kines ch 5

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Supraspinatus responsible for what movements? (1)

- abduction

which muscles form rotator cuff

- subscapularis - supraspinatus - infraspinatus - teres minor muscles

______ responsible for stabilization of humeral head in glenoid fossa (4)

- subscapularis muscle -supraspinatus muscle -infraspinatus -teres minor

Agonists of Glenohumeral flexion

-Anterior deltoid - upper pectoralis major

Agonists of glenohumeral abduction

-Deltoid -supraspinatus -upper pectoralis major

Teres major muscle responsible for what movements (3)

-Extension -internal rotation -adduction

coraccobrachialis muscle responsible for (3)

-Flexion -adduction -horizontal adduction

posterior muscles pertaining to shoulder joint (4)

-Latisimus Dorsi -Teres major -Infraspinatus -Teres minor

Agonists of Glenohumeral extension

-Teres major -Latisimus Dorsi -Lower pectoralis major

latisimus dorsi muscles responsible for what movements (4)

-adduction -extension -internal rotation -horizontal abduction

what bones serve as attachments for shoulder joint muscles (3)

-clavicle -scapula -humerus

superior muscles pertaining to shoulder joint (2)

-deltoid -supraspinatus

Humeral abduction and extension results in scapula (3)

-depression -downward rotation -adduction

Humeral flexion & abduction require scapula (3)

-elevation -upward rotation -abduction

Scapula adduction occurs with humeral (2)

-external rotation -horizonal abduction

3 movements of Infraspinatus muscle

-external rotation -horizontal abduction -extension

3 movements of teres minor

-external rotation -horizontal abduction -extension

_____ attaches to greater tubercle posteriorly (external rotation) (2)

-infraspinatus - Teres minor

agonists of glenohumeral extension

-infraspinatus -teres minor

subscapularis responsible for what movements? (3)

-internal rotation -adduction -extension

Scapula abduction occurs with humeral (2)

-internal rotation -horizontal adduction

pectoralis major muscle responsible for what movements (5)

-internal rotation -horizontal adduction -abduction -adduction -extension

______ inserts on medial lip of intertubecular groove of humerus (2)

-latisimus dorsi -teres major

Agonists responsible for glenohumeral internal rotation

-latisimus dorsi -teres major -subscapularis -pectoralis major

Agonists of glenohumeral adduction

-lattisimus dorsi - teres major -lower pectoralis major

Common instability problems in the shoulder joint include (2)

-rotator cuff impingment -subluxations & dislocations

anterior muscles pertaining to shoulder joint (3)

-serratus anterior -coraccobrachialis -subscapularis

_______ originates on entire anterior surface of sub scapular fossa

-subscapularis

Upward lateral movement of humerus out to the side, away from body

Abduction

Horizontal adduction at shoulder joint causes shoulder girdle

Abduction (protraction)

Horizontal abduction at shoulder joint causes shoulder girdle

Adduction (retraction)

agonists of diagonal adduction

Anterior Deltoid Coracobrachialis Biceps Brachii (short head) Pectoralis Major - Upper & Lower

agonists of horizontal adduction

Anterior Deltoid Pectoralis Major Coracobrachialis

Intrinsic glenohumeral muscles are

Deltoid, Coraccobrachialis, Teres major

movement of humerus in a diagonal plane away from midline of body

Diagonal abduction

movement of humerus in a diagonal plane toward midline of body

Diagonal adduction

movement of humerus laterally around its long axis away from midline

External rotation

difference in internal rotation range of motion between an individual's throwing & non-throwing shoulders defines

GIRD

Generally accepted scapulohumeral rhythm

Generally accepted ratio is 2 to 1 or for every 2 degrees of glenohumeral motion, there is 1 degree of scapular motion

