kin 365 exam 2

Muscles of the shoulder girdle

Muscles 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