AOI's of Shoulder Anatomy
Action of Supraspinatus?
Abduction of Arm, acts w/ Rotator Cuff
Nerve Supply of Deltoid?
Axillary Nerve
Nerve Supply of Teres Minor?
Axillary Nerve
Blood Supply of Teres Major?
Circumflex Scapular Artery
Blood Supply of Teres Minor?
Circumflex Scapular Artery
Action of Deltoid?
Clavicular part: flexes and medially rotates arm Acromial part: abducts arm Spinal part: extends and laterally rotates arm
Insertion of Deltoid?
Deltoid tuberosity of humerus
Nerve Supply of Rhomboid Minor?
Dorsal Scapular Nerve
Blood Supply of Levator Scapulae?
Dorsal Scapular, Transverse Cervical, and Ascending Cervical
Action of the Trapezius?
Elevates, retracts, and rotates scapula; lower fibers depress scapula
Action of Latissimus Dorsi?
Extends, adducts, and medially rotates humerus at shoulder
Action of Rhomboid Major?
Fixes scapula to thoracic wall and retracts and rotates it to depress glenoid cavity
Action of Rhomboid Minor?
Fixes scapula to thoracic wall and retracts and rotates it to depress glenoid cavity
Insertion of Teres Minor?
Inferior facet of greater tubercle of humerus
Action of Subscapularis?
Internal rotation at shoulder and adduction. Helps hold humeral head in glenoid cavity.
Origin of Deltoid?
Lateral 1/3 of anterior clavicle, lateral acromion, inferior edge of scapular spoine
Insertion of Pec Major
Lateral lip of intertubercular sulcus of humerus
Insertion of Subscapularis?
Lesser Tubercles of Humerus
Origin of Rhomboid Minor?
Ligamentum nuchae and spinous processes C7-T1
Origin of Long Head of Biceps Brachii?
Long Head: Supraglenoid Tubercles of Scapula Short Head: Tip of Coracoid process of scapula
Nerve Supply of Teres Major?
Lower Subscapular Nerve
Nerve Supply of Pec Minor?
Medial Pectoral Nerve
Nerve Supply of Pec Major?
Medial and Lateral Pectoral N
Insertion of Rhomboid Major?
Medial border of scapula below base of spine of scapula
Action of Levator Scapulae?
Medial elevation of scapula, Rotation of glenoid cavity inferiorly
Insertion of Teres Major?
Medial lip of intertubercular sulcus of humerus
Insertion of Infraspinatus?
Middle facet of greater tubercle of humerus
Blood Supply of Long Head of Biceps Brachii?
Muscular Branches of Brachial Artery
Nerve Supply of Long Head of Biceps Brachii?
Musculocutaneous Nerve (C5-6)
Origin of Pec Minor?
Outer surface of upper margins of ribs 3-5
Blood Supply of Deltoid?
Posterior circumflex humeral artery, deltoid branch of thoracoacromial artery
Origin of Teres Major?
Posterior surface of inferior angle of scapula
Origin of Levator scapulae?
Posterior tubercles of transverse processes of C1-C4 vertebrae
Action of Pec Minor?
Protracts lower lateral angle of scapula
Action of Serratus Anterior?
Protracts scapula and holds it against thoracic wall; rotates scapula
Insertion of Long Head of Biceps Brachii?
Radial Tuberosity fasica of forearm via bicipital aponeurosis
Origin of Latissimus Dorsi?
Spinous Process of T7-L5; Thoracolumbar Fascia, Iliac Crest, Last 3 Ribs
Origin of Rhomboid Major?
Spinous process of T2-T5
Origin of Pectoralis Major?
Sternal 1/2 of clavicle; Sternum to 7th Rib cartilages of true ribs, aponeurosis of external oblique
Blood Supply of Subscapularis?
Subscapular Artery and Lateral Thoracic artery
Origin of Subscapularis?
Subscapular Fossa
Insertion of Supraspinatus?
Superior Facet of Greater tubercle of Humerus
Origin of the Trapezius?
Superior nuchal line, external occipital protuberance, nuchal ligament, spinous processes of C7-T12
Blood Supply Supraspinatus?
Suprascapular Artery
Blood supply of Supraspinatus?
Suprascapular Artery
Nerve Supply of Supraspinatus?
Suprascapular Nerve
Origin of Suprispinatus?
Supraspinatus fossa and deep fascia
Nerve Supply of Latissimus Dorsi?
Thoracodorsal Nerve
Blood Supply of Latissimus Dorsi?
Thoracodorsal, Dorsal branches of 9-11th posterior intercostal, Subcostal and 1st 3 Lumbar Arteries
Blood Supply of the Trapezius?
Transverse cervical artery, dorsal perforating branches of posterior intercostal arteries
Which muscles are involved in scapular rotation?
Trapezius, Serratus Anterior, Levator Scap, and Rhomboid Major and Minor
Nerve supply of Subscapularis?
Upper and Lower Subscapular Nerve
Nerve Supply of Levator Scapulae?
Ventral Rami of C3-4; Dorsal Scapular Nerve
Action of Teres Major?
adducts and medially rotates arm
Insertion of Pec Minor?
coracoid process of scapula
Insertion of the Serratus Anterior?
costal surface of the medial border of scapula
Blood Supply of Rhomboid Major?
dorsal scapular artery
Blood Supply of Rhomboid Minor?
dorsal scapular artery
Nerve Supply of Rhomboid Major?
dorsal scapular nerve
Action of Infraspinatus?
external rotation of humerus
Action of Long Head of Biceps Brachii?
flexes elbow joint and supinates forearm
Action of Pec Major?
flexes, adducts, and medially rotates arm
Origin of Infraspinatus?
infraspinous fossa of scapula and deep fascia
Insertion of Latissimus Dorsi?
intertubercular sulcus of humerus
Insertion of the Trapezius?
lateral 1/3 of clavicle, acromion, spine of scapula
Blood Supply of Serratus Anterior?
lateral thoracic artery
Action of Teres Minor?
laterally rotates arm
Nerve Supply of Serratus Anterior?
long thoracic nerve
Insertion of Rhomboid Minor?
medial border of scapula at scapular spine
Insertion of Levator Scapulae?
medial border of scapula superior to spine
Blood Supply of Pec Major?
pectoral branch of thoracoacromial and intercostal lateral thoracic arteries
Blood Supply of Pec Minor?
pectoral branch of thoracoacromial and intercostal lateral thoracic arteries
Origin of the Serratus Anterior?
ribs 1-8
Nerve Supply of Trapezius?
spinal accessory nerve (cranial nerve XI)
Nerve Supply of Infraspinatus?
suprascapular nerve
Origin of Teres Minor?
upper 2/3 of posterior surface of lateral border of scapula
