Midterm Muscles Flashcards
What is the insertion of the cleidomastoideus (Brachiocephalicus)?
Mastoid process
What is the action of the cleidomastoideus (Brachiocephalicus)?
Unilateral: advances limb or turns head; Bilateral: flexes head and neck
What is the innervation of the cleidomastoideus (Brachiocephalicus)?
Accessory, axillary, and cervical nerves
What is the origin of the cleidobrachialis (Brachiocephalicus)?
Clavicular intersection
What is the insertion of the cleidobrachialis (Brachiocephalicus)?
Crest of humerus
What is the action of the cleidobrachialis (Brachiocephalicus)?
Unilateral: advances limb or turns head; Bilateral: flexes head and neck
What is the innervation of the cleidobrachialis (Brachiocephalicus)?
Accessory, axillary, and cervical nerves
What is the origin of the sternocephalicus?
Manubrium of sternum
What is the insertion of the sternocephalicus?
Ramus of mandible
What is the action of the sternocephalicus?
Unilateral: turns head and neck; Bilateral: flexes head and neck
What is the innervation of the sternocephalicus?
Ventral branch of accessory nerve
What is the origin of trapezius cervicis?
Funiculus nuchae
What is the insertion of trapezius cervicis?
Spine of scapula
What is the action of trapezius cervicis?
Elevate, advance scapula
What is the innervation of the trapezius cervicis?
Dorsal branch of accessory nerve
What is the origin of trapezius thoracis?
Supraspinous ligament
What is the insertion of the trapezius thoracis?
Spine of scapula
What is the action of the trapezius thoracis?
Elevate, retract scapula
What is the innervation of the trapezius thoracis?
Dorsal branch of accessory nerve
What is the origin of the gluteus medius?
Aponeurosis of Longissimus lumborum, ilium, and sacrosciatic ligament
What is the insertion of the gluteus medius?
Greater trochanter
What is the action of the gluteus medius?
Extend hip and abduct thigh
What is the innervation of the gluteus medius?
Cranial and caudal gluteal nerves
What is the origin of the biceps femoris?
Sacrum, sacrosciatic ligament, ischial tuber
What is the insertion of the biceps femoris?
Fascia late-patella, lateral patellar ligament, calcaneal tuber
What is the action of the biceps femoris?
Extend hip and abduct thigh
What is the innervation of the biceps femoris?
Caudal gluteal and sciatic nerves
What is the origin of the semitendinosus?
Cd 1-2 and ventral part of ischial tuber
What is the insertion of the semitendinosus?
Tibial crest, crural fascia, calcaneal tuber
What is the action of the semitendinosus?
Extend hip, flex stifle, extend hock
What is the innervation of the semitendinosus?
Caudal gluteal and sciatic nerves
What is the origin of the gracilis?
Subpelvic tendon (pelvic symphysis)
What is the insertion of the gracilis?
Medial patellar ligament and medial surface of tibia
What is the action of the gracilis?
Adduct limb
What is the innervation of the gracilis?
Obturator nerve
What is the origin of the rectus femoris (quadriceps femoris)?
Body of ilium
What is the action of the rectus femoris (quadriceps femoris)?
Flex hip, extend stifle
What is the origin of the vastus lateralis (quadriceps femoris)?
Lateral surface of femur
What is the action of the three “vastus” heads of the quadriceps femoris?
Extend the stifle joint
What is the insertion of all heads of the quadriceps femoris?
Tibial tuberosity
What is the innervation of all heads of the quadriceps femoris?
Femoral nerve
What is the origin of the vastus medialis (quadriceps femoris)?
Medial surface of femur
What is the origin of the vastus intermedius (quadriceps femoris)?
Cranial surface of femur
What is the origin of the tibialis cranialis?
Lateral condyle of tibia
What is the insertion of the tibialis cranialis?
Third metatarsal and tarsal bones I and II
What is the action of the tibialis cranialis?
Flex the hock joint
What is the innervation of the tibialis cranialis?
Deep peroneal nerve
What is the origin of the peroneus tertius?
Extensor fossa of femur
What is the insertion of the peroneus tertius?
Third metatarsal, third tarsal, calcaneus, and fourth tarsal bones
What is the action of the peroneus tertius?
Flex the hock when the stifle is flexed, extend stifle when tarsus extended
What is the innervation of the peroneus tertius?
Branches of deep peroneal nerve (sensory only)
What is the origin of the long digital extensor?
Extensor fossa of femur
What is the insertion of the long digital extensor?
Extensor process of third phalanx
What is the action of the long digital extensor?
Extend the stifle and digit and flex the hock
What is the innervation of the long digital extensor?
Deep peroneal nerve
What is the origin of the lateral digital extensor extensor?
Lateral collateral ligament of stifle joint and adjacent areas of tibia and fibula
What is the insertion of the lateral digital extensor?
Tendon of insertion of long digital extensor
What is the action of the lateral digital extensor?
Extend the digit and flex the hock
What is the innervation of the lateral digital extensor?
Superficial peroneal nerve
What is the origin of the gastrocnemius?
Supracondyloid tuberosity of femur
What is the insertion of the gastrocnemius?
Calcaneal tuberosity
What is the action of the gastrocnemius?
Flex the stifle joint and extend the hock
What is the innervation of the gastrocnemius?
Tibial nerve
What is the origin of the superficial digital flexor?
Supracondyloid fossa of femur
What is the insertion of the superficial digital flexor?
Calcaneal tuber, proximal extremity of second phalanx and distal extremity of first phalanx
What is the action of the superficial digital flexor?
Flex the digit and extend the hock, flex stifle
What is the innervation of the superficial digital flexor?
Tibial nerve
What is the origin of the deep digital flexor?
Lateral condyle and lateral border of tibia and fibula
What is the insertion of the deep digital flexor?
Flexor surface of third phalanx
What is the action of the deep digital flexor?
Flex the digit and extend the hock
What is the innervation of the deep digital flexor?
Tibial nerve
What is the origin of the interosseus (suspensory ligament)?
Distal row of tarsal bones, and proximal extremity of third metatarsal bone
What is the insertion of the interosseus (suspensory ligament)?
A axial surface of proximal sesamoids and conjoined tendon of insertion of the long and lateral digital extensors
What is the action of the interosseus (suspensory ligament)?
Support the fetlock (prevent overextension)
What is the innervation of the interosseus (suspensory ligament)?
Branches of tibial (sensory only)
What is the origin of the cleidomastoideus (Brachiocephalicus)?
Clavicular intersection