Muscles Flashcards
Sacrotuberous Ligament
O: Caudolateral apex of the sacrum and the transverse process of the caudal vertebrae 1
I: Lateral angle of ischiadic tuberosity
F: Site of anchorage for gluteal muscles and biceps femoris
Quadratus Lumborum
O: Vertebral bodies of thoracic vertebrae 11, 12, 13, transverse processes of all lumbar vertebrae and last two ribs
I: Medial surface of the wing of the ilium between articular surface and the cranial ventral iliac spine
A: Flexion and fixation of the vertebral column
Psoas Minor
O: Ventral surface of the last thoracic and first 4 - 5 lumbar vertebrae
I: Via a long tendon into the iliopubic eminence
A: Flexion of the vertebral column and pelvis against the thigh
Iliopsoas
O: Transverse process of lumbar vertebrae 2 - 3 and the ventral surface of lumbar 4 - 7 and the ventral surface of the ilium between the arcuate line and the lateral border
I: Lesser trochanter of the femur
A: Flexion of the hip joint
Tensor Fascia Latae
O: Coxal tuber and the aponeurosis of gluteus medius
I: Inserts into and contributes to the lateral femoral fascia
A: Flexion of the hip, abduction of the limb and extension of the stifle (via tensing of the lateral fascia)
Superficial Gluteal
O: Cranially from the sacral tuber and the gluteal fascia
Caudally from the sacrotuberous ligament and the lateral aspect of the sacrum and caudal vertebrae 1
I: Distal aspect of the greater trochanter of the femur
A: Extension of the hip joint
Medial Gluteal
O: Gluteal surface of ilium, iliac crest and sacral tuber
I: Greater trochanter of femur
A: Extension of the hip, medial rotation of hip and prevention of lateral rotation under weight bearing.
Deep Gluteal
O: Ilium near ischiadic spine
I: Cranial aspect of the greater trochanter
A: Extension of hip, abducts the limb, medial rotation of the hip
Piriformis
O: Lateral surface of the third sacral and caudal vertebra 1, sacrotuberous ligament
I: Greater trochanter of femur
A: Extension of the hip
Obturator Internus
O: Pelvic surface of pubis and ischium medial to obturator foramen
I: Trochanteric fossa
A: Lateral rotation of the thigh
Obturator Externus
O: Ventral surface of pelvis adjacent to pubic symphysis
I: Trochanteric fossa
A: Lateral rotation of thigh
Gemelli
O: Lateral surface of ramus of ischium
I: Trochanteric fossa
A: Lateral rotation of thigh
Quadratus Femoris
O: Ventral surface of ischium
I: Intertrochanteric crest
A: Lateral rotation of thigh
Pectineus
O: Iliopubic eminence of pubis and pubic tubercle via the republic tendon
I: Distal end of the medial lip of the caudal rough face of the femur
A: Adduction of the thigh at the hip
Adductor
O: Pubic tubercle and entire pelvic symphysis
I: Entire lateral lip and caudal surface of femur
A: Adduction of the limb and extension at the hip
Gracilis
O: Pelvic symphysis via the symphyseal tendon
I: Entire cranial border of the tibia and spreads out into the crural fascia forming a band to the common calcaneal tendon
A: Adduction of the limb, extension of the hip, flexion of the stifle, extension of the tarsus
Sartorius
O: CRANIAL - iliac crest and cranial ventral iliac spine
CAUDAL - Ridge between the ventral iliac spines
I: CRANIAL - Medial femoral fascia, proximal to the patella
CAUDAL - Fuses with gracilis in the crural fascia before inserting onto the cranial border of the tibia
A: Flexes the hip and thigh, adducts the thigh and extends the stifle
Rectus Femoris
O: Body of the ilium, cranial to the acetabulum
I: Via patellar ligament to the tibial tuberosity
A: Flexion of the hip and extension of the stifle via common insertion to quadriceps tendon
Vastus Lateralis
O: Craniolateral part of the proximal 1/5th of the femur
I: Via patellar ligament to the tibial tuberosity, unites with joint capsule
A: Extension of the stifle via common insertion to quadriceps tendon
Vastus Medialis
O: Proximal part of the medial lip of the femur and in the upper craniomedial 1/5th of the femur
I: Patella, tibial tuberosity
A: Extension of stifle
Vastus Intermedius
O: With vastus laterals and proximolateral part of femur
I: Vastus medialis and quadriceps tendon
A: All four muscles extend the stifle via their common insertion into the quadriceps tendon
Biceps Femoris
O: CRANIAL - Ventrocaudal end of the sacrotuberous ligament and ischial tuberosity
CAUDAL - Ischial tuberosity
I: CRANIAL - Via an aponeurosis to the fascia lata and fascia crura, to patella ligament and tibial tuberosity
CAUDAL - Via and aponeurosis to the fascia lata and fascia crura to insert on the tibial crest and then continues distally to contribute to the common calcanea tendon
A: CRANIAL - Extend the hip and weakly extend the stifle
CAUDAL - Flex the stifle and extend the tarsus
BOTH - Abduct and extend the entire hindlimb
Semitendinosus
O: Ischial tuberosity
I: Crural fascia, medial and cranial surface of tibia. Unites with tendon of Gracilis to the calcanea tuberosity and contributes to the common calcaneal tendon
A: Extension at the hip and tarsus. Main flexor of stifle when limb is off the ground.
Semimembranosus
O: Ischial tuberosity
I: CRANIAL - medial condyle and medial lip of femur
CAUDAL - Medial condyle of tibia under the medial collateral ligament
A: CRANIAL - purely hip extender
CAUDAL - extends the hip and flexes the stifle
Cranial Tibial
O: Medial to the extensor groove and lateral edge of the cranial border of the tibia
I: Base of metatarsals 1 and 2 on the plantar surface
A: Flexion at the tarsus and lateral rotation of the paw
Fibularis Longus
O: Lateral condyle of the tibia, lateral collateral ligament and head of fibula
I: 4th tarsal bone and plantar surfaces of all metatarsals
A: Flex the tarsus
Fibularis Brevis
O: Lateral surface of distal 2/3rd of fibula and tibia
I: Proximal end of metatarsal V
A: Flex the tarsus