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Upper Arm and Back
origins, insertions, innervations, actions
63
Anatomy
Undergraduate 4
02/07/2009

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Term
Trapezius O:
Definition
External occupital protuberance, ligamentum nuchae, C7-T12 spinous processes
Term
Trapezius I:
Definition
U: lateral third of clavicle, acromion
M: Spine of scapula
L: Root of spine of scapula
Term
Trapezius N:
Definition
Accessory nerve (Cranial Nerve XI)
Branches of C3,4
Term
Latissimus Dorsi O:
Definition
Thoracolumbar aponeurosis, lower 6 thoracic spinous processes, sacrum and iliac crest, lower 3 to 4 ribs, inferior angle of scapula
Term
Latissimus Dorsi I:
Definition
Bicipital (Intertubercular) groove of humerus
Term
Latissimus Dorsi N:
Definition
Thoracodorsal nerve (C6,7,8)
Term
Teres Major O:
Definition
Inferior angle of scapula (dorsal surface); lower third of axillary border of scapula
Term
Teres Major I:
Definition
Medial lip of bicipital groove of humerus
Term
Teres Major N:
Definition
Lower subscapular nerve
Term
Teres Minor O:
Definition
Upper 2/3 of axillary border of scapula
Term
Teres Minor I:
Definition
Greater tubercle of humerus (inferior facet)
Term
Teres Minor N:
Definition
Axillary (circumflex) nerve (c5,6)
Term
Levator Scapula O:
Definition
C1-4 (transverse processes)
Term
Levator Scapula I:
Definition
Vertebral border of scapula from superior angle to root of spine
Term
Levator Scapula N:
Definition
Dorsal scapular nerve (C5) and branches of C3, 4
Term
Rhomboid major O:
Definition
T2-T5 (spinous processes)
Term
Rhomboid major I:
Definition
Vertebral border of scapula from root of spine to inferior angle
Term
Rhomboid major N:
Definition
Dorsal scapular nerve (C5)
Term
Rhomboid minor O:
Definition
C7-T1 (spinous processes)
Term
Rhomboid Minor I:
Definition
Root of spine of scapula
Term
Rhomboid Minor N:
Definition
Dorsal scapular nerve (C5)
Term
Supraspinatus O:
Definition
Supraspinous fossa of scapula
Term
Supraspinatus I:
Definition
Greater tubercle of humerus (superior facet)
Term
Supraspinatus N:
Definition
Suprascapular nerve (C5,6)
Term
Infraspinatus O:
Definition
Infraspinous fossa of scapula
Term
Infraspinatus I:
Definition
Greater tubercle of humerus (middle facet)
Term
Infraspinatus N:
Definition
Suprascapular nerve (C5,6)
Term
Subscapularis O:
Definition
Subscapular fossa of scapula
Term
Subscapularis I:
Definition
Lesser tubercle of humerus
Term
Subscapularis N:
Definition
Upper and lower subscapular nerve (C5,6)
Term
Pectoralis Major O:
Definition
Clavicular head: medial half of clavicle
Sternal head: sternum, cartilages of upper 6 ribs
Term
Pectoralis Major I:
Definition
Lateral lip of bicipital (intertubercular) groove of humerus
Term
Pectoralis Major N:
Definition
Clavicular head: lateral pectoral nerve (C5,6,7)
Sternal head: medial pectoral nerve (C8, T1)
Term
Pectoralis Minor O:
Definition
Anterior surface of ribs 3,4,5 near costal cartilages
Term
Pectoralis Minor I:
Definition
Coracoid process of scapula on medial border of superior surface
Term
Pectoralis Minor N:
Definition
Medial pectoral nerve (C8,T1)
Term
Subclavius O:
Definition
1st rib costocartilage junction
Term
Subclavius I:
Definition
Inferior shaft of clavicle- middle 1/3
Term
Subclavius N:
Definition
Nerve to subclavius (C5,6)
Term
Serratus Anterior O:
Definition
Outer surface of upper 8 ribs (by finger-like slips)
Term
Serratus Anterior I:
Definition
Vertebral border of scapula- anterior surface
Term
Serratus Anterior N:
Definition
Long thoracic nerve (C5,6,7)
Term
Coracobrachialis O:
Definition
Coracoid process of scapula
Term
Coracobrachialis I:
Definition
Middle 1/3 of medial surface of humeral shaft
Term
Coracobrachialis N:
Definition
Musculocutaneous nerve (C5,6,7)
Term
Deltoids O:
Definition
Anterior: lateral third of clavicle
Middle: lateral acromion
Posterior: spine of scapula
Term
Deltoids I:
Definition
Deltoid tuberosity of humerus
Term
Deltoids N:
Definition
Axillary nerve (circumflex) (C5,6)
Term
Triceps Brachii O:
Definition
Long head: infraglenoid tubercle of scapula
Lateral head: posterior humerus above spiral groove
Medial head: posterior humerus below spiral groove
Term
Triceps Brachii I:
Definition
Olecranon process of ulna
Term
Triceps Brachii N:
Definition
Radial nerve (C7,8)
Term
Anconeus O:
Definition
Lateral epicondyle of humerus
Term
Anconeus I:
Definition
Olecranon process and upper posterior surface of ulna
Term
Anconeus N:
Definition
Radial nerve (C7,8)
Term
Brachialis O:
Definition
Lower half of anterior shaft of humerus
Term
Brachialis I:
Definition
Tuberosity of ulna
Coronoid process of ulna
Term
Brachialis N:
Definition
Musculocutaneous nerve (C5,6,7) (sometimes branches from radial and median nerves)
Term
Biceps Brachii O:
Definition
Short head: coracoid process of scapula
Long head: supraglenoid tubercle of scapula
Term
Biceps Brachii I:
Definition
Tuberosity of radius
Bicipital aponeurosis
Term
Biceps Brachii N:
Definition
Musculocutaneous nerve (C5,6) and C7
Term
Brachioradialis O:
Definition
Lateral suprcondylar ridge of humerus
Term
Brachioradialis I:
Definition
Styloid process of radius
Term
Brachioradialis N:
Definition
Radial nerve (C5,6)
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