Muscles Flashcards
Biceps brachii origin
Supraglenoid tubercle
Biceps brachii insertion
Ulnar and radial tuberosities
Biceps brachii innervation
Musculocutaneous
Biceps brachii action
Flex elbow and extend shoulder
Triceps brachii origin
Long: caudal border of scapula
Lateral: tricipital line of humerus
Medial: crest of lesser tubercle
Accessory: neck of humerus
Triceps brachii insertion
Olecranon tuber
Triceps brachii innervation
Radial
Triceps brachii action
Long: flex shoulder and extend elbow
Lat/Med/Acc: extend elbow
Deltoideus origin
Spinous Head: spine of scapula
Acromial Head: acromial process
Deltoideus insertion
Deltoid tuberosity
Deltoideus Nerve
Axillary
Deltoideus action
Flex the shoulder
Pectorals origin
Superficial (descending and transverse): first two sternebrae
Deep (ascending): ventral sternum
Pectorals insertion
Superficial: crest of the greater tubercle
Deep: lesser tubercle and crest of the greater tubercle
Pectorals Nerve
Superficial: cranial pectoral
Deep: caudal pectoral
Pectorals action
Superficial: adduct Limb, prevent abduction when weight bearing
Deep: when supporting weight- pull trunk cranially and extend the shoulder, when not supporting weight- draw Limb caudally and flex shoulder, adduct limb
Quadriceps femoris origin
Rectus femoris: ilium, cranial to the acetabulum
Vastus intermedius: lateral side of the proximal end of femur
Vastus lateralis: proximal lateral part of caudal rough surface of femur
Vastus medialis: medial side of proximal end of the cranial surface and the proximal medial part of caudal rough surface of the femur
Quadriceps femoris insertion
Tibial tuberosity
Quadriceps femoris nerve
Femoral
Quadriceps femoris action
Rectus femoris: flexes the hip and extends the stifle
Vastus intermedius/lateralis/medialis: extends stifle
Sartorius origin
Cranial part: crest of the ilium and thoracolumbar fascia
Caudal part: cranial ventral iliac spine and the adjacent ventral border of the ileum
Sartorius insertion
Cranial: patella
Caudal: cranial border of the tibia
Sartorius nerve
Femoral
Sartorius action
Cranial: flex hip and extend stifle
Caudal: flexes hip and flexes stifle
Biceps femoris origin
Sacrotuberous ligament and ischiatic tuberosity
Biceps femoris insertion
Via fascia lata and the crural fascia to the patella, patellar ligament and the cranial border of the tibia, via the crural fascia to the subcutaneous part of the tibial body, the tuber calcanei
Biceps femoris nerve
Sciatic
Biceps femoris action
Extend the hip, stifle and hock, caudal part flexes the stifle
Gastrocnemius origin
Lateral and medial supracondylar tuberosities of the femur
Gastrocnemius insertion
Proximal dorsal surface of the tuber calcanei
Gastrocnemius nerve
Tibial
Gastrocnemius action
Flexes stifle and extends the tarsus
Cranial tibial origin
Extensor groove and the adjacent articular margin of the tibia, the lateral edge of the cranial tibial border
Cranial tibial insertion
Plantar surface of the base of metatarsals 1 and 2
Cranial tibial nerve
Fibular
Cranial tibial action
Flex the tarsocrural joint and rotates the paw laterally so that the plantar surface faces medially
Iliopsoas origin
Iliacus: cranioventral ilium
Psoas: lumbar vertebrae
Iliopsoas insertion
Lesser trochanter of the femur
Iliopsoas nerve
Ventral branches of the lumbar spinal nerves, femoral nerve
Iliopsoas action
Flexes the hip
Gracilis origin
Pelvic symphysis by means of the symphysial tendon
Gracilis insertion
Cranial border of the tibia and the tuber calcanei
Gracilis nerve
Obturator
Gracilis action
Adducts the limb, flexes the stifle, extends the hip and hock
Pectineus origin
Iliopubic eminence and the pubic tubercle via the prepubic tendon
Pectineus insertion
Distal end of the medial aspect of caudal rough face of the femur
Pectineus nerve
Obturator
Pectineus action
Adducts the limb