GIRD stands for

Glenohumeral Internal Rotation Deficit

movement of humerus in a horizontal or transverse plane away from the chest

Horizontal abduction (transverse extension)

movement of humerus in a horizontal or transverse plane toward & across chest

Horizontal adduction (transverse flexion)

movement of humerus medially around its long axis toward midline

Internal rotation

agonists of diagonal abduction

Posterior Deltoid Infraspinatus Teres Minor Triceps Brachii (Long Head)

agonists of glenohumeral abduction

Posterior Deltoid Middle Deltoid Infraspinatus Teres Minor

Shoulder joint extension= what movement at shoulder girdle

Shoulder girdle depression/ downward rotation

Shoulder joint flexion= what movement at shoulder girdle

Shoulder girdle elevation/upward rotation

_____ attaches to lesser tubercle anteriorly (internal rotation)

Subscapularis

_____ originates on inferior third of lateral border of scapula

Teres major

The shoulder joint is attached to axial skeleton via

The clavicle at the SC joint

Shoulder joint abduction= Shoulder girdle ___

Upward rotation

are anterior or anteroinferior glenohumeral subluxations & dislocations common?

Yes

downward movement of humerus medially toward body from abduction

adduction

then glenohumeral joint is frequently injured due to

anatomical design

The latisimus dorsi, teres major, subscapularis, and pec major all attach _____ on humerus

anteromedially

Intrinsic glenohumeral muscles originate on

claivcle and scapula

_____ inserts of deltoid tuberosity of lateral humerus

deltoid muscle

_______ originates on anterior lateral third of clavicle, lateral of acromion, spine of scapula

deltoid muscle

shoulder joint adduction= shoulder girdle______

downward rotation

Why is determining exact range of each movement difficult

due to accompanying shoulder girdle movement

the glenohumeral joint can be classified as

enarthrodial

movement of humerus straight posteriorly

extension

Ligaments are quite lax until

extreme ranges of motion are reached due to wide range of motion involved

latissimus dorsi & pectoralis major are what type of glenohumeral muscles?

extrinsic glenohumeral muscles

movement of humerus straight anteriorly

flexion

rotator cuff attaches to

front, top, and rear of humeral head

Infraspinatus attaches posteriorly on

greater tubercle

teres minor attaches posteriorly on

greater tubercle

______ inserts on

greater tubercle of humerus on posterior side

Scapula movement usually occurs with movement of

humerus

_______ inserts of greater tubercle of posterior side

infraspinatus

_______ originates on posterior surface of scapula below spine

infraspinatus

an exercise that is an example of glenohumeral adduction

lat pull down with weights

______ originates of posterior crest of illium, back of sacrum, and spinous processess of lumbar and lower six thoracic vertebrae,

latisimus dorsi

the more stable a joint is the less

mobile it is

stability is sacrificed to gain

mobility

The glenohumeral joint is what type of joint

multi-axial ball and socket joint

are posterior dislocations common?

no they are rare

_____ originates on medial half of anterior surface of clavicle, anterior surfaces of costal cartilages of first six ribs, adjoining portion of sternum

pectoral major

______ inserts of flat tendon 2 to 3 inches wide to outer lip of intertubecular groove of humerus

pectoralis major

does the glenohumeral joint have anterior or posterior instability problems

posterior instability problems

Shoulder joint internal rotation= what movement at shoulder girdle

shoulder girdle abduction (protraction)

Shoulder joint external rotation= what movement at shoulder girdle

shoulder girdle adduction (retraction)

The price of mobility is reduced by

stability

The more mobile a joint is the less

stable it is

_______ inserts on lesser tubercle of humerus

subscapularis

Rotator cuff group of muscles

subscapularis,supraspinatus, infranspinatus, and teres minor

____ attaches to greater tubercle from above (abduct)

supraspinatus

_____ inserts superiorly on greater tubercle of humerus

supraspinatus

________ originates on medial two third of supraspinatus fossa

supraspinatus

_______ originates on posterior scapula lateral border

teres minor

all shoulder joint muscles are innervated from

the brachial plexus

Glenohumeral joint is paired with shoulder girdle to accomplish

total shoulder range of motion

is the rotator cuff frequently injured

yes


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