Pelvic Limb - Origin, Termination, and Action by Muscle

Question 1

What are the origin, termination, and action of the superficial gluteal?

Answer 1

origin: sacrotuberous ligament
termination: third trochanter of femur
action: abduct pelvic limb

Question 2

What are the origin, termination, and action of the middle gluteal?

Answer 2

origin: gluteal surface of ilium
termination: greater trochanter
action: extend coxal joint and abduct limb

Question 3

What are the origin, termination, and action of the piriformis?

Answer 3

origin: sacrum and first caudal vertebra
termination: greater trochanter
action: extend coxal joint

Question 4

What are the origin, termination, and action of the deep gluteal?

Answer 4

origin: body of ilium and ischiatic spine
termination: greater trochanter
action: abduct limb and extend coxal joint

Question 5

What are the origin and termination of the external obturator?

Answer 5

origin: ventral aspect of os coxae around obturator foramen
termination: trochanteric fossa

Question 6

What are the origin and termination of the internal obturator?

Answer 6

origin: dorsal aspect of os coxae around obturator foramen
termination: trochanteric fossa

Question 7

What are the origin, termination, and action of the biceps femoris?

Answer 7

origin: ischiatic tuberosity and sacrotuberous ligament
termination: patella, tibia, and tuber calcanei
action: extend coxal joint, flex and extend genual joint, extend tarsocrural joint

Question 8

What are the origin, termination, and action of the semitendinosus?

Answer 8

origin: ischiatic tuberosity
termination: tiba and tuber calcanei
action: extend coxal joint, flex and extend genual joint, extend tarsocrural joint

Question 9

What are the origin, termination, and action of the semimembranosus?

Answer 9

origin: ischiatic tuberosity
termination: distal femur and proximal tibia
action: extend coxal joint, flex and extend genual joint

Question 10

What are the origin, termination, and action of the sartorius?

Answer 10

origin: crest of ilium
termination: medial aspect of genual region
action: flex coxal joint, extend genual joint (cranial head), flex genual joint (caudal head)

Question 11

What are the origin, termination, and action of the gracilis?

Answer 11

origin: pelvic symphysis
termination: medial aspect of genual region and tuber calcanei
action: adduct limb, extend coxal joint, flex genual joint, and extend tarsocrural joint

Question 12

What are the origin, termination, and action of the pectineus?

Answer 12

origin: iliopubic eminence
termination: distal body of femur
action: adduct limb

Question 13

What are the origin, termination, and action of the adductor?

Answer 13

origin: ventral surface of os coxae
termination: caudal surface of femur
action: adduct limb and extend coxal joint

Question 14

What are the four heads of the quadriceps femoris?

Answer 14

-rectus femoris
-vastus lateralis
-vastus intermedius
-vastus medialus

Question 15

What are the origin, termination, and action of the quadriceps femoris?

Answer 15

origin: ilium for rectus femoris, proximal femur for other three heads
termination: tibial tuberosity
action: extend genual joint, flex coxal joint for rectus femoris only

Question 16

What are the termination and action of the iliopsoas?

Answer 16

termination: lesser trochanter
action: flex coxal joint

Question 17

What are the origin, termination, and action of the cranial tibial?

Answer 17

origin: lateral aspect of proximal tibia
termination: plantar base of 1st and 2nd metatarsals
action: flex tarsocrural joint and rotate paw laterally

Question 18

What are the origin, termination, and action of the long digital exensor?

Answer 18

origin: extensor fossa of femur
termination: extensor processes of distal phalanges
action: extend genual joint, flex tarsocrural joint, extend digital joints

Question 19

What are the origin, termination, and action of the lateral digital extensor?

Answer 19

origin: proximal aspect of fibula
termination: lateral digits
action: flex tarsocrural joint, extend lateral-most digital joints

Question 20

What are the origin, termination, and action of the fibularis longus (peroneus longus)?

Answer 20

origin: lateral collateral ligament of genual joint
termination: fourth tarsal bone and plantar base of metatarsals
action: flex tarsocrural joint and rotate paw medially

Question 21

What are the origin, termination, and action of the gastrocnemius?

Answer 21

origin: distal caudal femur
termination: tuber calcanei
action: flex genual joint and extend tarsocrural joint

Question 22

What are the origin, termination, and action of the SDF?

Answer 22

origin: lateral supracondylar tuberosity of femur
termination: tuber calcanei and bases of middle phalanges
action: flex genual joint, extend tarsocrural joint, flex metatarsophalangeal and proximal interphalangeal joints

Question 23

What are the origin, termination, and action of the DDF?

Answer 23

origin: proximal caudal aspect of tibia and fibula
termination: flexor tubercles of distal phalanges
action: extend tarsocrural joint and flex digital joints

Question 24

What are the origin and action of the popliteus?

Answer 24

origin: popliteal fossa of femur
action: flex genual joint