Test 2 Flashcards
action of upper trapezius-bilateral
extend head and neck
action of upper trapezius-unilateral
- laterally flexes head and neck to same side
- rotates head and neck to opposite side
- elevates scapula
- upwardly rotates scapula
nerve of trapezius
spinal accessory nerve CN XI
action of middle trapezius
adduction of scapula
action of lower trapezius
- depresses scapula
- upwardly rotate scapula
origin of trapezius
- external occipital protuberance
- ligamentum nuchal
- spinous process of C7-T12
insertion of trapezius
- spine of scapula
- acromion process
- lateral 1/3 clavicle
action of levator scapula-unilateral
- laterally flexes head and neck
- rotates head and neck to same side
- elevates scapula
- downwardly rotates scapula
action of levator scapula-bilateral
extends head
origin of levator scapula
transverse process of C1-4
insertion of levator scapula
superior angle of scapula
action of rhomboids
- adduction of scapula
- elevate scapula
- downwardly rotate scapula
origin of rhomboid minor
spinous process of C7-T1
origin of rhomboid major
spinous process of T2-T5
insertion of rhomboids
medial border of scapula
action of serrates anterior-origin fixed
- abduction of scapula
- depress scapula
- holds medial border of scapula against ribs
action of serrates anterior-insertion fixed
forced inspiration
nerve of serrates anterior
long thoracic nerve
origin of serrates anterior
lateral upper 8 ribs
insertion of serrates anterior
anterior medial border of scapula
action of pectoralis minor
- abduction of scapula
- depress scapula
- tilts scapula anteriorly
- assist inhalation
nerve of pectoralis minor
medial pectoral nerve
origin of pectoralis minor
anterior of 3-5 ribs
insertion of pectoralis minor
coracoid process
What is the shoulder complex?
scapula, humerus, clavicle, sternum and ribs
What is the shoulder girdle?
scapula and clavicle
What is the shoulder joint?
scapula and humerus
Where does scapula sit?
between T2- T7 rib and 2-3” laterally from spinous process
SC Joint actions
- elevate/depress
- protract/retract
- rotate
SC joint arthrokinematics
roll and slide
AC Joint actions
- upward/downward rotation
- horizontal & sagittal plane rotational adjustment
ST Joint located
not a true joint
between T2-T7 rib and approximately 2 1/2” from spinous process
ST Joint actions
- elevate/depress
- protraction/retraction
- upward/downward rotation
What is tipping?
superior end tips anterior and the posterior end tips anterior
What is winging?
medial border comes off thoracic
What is a proximal stabilizer?
muscle that originates off spine, ribs and cranium and insert into scapula and clavicle
What is a distal stabilizer?
muscles that originates on scapula and clavicle and inserts into humerus or forearm
GH Joint actions
- extension/flexion
- abduction/adduction
- internal rotation/external rotation
- horizontal abduction/horizontal adduction
What is scapulohumeral rhythm?
2:1 ratio
every 2 degrees of shoulder abduction/flexes pass 30 depress, the ST joint moves 1 degree
