It is, in fact, a reparative callus, and the reason it reaches so large a size is probably to be accounted for by the pull of the extensor pedis upon the detached pyramidal process.
The os pedis ossifies from two centres, one of which is for the articular surface; but this epiphysis fuses with the rest of the bone before birth.
The os pedis is occasionally found necrotic just where the cartilage joins it, or it may be that a small portion of the sensitive laminæ, by reason of its liver-red or even gray coloration, gives evidence of death of the part.
As with fractures of the os pedis and the os coronæ, so with this exact diagnosis is difficult--we may say almost impossible.
The lower margin of the os pedis or portions of the wings are commonly the seat of such changes.
With the descent of the os pedis we get in many cases a penetration of the horny sole (see Fig.
With the horn of the sole thus deteriorated by reason of excessive and continued pressure upon the parts secreting it, it is not surprising to find that, in many cases, actual penetration of it with the os pedis occurs.
Seeing that the structures above the hoof are still normally adherent to the bones, it follows that they must, as the os pedis sinks, be carried with it.
It is this change, together with the appearance of the rings, that indicates the loosening of the attachment of the os pedis to the wall, and its afterwards backward and downward direction (see Fig.
The alterations to be met with are best observed by taking a foot so diseased and making of it two sections--one longitudinal, from before backwards; the other horizontal, and in such a position as to cut the os pedis through at its centre.
It is met with, too, in navicular disease, in the extension of irritating discharges in cases of quittor, and in cases of chronic laminitis where the solar margin of the os pedis has penetrated the sole.
Injuries to the os pedis are met with in the anterior zone of the foot.
For instance, a prick that penetrates to the sensitive sole and is not driven with sufficient force to seriously injure the os pedis we may regard as simple.
As for the dorsalis pedis of the ox and the horse, it is extremely rudimentary, and occupies the superior part of the canon.
Also called the extensor brevis digitorum, the dorsalis pedis muscle is found in all domestic quadrupeds; but its development is so much the less as the number of digits is more reduced.
The extensor pedis runs down in front of the leg, is attached on the most prominent point of the coffin bone, and has for function the straightening of the bones of the ankle and foot.
The flexor pedis perforatus, or superficial flexor of the foot, follows the course of the preceding tendon and is attached to the middle of the ankle.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "pedis" in a variety of sentences. We hope that you will now be able to make sentences using this word.
