ks massage and exercises are employed.

In other cases there is no history of injury, but whenever the foot is
everted the tendon of the peroneus longus is liable to be jerked
forwards out of its groove, sometimes with an audible snap. The patient
suffers pain and is disabled until the tendon is replaced. Reduction is
easy, but as the displacement tends to recur, an operation is required
to fix the tendon in its place. An incision is made over the tendon; if
the sheath is slack or torn, it is tightened up or closed with catgut
sutures; or an artificial sheath is made by raising up a quadrilateral
flap of periosteum from the lateral aspect of the fibula, and stitching
it over the tendon.

Similarly the _tibialis posterior_ may be displaced over the medial
malleolus as a result of inversion of the foot.

The _long tendon of the biceps_ may be dislocated laterally--or more
frequently medially--as a result of violent or repeated rotation
movements of the arm, such as are performed in wringing clothes. The
patient is aware of the displacement taking place, and is unable to
extend the forearm until the displaced tendon has been reduced by
abducting the arm. In recurrent cases the patient may be able to
dislocate the tendon at will, but the disability is so inconsiderable
that there is rarely any occasion for interference.

#Wounds of Muscles and Tendons.#--When a muscle is cut across in a
wound, its ends should be brought together with sutures. If the ends are
allowed to retract, and especially if the wound suppurates, they become
united by scar tissue and fixed to bone or other adjacent structure. In
a limb this interferes with the functions of the muscle; in the
abdominal wall the scar tissue may stretch, and so favour the
development of a ventral hernia.

Tendons may be cut across accidentally, especially in those wounds so
commonly met with above the wrist as a result, for example, of the hand
being thrust through a pane of glass. It is essential that the ends
should be sutured to each other, and as the proximal end is retracted
the original wound may require to be enlarged in an upward direction.
When primary suture has been omitted, or has failed in consequence of
suppuration, the separated ends of the tendon become adherent to
adjacent structures, and the function of the associated muscle is
impaired or lost. Under these conditions the operation of secondary
suture is indicated.

A free incision is necessary to