Lecture 5 - Muscles Flashcards
What is the origin of supraspinatus?
supraspinanous fossa of scapula
What is the insertion of supraspinatus?
Greater tubercle of humerus
What is the nerve of supraspinatus?
Suprascapular n.
What is the action of supraspinatus?
Extend and laterally stabilize the shoulder joint
What is the origin of infraspinatus?
Infraspinous fossa of scapula
What is the insertion of infraspinatus?
lateral side of the greater tuberble of humerus
What is the nerve of infraspinatus?
Suprascapular n.
What is the action of infraspinatus?
Extend and laterally stabilize or flex the GH joint, abduct the shoulder, rotate shoulder laterally, lateral stability to shoulder joint
What does the infraspinatus do when the leg is weight bearing?
Prevents medial rotation
What is the origin of the scapular part?
Spine of scapula
What is the origin of the acromial part?
Acromion of scapula
What is the insertion of the deltoideus?
Deltoid tuberosity of humerus
What is the nerve of the deltoideus?
Axillary n.
What is the action of the deltoideus?
Flex the shoulder joint
What is the origin of the teres major?
caudal angle and adjacent caudal border of scapula, caudal surface of subscapularis
What is the insertion of the teres major?
Teres major tuberosity of the humerus
What is the nerve of the teres major?
Axillary n.
What is the action of the teres major?
Flex shoulder joint, rotate shoulder medially, and prevent lateral rotation when bearing weight
What is the origin of the teres minor?
infraglenoid tubercle and dorsal third of caudal border of scapula
What is the insertion of the teres minor?
teres minor tuberosity of humerus
What is the nerve of the teres minor?
axillary n.
What is the action of the teres minor?
Flex shoulder joint, rotate shoulder laterally, and prevent medial rotation when weight bearing
What is the origin of the subscapularis?
subscapular fossa of scapula
What is the insertion of the subscapularis?
lesser tubercle of humerus
