kines ch 5
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
