Shared Flashcard Set

Details

Posterior Shoulder
Posterior Shoulder
20
Anatomy
Undergraduate 4
01/24/2009

Additional Anatomy Flashcards

 


 

Cards

Term
rotator cuffs
Definition
Supraspinatus
Infraspinatus
Teres minor
Subscapularis
Term
anterior deltoid
Definition
ORIGIN: lat 1/3 of clavicle

INSERTION: deltoid tubercle

ACTION: abduction, flexion, horizontal adduction

NERVE: axillary
Term
middle deltoid
Definition
ORIGIN: acromion

INSERTION: deltoid tubercle

ACTION: abduction

NERVE: axillary
Term
posterior deltoid
Definition
ORIGIN: scapular spine

INSERTION: deltoid tubercle

ACTION: abduction, extension, horizontal abduction

NERVE: axillary
Term
axillary nerve
Definition
- from POSTERIOR cord of brachial plexus
- prone to injury (i.e. during shoulder dislocation)
- winds around the neck of the humerus
- paralysis & loss of sensation
Term
teres major
Definition
ORIGIN: lower lateral border and inferior angle of scapula

INSERTION: crest of LESSER tubercle and medial lip of intertubercular sulcus

ACTION: internal rotation, adduction, extension

NERVE: lower subscapular nerve
Term
supraspinatus
Definition
ORIGIN: supraspinous fossa of scapula

INSERTION: superior facet of greater tuberosity of humerus

ACTION: initiates ABD, compression of the GH joint

NERVE: suprascapular nerve
Term
infraspinatus
Definition
ORIGIN: infraspinous fossa of scapula

INSERTION: middle facet greater tuberosity of humerus

ACTION: external rotation

NERVE: suprascapular nerve
Term
suprascapular nerve
Definition
nerve runs through notch, artery goes above ligament.. see pic
Term
teres minor
Definition
ORIGIN: upper part of lateral border of scapula

INSERTION: inferior facet of greater tubercle of humerus

ACTION: external rotation

NERVE: axillary nerve
Term
subscapularis
Definition
ORGIN: subscapular fossa (anterior scapula)

INSERTION: lesser tubercle of humerus

ACTION: internal rotation

NERVE: upper & lower subscapular nerve
Term
superior transeverse scapular ligament
Definition
runs above scapular notch where suprascapular nerve and artery go
Term
long head of triceps
Definition
ORIGIN: infraglenoid tubercle of scapula

INSERTION: olecranon process

ACTION: elbow extension, shoulder extension

NERVE: radial
Term
lateral head of triceps
Definition
ORIGIN: posterior surface of lateral border of humerus

INSERTION: posterior part of olecranon

ACTION: elbow extension

NERVE: radial
Term
medial head of triceps
Definition
ORIGIN: posterior lower shaft of humerus

INSERTION: olecranon process

ACTION: elbow extension

NERVE: radial
Term
triceps brachii kinesiology
Definition
- long head crosses elbow AND shoulder joint
- the long head becomes ACTIVELY INSUFFICIENT when full elbow extension is attempted w/ shoulder hypertension
Term
Which triceps exercise is harder? Why?

Triceps kickbacks vs. triceps pull downs
Definition
triceps kickbacks b/c long head of triceps is actively insufficient (less contribution from long head) whereas triceps pull downs utilize all 3 heads
Term
quadrangular space
Definition
borders:
1. teres minor (sup)
2. teres maj (inf)
3. surgical neck of humerus (lat)
4. long head of triceps (med)

Sig:
- the axillary nerve and posterior circumflex humeral artery can be found here (supplies deltoids & shoulder joint)
Term
triangular interval
Definition
borders:
1. long head of triceps
2. lateral head of triceps
3. teres major (sup border)

Sig:
- the RADIAL nerve and the PROFUNDA BRACHII ARTERY are found in this space (they travel along the same pathway)
Term
posterior shoulder tightness
Definition
Contracture (becomes "tight") of the posterior shoulder structures commonly seen in overhead athletes, particularly baseball players.

-repetitive eccentric contraction during deceleration of the limb

-RESULTS IN: Glenohumeral Internal Rotation Disorder (GIRD); Ant/Sup migration of the humeral head during ER

-related to a variety of pathologies (impingement, labral lesions, rotator cuff, etc)
Supporting users have an ad free experience!