Unit 1: Lecture 10 Flashcards Preview

OT 716 - Unit I > Unit 1: Lecture 10 > Flashcards

Flashcards in Unit 1: Lecture 10 Deck (27):

Bony components of the shoulder

- Clavicle
- Scapula


Proximal humerus joins shoulder girdle at...

glenoid fossa


Joints of the shoulder complex (4)

- Glenohumeral joint
- Sternoclavicular joint
- Acromioclavicular joint
- Scapulothoracic joint


Glenohumeral joint ligaments (6)

- Superior/Middle/Inferior glenohumeral ligaments
- Coracohumeral ligament
- Glenoid labrum (SLAP lesion)
- Articular capsule


Sternoclavicular joint ligaments/protection (6)

- Anterior/Posterior sternoclavicular ligament
- Anterior/Posterior interclavicular ligaments
- Articular capsule
- Articular disk


Acromioclavicular joint ligament (3)

- Acromioclavicular ligament (thickening of articular capsule)
- Coracoacromial ligament (forms supraspinatus tunnel)
- Coracoclavicular ligament


Acromioclavicular separation is more commonly referred to as a...

shoulder separation


Scapulohumeral rhythm

2/3::1/3 abduction movement for glenohumeral joint movement compared to scapulothoracic joint movement


"Winged scapula?"

Potential damage to long thoracic nerve, which innervates the serratus anterior, which helps in affixing the scapula to the thoracic wall


Rotator cuff muscles and attachments (4)

- Subscapularis - lesser tubercle
- Supraspinatus - greater tubercle (superior facet)
- Infraspinatus - greater tubercle (middle facet)
- Teres Minor - greater tubercle (inferior facet)


Motions muscles of rotator cuff help with:

Medial rotation: subscapularis
Lateral rotation: infraspinatus and teres minor
Initiates abduction: supraspinatus


Pectoralis major is a large muscle which covers the upper chest _________ and contributes to the anterior ____________

Anteriorly; axillary fold


Pectoralis Major arises from...

side of sternum, shaft of clavicle, and cartilages of first 7 ribs, with fibers attaching to LATERAL lip of intertubercular groove of humerus


Pectoralis major actions

G/H medial rotator and adductor


Pectoralis minor arises from...

3rd, 4th, and 5th ribs to coracoid process of scapula.


Primary function of pectorals minor (and clinical aspect)

stabilization of shoulder girdle, but also assists lower trapezius

crutch walkers may use the pec minor as they lift the trunk against a stationary shoulder girdle base during ambulation


Subclavius connects...

first rib and clavicle


Subclavius primary function

stabilization of clavicle, but also depresses and protracts clavicle



sac-like structures containing fluid

found at points of friction (where a tendon inserts into bone)


Example of bursa? (and 5 facts about it)

Subacromial bursa/subdeltoid bursa
- size of half dollar
- located deep to deltoid
- overlying tendon of supraspinatus and joint capsule
- has an extension which courses beneath the acromion and coracoacromial ligament

The subacromial/subdeltoid bursa facilitates movement of the deltoid over the joint capsule and supraspinatus tendon


Supraspinatus tendinitis

Subacromial/subdeltoid bursa may become irritated and ultimately fuse to supraspinatus tendon and joint capsule.

Also would lead to "bursitis," or "shoulder pain"


Axilla superior markings (3)

- 1st rib
- scapula
- clavicle


Axilla boundaries (base, anterior, posterior, medial, lateral, and apex)

Base - armpit (formed and supported by axillary fascia)
Anterior - anterior axillary fold (pec major)
Posterior - poster axillary fold (lat. dorsi and teres major)
Medial - serratus anterior
Lateral - floor of intertubercular groove of humerus
Apex - triangle formed by 1st rib, scapula, and clavicle


Axillary fascia

from latissimus dorsi to the pectorals major and makes hollow of armpit


Clavipectoral fascia

investing layer of the subclavius and pectorals minor and covers the anterior aspect of the axilla


Structures that pierce the clavipectoral fascia (3)

- cephalic vein: drains upper limb and terminating in the axillary vein
- thoracoacromial vessels: supplies vascular branches to the anterior chest wall
- lateral pectoral nerve: supplies pectoralis major


Axillary sheath

adherent to the clavipectoral fascia behind the pec mini, and encloses vessels and nerves of axilla (except the axillary vein which is OUTSIDE sheath)

The axillary sheath is a fascial extension of the pre-vertebral layer of cervical fascia covering the scalene muscles