Caudal muscles of buttocks

Question 1

Caudal muscles of buttocks

Answer 1

M. biceps femoris
M. abductor cruris caudalis
M. semitendinosus
M. semimembranosus

Question 2

M. biceps femoris

Answer 2

Origin: its cranial part on sacrotuberous ligament, caudal part on tuber ischiadicum

Insertion: by means of fascia lata and crural fascia to patella,patellar ligament, and tibial tuberosity and tibial crest, tuber calcanei by tendo accessorius.

Action: extends hip, and hock; its cranial part extends, caudal part flexes stifle

Question 3

M. abductor cruris caudalis

Answer 3

Origin: distal part of sacrotuberous ligament

Insertion: disappears in crural fascia on lateral side(it runs first medial, then lateral to m. biceps femoris)

Action: abducts hindlimb, flexes stifle

Question 4

M. semitendinosus

Answer 4

Origin: tuber ischiadicum
Insertion: tibialcrest(medially), and tuber calcanei by means of tendo accessorius
Action: extends hip, flexes stifle and extends hock

Question 5

M. semimembranosus

Answer 5

Origin: ventral aspect of tuber ischiadicum

Insertion: cranial belly distally on medial lip and medial condyle of femur,
caudal muscle belly on medial condyle of tibia (behind medial collateral ligament)
o Action: extends hip and flexes stifle joint

Question 6

M. abductor cruris caudalis

interspecies differences

Answer 6

• not present in eq, bo