Pelvic Limb Flashcards
What cause intrinsic/ passive stability of the lumbar spine?
Ligaments
Facets
Discs
What cause extrinsic/ active stability of the lumbar spine?
Core muscles
What is spinal arthritis and what can occur secondary to this?
Degenerative joint disease of articular facets
- Cause bony and soft tissue proliferation
- Can result in spinal cord compression and pain
- ROM decreases
- Can cause muscle spasms
- Decreases performance in working dogs
What does spondylosis occur?
- New bone is laid down when hypermobility occurs in a joint
What type of IVDD occurs with lumbosacral instability?
Type II
What is the pathway of force transfer from the hind limb to the lower back
Limb –> sacrum –> L7
What is the weight-bearing axis of the pelvis?
Acetabulum
Ilial body
SI joint
Sacrum
In what direction do sacroiliac luxations occur? When is surgical correction indicated?
Craniodorsal
When significant displacement or neuro deficits are noted
What is an uncommon sequelae to femur fractures in young dogs?
Quadriceps contracture
Occurs when blood supply to fracture increases, surrounding quadriceps mm becomes enveloped in callous and fibrous tissue
Usually occurs secondary to long-term coaptation or soft tissue trauma
What parts of the leg are affected by quadriceps contracture? Is this extended or flexed?
Rigid extension of stifle and tarsus
Leg cannot be flexed due to muscles becoming fibrotic and contracted
What surgical treatment options are used for quadriceps contracture?
Z-plasy - lengthens quadriceps tendon
What is the long-term prognosis with QC
- Guarded
- Early intervention is best option for good prognosis
What is a muscle strain?
Contraction of the muscle when it is elongated
What is a grade 1 muscle strain
Few fibers are disrupted
- E.G hematoma
What is a grade 3 muscle strain?
Muscle is completely ruptured
Why do you not want scar tissue to form with muscle strains?
- Predisposition to future injury (scar tissue is weak)
- Muscle strength decreases ~ 50 %
What is the difference between strain and sprain?
- Strain occurs with muscles and tendons
- Sprains occur with ligaments
What soft tissue structures are most at risk of injury?
- Those crossing multiple joints
- Occurs at myotendinous junction
- Most common are hip flexors, adductors, and hamstrings
What types of treatments/ rehab are needed for muscle injury?
- Rest and immobilization for 3-5 days, include ice and NSAIDs
- Controlled remobilization for 4-6 weeks
- Reduce scar tissue with manual therapy
What is a common cause of iliopsoas strain?
Secondary to sporting injury
What muscles are involved with fibrotic myopathy?
Gracilis and semitendinous
What is the common presentation for fibrotic myopathy?
- GSD/ Belgian Shepherds
- ~5 YO
- 80 % male
- 25 % bilateral
What is the appearance of the gait with fibrotic myopathy?
- Shortened stride
How is the hind limb positioned with fibrotic myopathy?
- Rapid, elastic internal rotation of paw
- Extenral rotation of tuber calcani
- Internal rotation of stilfe during middle and late swing phase
- Best visualized behind dog
What region of the muscle is painful on palpation with fibrotic myopathy?
Insertion
What are the stabilizers of the tarsus?
Joint congruity
Collateral ligaments
Plantar fibrocartilage
Where is osteochondrosis dissecans commonly seen in the hock?
Medial aspect of the talus
Palpates as firm swelling of the calcaneus
What muscles make up the Achilles tendon
Gastrocnemius Biceps femoris Semitendinosis Gracillis Superficial digital flexor
What is the function of the common calcanean tendon
Tarsal extension and stifle flexion
Also used in cranial tibial thrust
What breeds are most commonly affected with gastroc avulsion?
Labs and dobermans
What PE findings are noted with partial Achilles ruptures?
Extended stifle
Flexed hock
Flexed digits (secondary to stretch of the superficial digital flexor tendons)
How are partial Achilles Tendon tears diagnosed? Treated
Dx: U/S
Tr: ESWT
- Coaptation
What PE findings are noted with complete tear of Achilles tendon?
Plantigrade stance
- Needs to be surgically corrected