Term
muscles of shoulder
intrinsic
anterior thorax
posterior thorax
small anterior arm |
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Definition
deltoid, subscapularis, supraspinatus, infraspinatus, teres major, teres minor
pectorals major
latissimus dorsi
coracobrachialis
**all of the muscles cross the shoulder joint that insert on the humerus |
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Term
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Definition
O- clavicle, sternum, ribs 1-6 (cartilage), aponeurosis of external oblique muscle
I- intertubercular sulcus of humerus
N- lateral and medial pectoral nerves
A- flexes, adducts, rotates arm medially
forms anterior wall of the axilla |
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Term
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Definition
O- lumbodorsal fascia; spinous processes of T7- 12 and lumbar vertebrae, iliac crest and inferior angle of scapula
I- intertubercular groove of humerus
N- thoracodorsal nerve
A- extension of humerus, powerful adductor, medial rotator of arm, depresses shoulder (used in climbing and swimming)
forms posterior axillary fold |
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Term
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Definition
O- lateral 1/3 of clavicle, acromion and spine of scapula
I- deltoid tuberosity of humerus
N- axillary nerve
A- abduction of arm, all fibers; anterior fibers flex and medially rotate arm, synergist with pectorals major, (posterior fibers) extend and laterally rotate arm
intermuscular injection
stabilize shoulder joint and hold head of humerus in glenoid cavity during shoulder movement |
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Term
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Definition
O-subscapular fossa of scapula
I-lesser tubercle of humerus
N- subscauplar nerves (upper and lower)
A- major medial rotator of humerus helps in adduction
rotator cuff muscle, hold head of humerus in glenoid cavity |
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Term
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Definition
subscapularis
*supraspinatus
*infraspinatus
*teres minor
*three muscles insert on the greater tubercle of the humerus
subscapularis inserts on the lesser tubercle |
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Term
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Definition
O- supraspinous fossa of scapula
I- superior part of greater tubercle of humerus
N- suprascapular nerve
A- abducts arm; stabilizes shoulder joint and helps to prevent downward dislocation of humerus
initiation of arm abduction, after 15 degrees deltoid becomes effective |
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Term
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Definition
O-infraspinous fossa of scapulas
I- greater tubercle of hummers, posterior to supraspinatus insertion
N- suprascapular nerve
A- rotates arm laterally, aids in holding head of humerus in glenoid cavity |
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Term
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Definition
O- lateral border of dorsal scapular surface
I- greater tubercle of hummers, inferior to infraspinatus insertion
N- axillary nerve
A- rotates arm laterally, aids in holding head of hummers in glenoid cavity (same as infraspinatus); aids in adduction of arm |
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Term
| which rotator cuff muscle is the exception for rotation the humerus and what is its action |
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Definition
| supraspinatus- INITIATES ABDUCTION |
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Term
rotator cuff muscles actions
supraspinatus
infraspinatus
teres minor
subscapularis |
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Definition
initiates abduction
lateral rotator
lateral rotat
medial/primary rotatr
all of the RCM tonic contraction to hold humor head in glen. cavity
supraspinatus is most commonly injured |
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Term
| trees major and minor have different: |
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Definition
| have different nerve supplies and actions |
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Term
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Definition
| supraspinatus, infraspintaus, teres minor SIT on the greater tubercle from anterior to posterior |
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Term
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Definition
o- posterior surface of scapula at inferior angle
I- intertubercular sulcus of humerus, tendon fused with tendon of latissimus dorsi
N- lower subscapular nerve
A- adducts, extends, rotates arm medially, synergist with latissimus dorsi
usually called "latissiums dross's little helper"
holds head of hummers in place against pull of deltoid |
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Term
| Three muscles insert into the intertubercular sulcus/groove of the humerus |
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Definition
most lateral- pectorals major,
latissimus dorsi
most medial- teres major |
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Term
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Definition
O- coracoid process of scapula
I- medial surface of humerus shaft, opposite deltoid tubercle
N- musculocutaneous nerve
A- flexes and adducts arm, synergist with pectorals major
often fused superiorly with the short head of bides brachii |
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Term
Should joint fundamental movement
flexion |
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Definition
pectorals major
deltoid (anterior fiber)
coracobrachialis
biceps brachii |
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Term
Should joint fundamental movement
extension |
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Definition
lat dorsi
deltoid posterior fibers
trees major |
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Term
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Definition
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Term
Should joint fundamental movement
adduction |
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Definition
pectorals major
lat dorsi
teres minor
trees major
coracobrachialis
tricpes brachii (long head) |
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Term
Should joint fundamental movement
Lateral rotation |
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Definition
infraspinatus
teres minor
deltoid posterior fibers |
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Term
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Definition
subscapularis
lat dorsi
pectorals major
deltoid anterior fiber
teres major |
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