ANEQ 105 Muscles

Trapezius

Origin: neck and thorax

Insertion: scapula

Action: elevate the limb

sternomandibularis

origin: sternum

insertion: mandible

action: flexes neck and turns head

superficial pectoral

origin: sternum

insertion: humerus

action: adduct the limb

deep pectoral

origin: sternum

insertin: humerus

action: adduct and retract the limb (flex shoulder)

supraspinatus

origin: scapula

insertion: humerus

action: stabilize and extend shoulder joint

infraspinatus

origin: scapula

insertion: humerus

action: stabilize, flex, and extend shoulder joint

deltoideus

origin: scapula

insertion: humerus

action: flex the shoulder joint

biceps brachii

origin: scapula

insertion: radius

action: flex the elbow joint, extend shoulder joint

brachialis

origin: humerus

insertion: radius

action: flex the elbow joint

rhomboideus

origin: neck and thorax

insertion: scapula and scapular cartilage

action: elevate the limb

subscapularis

origin: scapula

insertion: humerus

action: adduct and extend shoulder joint

gluteus medius

origin: ilium

insertion: femur

action: extend hip joint and rotate limb

semimembranosus

origin: ischiatic tuberosity of os coxae

insertion: femur and tibia

action: extend hip joint, flex/extend stifle

sartorius

origin: ilium of the os coxae

insertion: patella and tibia

action: flex hip joint, flex/extend stifle

pectineus

origin: os coxae

insertion: femur

action: adduct the limb

adductor

origin: os coxae

insertion: femur

action: adduct limb, extend hip joint