Clean Run Magazine - March 2007 - 67

Warning : session_start : The session id contains invalid characters,
valid characters are only a-z, A-Z and 0-9 in
/mnt/data/www.nxtbook.com/fx/config_1.3/global.php on line 9 Warning :
session_start : Cannot send session cache limiter - headers already sent
output started at /mnt/data/www.nxtbook.com/fx/config_1.3/global.php:9 in
/mnt/data/www.nxtbook.com/fx/config_1.3/global.php on line 9 Warning :
Cannot modify header information - headers already sent by output started
at /mnt/data/www.nxtbook.com/fx/config_1.3/global.php:9 in
/mnt/data/www.nxtbook.com/fx/config_1.3/global.php on line 10 >Iliopsoas
Strains Acute, stretching-induced muscle injuries are estimated to account
for over 30% of injuries seen in a typical human sports medicine practice
and have been reported to be the most common injury seen in human general
practices. Acute muscle injuries have rarely been reported in the small
animal veterinary literature, and discussion of chronic muscle disorders
in dogs is limited to a handful of classical syndromes or inflammatory
conditions. Given the similarities between the human and canine
musculoskeletal system, it seems unlikely that such common injuries in
human athletes would not also be common in the canine athlete. It is
probable that the low reported prevalence of muscle injury in dogs is due
to a failure to diagnose the condition. Signs of an iliopsoas strain may
include a “tucked” position and lack of drive from the rear when
weaving. A possible cause of an iliopsoas strain might be repeated jumping
with extreme extension of the hind limbs active eccentric muscle
contraction as shown by the photograph on the previous page. © DOGHOUSE
ARTS Causes Iliopsoas strains occur as the result of excessive force
acting on this muscle, and are commonly associated with highly athletic
activities such as agility. These injuries often occur at or near the
muscle-tendon junction, which is the weakest part of the myotendinous
unit. Eccentric contraction, in which the muscle is activated during
stretch, is known to be an important factor in the development of these
acute strain injuries. Traumatic incidents that result in active eccentric
muscle contraction, such as slipping into a splay-legged position, jumping
out of a vehicle, aggressive agility training, or roughhousing with other
dogs are often suspected in precipitating acute lameness. It is not
uncommon to find dogs with iliopsoas strains that have other concurrent
orthopedic problems, or that have recently undergone surgical treatment
for another orthopedic condition, such as cranial cruciate ligament
rupture. The iliopsoas muscle represents the fusion of the psoas major and
the iliacus muscles. The psoas major muscle arises from the transverse
processes of the lumbar vertebrae of the lower spinal column at L2 and L3
and the bodies of L4-7, and the iliacus arises from the ventral or lower
surface of the ilium or hipbone . The two muscles combine and have a
common insertion on the lesser trochanter of the femur. The action of the
iliopsoas muscle is to move the pelvic hind limb relative to the trunk via
hip flexion, primarily moving the pelvic hind limb forward. Ilium Int.
iliac fascia Ext. iliac fascia iliac lamina Inguinal ligament Iliopsoas m.
Femur © CINDY TELLEY Iliopsoas anatomy Diagnosis Agility dogs with
iliopsoas strains commonly present with a history of unilateral hind limb
weight-bearing lameness that is exacerbated with activity. These dogs
commonly demonstrate performance issues such as knocking bars with the
hind limbs and slowing in the weave poles. The tendon of insertion of the
iliopsoas can be palpated in a relaxed, friendly dog, where the femur
meets the pelvis, at the very bottom of the “V” formed when the dog is
lying on his back. Follow the femur down, as you palpate, down to the
center of the V. That will be the lesser trochanter of the femur. The
iliopsoas muscle is very deep, lying along the internal part of the ilium,
or the hipbone, in the pelvis. COURTESY OF SHERMAN CANAPP The therapist
locating/palpating the iliopsosas muscle-tendon unit along the inner
thigh. 67 March 07 | Clean Run Warning : Unknown : The session id contains invalid characters, valid
characters are only a-z, A-Z and 0-9 in Unknown on line 0 Warning :
Unknown : Failed to write session data files . Please verify that the
current setting of session.save_path is correct /var/lib/php/session in
Unknown on line 0

Clean Run Magazine - March 2007

Table of Contents for the Digital Edition of Clean Run Magazine - March 2007