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Scapular Deltiod

Mm attachment, nerve innervations, Mm function

QuestionAnswer
Motility Not usually involved in weight bearing.Spontaneous,often unconscious movement
Mobility Its stability is sacrificed to gain. Independent,purposeful movement
Quadrangular space Axillary nerve, Posterior humeral circumflex artery
Triangular interval Radial nerve, Deep brachial artery
Greater tubercle humeral avulsion fractures involves subscapularis, infraspinatus, supraspinatus
Humeral surgical neck fractures axillary nerve damage
Posterior humeral head dislocations UCL often torn, ulnar nerve injury, numbness of the little fingers and weakness of flexion and adduction of wrist
Deltoid flexes,abducts,extends,laterally, and medially rotates arm.
Teres major Adducts,medially rotates and extends arm
Supraspinatus Helps deltoid to abduct arm and acts with rotator cuff muscles
Infraspinatus Laterally rotate arm; Help to hold humeral head in glenoid cavity of scapula
Teres minor Laterally rotate arm; Help to hold humeral head in glenoid cavity of scapula
Subscapularis Medially rotates arm & adducts it; helps to hold humeral head in glenoid cavity
What nerve innervates teres minor? axillary nerve (C5, C6)
What nerve innervates deltoid? axillary nerve (C5, C6)
What nerve innervates teres major? lower subscapular nerve (C5, C6)
What nerve innervates supraspinatus? suprascapular nerve (C5, C6)
What nerve innervates infraspinatus? suprascapular nerve (C5, C6)
What nerve innervates subscapularis? upper and lower subscapular nerves (C5-C7)
What are the attachments of the Subscapularis? -Subscapular fossa -Lesser tubercle of humerus & joint capsule
What are the attachments of the Teres minor? -Superior part of lateral border of scapula -Inferior facet on greater tubercle of humerus & joint capsule
What are the attachments of the Infraspinatus? -Medial 2/3 of intraspinous fossa of scapula -Middle facet on greater tubercle of humerus & joint capsule
What are the attachments of the Supraspinatus? -Medial 2/3 of supraspinous fossa of scapula -Superior facet on greater tubercle of humerus & joint capsule
What are the attachments of the Teres major? -Dorsal surface of inferior angle of scapula -Medial lip of intertubular groove of humerus
What are the attachments of the Deltoid? -Lateral third of clavicle (anterior superior border, acromion (superior lateral surface), spine of scapula (posterior border, inferior edge)
Primary impingement Shape of acromion and clearance under coracoacromial arch, Thickness of supraspinatus and biceps brachii tendon, Repetitive overhead movement, Overstretching
Secondary impingement functional instability, flexibility of tendons and ligaments, muscle strength endurance, control
Created by: apage