Living crocodilians have a straight retroarticular process at the back of the jaw and a low point of origin for the depressor muscle.

From the prementum there run the levator and depressor muscles of the palps and a flexor of each glossa and paraglossa.

The palp has levator and depressor muscles arising in the stipes, and each segment of the palp has a single muscle causing flexion of the next segment.

In crocodilians, the depressor muscle that opens the jaws originates near the top of the skull and inserts into a projection at the back of the jaw called the retroarticular process.

However the functional role of the fat bodies within the hydraulic skeleto-muscular apparatus of the feathers is to counteract forces generated by the erector and depressor muscle of the feathers tracts.

Beginner flute-players tend to suffer fatigue in these muscles, and notably struggle to use the depressor muscle, which necessarily helps to keep the top lip directing the flow of air across the embouchure hole.

It is continued behind the depressor muscles of the hyoid bone, and, after enveloping the thyroid gland, is prolonged in front of the trachea to meet the corresponding layer of the opposite side.

More usually it is divided into subsegments, typically five in number, but none of these has acquired muscles and movement of the tarsus as a whole is effected by levator and depressor muscles arising from the apex of the tibia.

Similarly, in a physiological preparation of Periplaneta in which all sensory input from the legs had been eliminated, centrally generated patterns of activity could be demonstrated in the motor neurons that control the coxal levator and depressor muscles (Pearson and Iles, 1970).