Studied by 5 peopleMuscles of the shoulder girdle
Trapezius Levator scapula Rhomboids Serratus anterior Pectoralis minor
upper trapezius origin
occipital protuberance, posterior ligaments of neck
upper trapezius insertion
posterior aspect of the lateral third of clavicle
middle trapezius origin
spinous process of 7th cervical and upper 3 thoracic
middle trapezius insertion
medial border of the acromion process and upper border of the scapular spine
middle trapezius action
elevation, upward rotation, retraction
lower trapezius origin
spinous process of 4-12 thoracic
lower trapezius insertion
triangular space at base of scapular spine
lower trapezius action
depression, retraction, upward rotation
levator scapula origin
transverse process of upper 4 cervical
levator scapula insertion
medial border of scapula from superior angle to scapular spine
levator scapula action
elevation, downward rotation, adduction
rhomboid minor origin
spinous process of 7 cervical and 1 thoracic
rhomboid minor insertion
medial border of scapula above spine of scapula
rhomboid major origin
spinous process of 2-5 thoracic
rhomboid major insertion
medial border of scapula below spine
rhomboid action
retraction, downward rotation, elevation
______ prevents scapular winging
rhomboid
rhomboid works with ____ and against ____
traps, lats
serratus anterior origin
surface of upper 9 ribs at side of chest
serratus anterior insertion
anterior aspect of medial border
serratus anterior action
protraction, upward rotation
serratus anterior works with _______ and against _____
pec minor, rhomboid
pec minor origin
anterior surface of ribs 3-5
pec minor insertion
coracoid process
pec minor action
protraction, downward rotation, depression
pec minor works with ______ in true abduction
serratus anterior
overtight pec minor leads to _____
kyphosis
intrinsic muscles of the shoulder joint
deltoid, coracobrachialis, teres major, rotator cuff
extrinsic muscles of the shoulder joint
latissimus dorsi, pec major
anterior deltoid origin
anterior lateral third of clavicle
anterior deltoid insertion
deltoid tuberosity on lateral humerus
anterior deltoid action
abduction, flexion, horizontal adduction, internal rotation, diagonal adduction
middle deltoid origin
lateral acromion
middle deltoid insertion
deltoid tuberosity on lateral humerus
middle deltoid action
abduction, horizontal abduction
posterior deltoid origin
Inferior edge of scapular spine
posterior deltoid insertion
deltoid tuberosity on lateral humerus
posterior deltoid action
abduction, extension, horizontal abduction, external rotation, diagonal abduction
anterior and posterior deltoid ____ each other
oppose
upper pec major origin
medial half of anterior surface of clavicle
upper pec major insertion
lateral lip of intertubercular groove of humerus
upper pec major action
internal rotation, horizontal adduction, flexion to 60, abduction after 90, adduction below 90, diagonal adduction
lower pec major origin
anterior surface of costal cartilage of ribs 1-6
lower pec major insertion
lateral lip of intertubercular groove of humerus
lower pec major action
internal rotation, horizontal adduction, diagonal adduction, adduction and extension from flexed
latissimus dorsi origin
posterior crest of ilium, back of sacrum and spinous process of lumbar and lower 6 thoracic
latissimus dorsi insertion
Medial lip of intertubercular groove of humerus anterior to insertion of teres major
latissimus dorsi action
adduction, extension, internal rotation, horizontal abduction
teres major origin
posterior on inferior third of lateral border of scapula
teres major insertion
medial lip of intertubercular groove
teres major action
adduction, internal rotation, extension
coracobrachialis origin
coracoid process of scapula
coracobrachialis insertion
medial surface of humerus
coracobrachialis action
flexion, adduction, horizontal adduction
rotator cuff muscles
supraspinatus, infraspinatus, teres minor, subscapularis
subscapularis origin
entire anterior surface of subscapular fossa
subscapularis insertion
lesser tubercle of humerus
subscapularis action
weak internal rotation, adduction, extension, stabilization
supraspinatus origin
medial 2/3 of supraspinatus fossa
supraspinatus insertion
superiorly on greater tubercle
supraspinatus action
abduction, stabilization
most commonly injured rotator cuff
Supraspinatus
the only rotator cuff muscle that does not rotate
supraspinatus
infraspinatus origin
posterior surface of scapula below spine
infraspinatus insertion
posteriorly on the greater tubercle of humerus
infrapsinatus action
external rotation, horizontal abduction, extension, stabilization
infraspinatus provides _____ stability
posterior
teres minor origin
posteriorly on upper and middle aspect of lateral border of scapula
teres minor insertion
posteriorly on greater tubercle of humerus
teres minor action
external rotation, horizontal abduction, extension, stabilization
teres minor strengthen and stretch the same as _____
infraspinatus
anterior muscles of the elbow
biceps brachii, brachialis, brachioradialis
posterior muscles of the elbow
triceps brachii, anconeus
biceps brachii long head origin
Supraglenoid tubercle above the superior lip of the glenoid fossa
biceps brachii short head origin
coracoid process of scapula, upper lip of glenoid fossa
biceps brachii insertion
radial tuberosity
biceps brachii action
elbow flexion, supination, horizontal adduction, shoulder flexion, abduction
the biceps brachii is more effective in flexion when forearm is ____
supinated
brachialis origin
distal half of anterior humerus
brachialis insertion
coronoid process of ulna
brachialis action
true flexion of elbow
brachioradialis origin
distal 2/3 of lateral supracondylar ridge of humerus
brachioradialis insertion
lateral surface of distal radius
brachioradialis action
elbow flexion, pronation and supination to neutral
the brachioradialis provides ____ stability
lateral
triceps brachii long head origin
infraglenoid tubercle below inferior lip of glenoid fossa of the scapula
triceps brachii lateral head origin
upper half of the posterior surface of the humerus
triceps brachii medial head origin
Distal 2/3 of the posterior surface of the humerus
triceps brachii insertion
olecranon process of ulna
triceps brachii action
elbow extension
triceps brachii long head action
elbow extension, shoulder adduction and horizontal adduction
anconeus origin
Posterior surface of the lateral condyle of the humerus
anconeus insertion
Posterior surface of the lateral olecranon process and proximal 1/4 of the ulna
anconeus action
elbow extension
the pronator teres is located ____ compared to the ____ pronator quadratus
proximal, distal
supinator origin
lateral epicondyle of humerus
supinator insertion
lateral surface of proximal radius
sagital plane
right and left
actions in sagital plane
flexion/extension
Note
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