Origins, Actions, Insertions, Nerve Supply Flashcards
Brachiocephalicus
Cleidomastoideus/cleidobrachialis
O: Clavicular intersection
I: mastoid process/ crest of humerus
A: Unilateral: advances limb or turns head. Bilateral: flexes head and neck
N: accessory, axillary, and cervical nerves
Sternocephalicus
O: Manubrium of sternum
I: Ramus of mandible
A: unilateral- turns headand neck, Bilateral- flexes head and neck
N: ventral branch of accessory
Trapezius
Cervicis/ thoracis
O: funiculus nuchae/ supraspinous ligament
I: Spine of scapula
A: elevate and advance scapula, elevate and retract scapula
N: Dorsal branch of the accessory
Gluteus Medius
O: aponeurosis of longiss. Lumborum, ilium and sarcosciatic ligament
I: greater trochanter
A: extend hip and abduct thigh
N: cranial and caudal gluteal n.
Biceps Femoris
O: sacrum, sarcosciatic ligament, Ischiatic tuber
I: fascia lata-patella, lat. patellar ligament, Calcaneal tuber
A: Extend hip and abduct thigh
N: caudal gluteal and sciatic
Semitendinosus
O: Cd 1-2 and ventral part of Ischiatic tuber
I: tibial crest, Crural fascia, calcaneal tuber
A: extend hip, flex stifle, extend hock
Gracilis
O: subpelvic tendon (pelvic symphysis)
I: medial patellar ligament and medial surface of tibia
A: Adduct limb
N: Obturator n.
Tibialis Cranialis
O: lateral condyle of tibia
I: third metatarsal and tarsal bones I and II
A: flex the hock
N: deep perineal
Peroneus Tertius
O: Extensor fossa of femur
I: third metatarsal, third tarsal, calcaneus, and fourth tarsal
A: flex hock when stifle flexed, extend stifle when tarsus extended
N: branches of deep peroneal (sensory only)
Long Digital Extensor
O: extensor fossa of femur
I: extensor process of third phalynx
A: extend the stifle and digit and flex hock
N: deep peroneal
Lateral Digital Extensor
O: lateral collateral ligament of stifle joint and adjacent areas of tibia and fibula
I: tendon of insertion of long digital extensor
N: superficial peroneal
Gastrocnemius
O: Supracondyloid tuberosity of femur
I: calcaneal tuberosity
A: flex the stifle joint and extend the hock
N: Tibial n.
Superficial Digital flexor
O: supracondyloid fossa of femur
I: calcaneal tuber, proximal extremity of 2nd phalynx and distal extremity of first phalynx
A: flex the digit and extend the hock, flex stifle
N: tibial n.
Deep digital flexor
O: lateral condyle and lateral border of tibia and fibula
I: flexor surface of third phalynx
A: flex the digit and extend the hock
N: tibial n.
Interosseus (suspension lig.)
O: distal row of tarsal bones and proximal extremity of third metatarsal bone
I: abaxial surface of proximal sesamoids and conjoined tendon of insertion of the long and lateral digital extensor mm.
A: support the fetlock (prevent overextension)
N: branches of tibial (sensory only)
