beneficial.
Later, vesication of a liberal area surrounding the trochanter major is
indicated. Where the condition has become chronic in horses that are to
be kept at heavy draft work there is little chance for complete
recovery. And, naturally, one is not to expect resolution in cases where
there exist erosion and ossification of cartilage--where crepitation is
discernible.

Paralysis of the Hind Leg.

Aside from paraplegic conditions due to disease of the cord or the
lumbosacral plexus, and monoplegic affections resultant from
disturbances of this plexus, paralysis of certain nerves are
occasionally encountered.

Anatomy.--The lumbosacral plexus results substantially from the union
of the ventral branches of the last three lumbar and the first two
sacral nerves, but it derives a small root from the third lumbar nerve
also. The anterior part of the plexus lies in front of the internal
iliac artery, between the lumbar transverse processes and the psoas
minor. It supplies branches to the iliopsoas[43] (designated by Girard,
the iliacomuscular nerves). The posterior part lies partly upon and
partly in the texture of the sacrosciatic ligament. From the plexus are
derived the nerves of the pelvic limb (Sisson).

Paralysis of the Femoral (Crural) Nerve.

Anatomy.--The femoral nerve (crural) is derived chiefly from the
fourth and fifth lumbar nerves. It runs ventrally and backward, at
first between the psoas major and minor, then crosses the deep face of
the tendon of the latter and descends under cover of the sartorious over
the terminal part of the iliopsoas. It innervates the psoas major
(magnus), psoas minor (parvus), sartorious, rectus femoris, vastus
lateralis (interims). Branches supply the stifle and the adductor and
pectineus muscles.

Etiology and Occurrence.--While paralysis of the femoral nerve, also
known as "dropped stifle" occurs as a result of local injuries and
melanotic tumors in gray horses, most cases are due to azoturia.
So-called crural paralysis or "hip swinney" is occasionally observed but
this is not a condition wherein the nerve is affected in the manner that
characterizes the marked atrophy of quadriceps femoris (crural) muscles
in some cases of hemaglobinuria. This form of paralysis according to
Hutyra and Marek is due primarily to diffuse degeneration of the
muscles.

Symptomatology.--When muscular atrophy is not extensive no particular
evidence of this condition may be manifested wh