shoulder joint Flashcards
(24 cards)
SHOULDER JOINT
what’s the scientific name
glenohumoral joint
SHOULDER JOINT
what type of joint
ball and socket
SHOULDER JOINT
what bones articulate
head of humerus
glenoid fossa cavity
SHOULDER JOINT
features of the humerus
greater tubercle
lesser tubercle
intertubercular groove
deltoid tuberosity
SHOULDER JOINT
what adds stability to the shoulder? (4)
1) labrum
2) fibrous joint
3) glenohumeral ligaments
4) rotator cuff tendons
SHOULDER JOINT
tendons at the shoulder (4)
where on a diagram?
1) suprasinatus
(top 1
2) infraspinatus (left 1
3) subscapularis ( left 2
4) teras minor (right)
SHOULDER JOINT
3 main stability ligaments
superior glenohumoral ligament
middle glenohumoral ligament
inferior glenohumoral ligament
SHOULDER JOINT
what ligament joins coracoid to humorous
coracohumeral ligament
SHOULDER JOINT
what planes can movement occur around
sagital - forward flexion, forward extension
frontal - abduction , adduction
horizontal - horizontal adduction. horizontal abduction
internal/external rotation
outward/ inward rotation
SHOULDER JOINT
superficial muscles (4)
pectorals major
latissimus dorsi
teres major
deltoid
SHOULDER JOINT
deep muscles (4)
what do they from?
rotator cuff
supraspinatus
infraspinatus
teres minor
subscapularis
SHOULDER JOINT
PECTORALIS MAJOR
1) origin
2) insertion
3) movements
1) medial half of clavicle surface
first 6 ribs
2) humerus intertubecular groove
3) adduction
horizontal adduction
internal rotation
SHOULDER JOINT
LATISSIMUS DORSI
1) origin
2) insertion
3) movements
1) ilium posterior crest
back of sacrum + lumbar spinous processes
lower 6 thoracic vertebrae
2) humerus intertubecular groove
3) adduction
horizontal abduction
extension
internal rotation
SHOULDER JOINT
TERES MAJOR
1) origin
2) insertion
3) movements
1) inferior 3rd of scapula lateral border
2) humerus intertubecular groove
3) adduction
horizontal abduction
extension
internal rotation
SHOULDER JOINT
ANTERIOR DELTOID
1) movement
2) O
3) I
abduction
flexion
horizontal adduction
2) lateral 1/3 of clavicle
3)
SHOULDER JOINT
MIDDLE DELTOID
1) movement
2) O
3) I
1) abduction
2) scapula acromion process
3) deltoid tuberosity
SHOULDER JOINT
POSTERIOR DELTOID
1) movement
2) O
3) I
1) abduction
extension
horizontal abduction
2) scapula spine
3) deltoid tuberosity
SHOULDER JOINT
SUBSCAPULARIS (anterior rotator cuff)
O:
I:
movement:
O: sub scapular fossa
I: less tubercle of humerus
internal rotation
SHOULDER JOINT
posterior rotator cuff muscles (3)
movement
supraspinatus
teres minor
infraspinatus
I: head of humerus
external rotation
SHOULDER JOINT
rotator cuff injuries (2)
muscle/tendon strain
impingement
- in small subacromial space
- sumpraspinatus hypertrophy
-shoulder joint laxity
SHOULDER JOINT
BICEP BRACHII (LONG HEAD)
1) movement
2) O
3) I
1) horizontal adduction
weak shoulder flexion
2) supraglenoid tubercle of scapula
3) radial tuberosity
SHOULDER JOINT
BICEP BRACHII (SHORT HEAD)
1) movement
2) O
3) I
1) horizontal adduction
weak shoulder flexion
2) coracoid process of scapula
3) radial tuberoisty
SHOULDER JOINT
TRICEP BRACHII
1) movement
2) O
3) I
1) extension, adduction
horizontal abduction
2) infraglenoid tubercle of scapula
3) olecranon process of ulna
SHOULDER JOINT
causes of dislocation
excessive abduction
/external rotation
impact