forelimb muscle functions Flashcards
superficial pectoral m.
weight bearing: prevent forelimb abduction
non-weight bearing: adduct forelimb
Deep pectoral m.
weight bearing: prevent forelimb abduction, draw trunk cranially
non-weight bearing: adduct forelimb, draw the forelimb caudally (flex shoulder joint)
Brachiocephalicus m.
weight bearing: draw head and neck to the side
non-weight bearing: advance the limb (extend shoulder joint)
Omotransversarius m.
weight bearing: draw the head and neck to the side
non-weight bearing: advance the forelimb
Trapezius m.
abduct forelimb, elevate forelimb during locomotion
Rhomboideus m.
draw scapula against trunk and elevate forelimb
Rhomboideus m.
draw scapula against trunk and elevate forelimb
Latissimus dorsi m.
weight bearing: draw trunk cranially
non-weight bearing: draw limb caudally (flex shoulder joint)
serrates ventralis m.
support trunk; antigravity
Deltoideus m.
flex the shoulder joint
Infraspinatus m.
weight bearing: lateral stabilizer of shoulder by acting as a lateral collateral ligament and preventing medial rotation of the humerus
non-weight bearing: lateral rotator and abductor of the humerus
Supraspinatus m.
weight bearing: prevent shoulder flexion; antigravity
non-weight bearing: extend shoulder joint (minor action)
Subscapularis m.
weight bearing: medial stabilizer of shoulder by acting as a medial collateral ligament and preventing lateral rotation of the humerus
non-weight bearing: medial rotator and adductor of the humerus
Teres major m.
flex shoulder join
Triceps brachii m.
weight bearing: prevent elbow flexion; antigravity
non-weight bearing: extend elbow joint and flex shoulder joint
