Muscle OIAI

Question 1

Cleidomastoideus/Cleidobrachialis

Answer 1

O: Clavicular intersection
I: Mastoid process/Crest of humerus
A: Advance limb, turn head/neck (Bilateral: flex head/neck)
I: Accessory, Axillary, Cervical

Question 2

Sternocephalicus

Answer 2

O: Manubrium
I: Ramus of mandible
A: Turn head/neck (Bilateral: flex head/neck)
I: Accessory (ventral branch)

Question 3

Trapezius cervices/thoracis

Answer 3

O: Nuchal ligament (funincular part)/Supraspinous ligament)
I: Spine of scapula
A: Elevate, advance scapula
I: Accessory (dorsal branch)

Question 4

Gluteus medius

Answer 4

O: Aponeurosis of longissimus lumborum, ilium, sacrosciatic ligament
I: Greater trochanter
A: Extend hip, abduct thigh
I: Cranial and Caudal Gluteal

Question 5

Biceps femoris

Answer 5

O: Sacrum, sacrosciatic ligament, ischial tuber
I: Fascia lata-patella, Lateral patellar ligament, Calcaneal tuber
A: Extend hip and abduct thigh
I: Caudal Gluteal, Sciatic

Question 6

Semitendinosus

Answer 6

O: Ischial tuber, Cd 1-2
I: Tibial crest, crural fascia, calcaneal tuber
A: Extend hip. flex stifle, extend hock
I: Caudal Gluteal, Sciatic

Question 7

Gracilis

Answer 7

O: Pelvic symphysis
I: Medial patellar ligament, medial tibial surface
A: Adduct limb
I: Obturator

Question 8

Quads:
Rectus femoris
Vastus lateralis
Vastus medialis
Vastus intermedius

Answer 8

O: Body of ilium/lateral femoral surface/medial femoral surface/cranial femoral surface
I: Tibial tuberosity
A: Flex hip, extend stifle/extend stifle x3
I: Femoral

Question 9

Tibialis cranialis

Answer 9

O: Lateral condyle of tibia
I: Metatarsal 3, Tarsal bone 1 & 2
A: Flex hock
I: Deep Peroneal

Question 10

Peroneus tertius

Answer 10

O: Extensor groove (femur)
I: Metatarsal 3, Tarsal bones 3 & 4, Calcaneus
A: Extend stifle (hock extended), flex hock (stifle flexed)
I: Deep Peroneal (sensory)

Question 11

Long digital extensor/Lateral digital extensor

Answer 11

O: Lateral collateral ligament (stifle)
I: Tendon of insertion of long digital extensor
A: Extend digit, flex hock
I: Superficial Peroneal

Question 12

Gastrocnemius/Superficial digital flexor

Answer 12

O: Supracondylar fossa of femur
I: Calcaneal tuber, proximal extremity of 2nd phalynx, distal extremity of 1st phalynx
A: Flex digit, extend hock, flex stifle
I: Tibial

Question 13

Deep digital flexor

Answer 13

O: Lateral condyle and lateral border of the tibia and fibula
I: Flexor surface of the third phalynx
A: Flex the digit, extend the hock
I: Tibial

Question 14

Interosseus

Answer 14

O: Distal row of tarsal bones, proximal extremity of metatarsal 3
I: Abaxial surface of proximal sesamoids and conjoined tendon of insertion of the long and lateral digital extensor
A: Support fetlock (prevents overextension)
I: Tibial (sensory)