The subclavius muscle, E, like the pronator quadratus muscle of the forearm, serves rather to further the displacement of the broken ends of the bone than to hold them in situ.
Here the artery lies in the interval between the supinator longus and the pronator radii teres.
Forming, as in man, the internal limit of the hollow of the elbow, the pronator teres has a disposition analogous to that which characterizes the corresponding muscle in the human species.
For this cause we do not find the square pronator in either the ox or the horse, but can demonstrate its presence in the dog and the cat.
The shaft of the bone has on its internal border rugosities analogous to the imprint of the pronator radii teres of the human skeleton; these rugosities, indeed, give insertion to a muscle of the same function, and bearing the same name.
In a case of spastic contracture of the pronator muscles of the forearm, for example, an incision is made along the line of the median nerve above the bend of the elbow.
The splints are applied with the elbow flexed to a right angle, and, except when the radius is broken above the level of the insertion of the pronator teres, with the forearm midway between pronation and supination.
Tubby has devised an operation for converting the pronator radii teres into a supinator, and Robert Jones another in which the flexors of the carpus are made to take the place of the extensors.
When broken above the insertion of the pronator teres, the upper fragment is flexed and supinated by the biceps and supinator, while the lower fragment remains semi-prone, and is drawn towards the ulna by the pronator quadratus.
When the fracture is below the pronator teres, the displacement depends upon the direction of the force and the obliquity of the fracture.
Where one fragment is acted upon by powerful muscles, a rotatory displacement may take place, as in fracture of the radius above the insertion of the pronator teres, or of the femur just below the small trochanter.
When the radius is broken above the insertion of the pronator teres, its upper fragment may be supinated by the biceps and supinator muscles, while the lower fragment remains in the usual semi-prone position.
The Pronator Inferior Quadratus, springing forth from the bottom and inside of the Cubitus, is fixt in the lower and outward part of the Radius by a Tail as large as its Head.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "pronator" in a variety of sentences. We hope that you will now be able to make sentences using this word.
