Scapular and Pectoral Region Flashcards
What is one of the most freq. fractured bones?
Clavicle
What type of joint is the sternoclavicular joint, what else is unique about this attachment
Saddle joint
Only place of bony attachment of the UE to the axial skeleton
Where is the clavicle likely to break about 70% of the time
In the middle
Where do about 25 % of clavicular fractures occur
the lateral third
Where is the fracture of the clavicle most rare ( 2-5%)- what is an additional risk to injuring this part
Meidal 1/3 where it attaches to the sternum
may puncture the veins/arteries in this region
How does tenting/ clavicular shortening occur
Muscles pull the clavicle superior, and the lateral portion anterioly and inferiorly (pectoralis major) resulting in tenting and clavicular shortening
What ligament traverses the suprascapulrar notch
Superior transverse scapular ligament
What goes over and what goes under the superior transverse scapular ligamen
Suprascapular Nerve goes UNDER
Suprascapular artery goes Over
What nerve is in direct contact with the surgical neck
axillary n.
What nerve is in direct contact with: radial groove
radial
Distal end of the humerus is in contact with what nerve
Median
What nerve is in contact with the Medial epicondyle
Ulnar
What ligaments support the sternoclavicular joint
anterior and posterior sternoclavicular ligaments, interclavicular ligament, costoclavicular ligament
What type of joint is the acromioclavicular joint
Plane (synovial)
What ligaments are involved in the AC joint
acromioclavicular ligament
Coracoclavicular ligaments
Conoid
Trapezoid
What ligament is involved in reinforcing the glenohumeral joint and NOT articulation of the clavicle and scapula
Coracoacromial ligament
- stops abduction
3 types of shoulder separations
Type 1- no torn ligaments, only sprained/strained AC ligament
Type 2- Torn AC ligament, sprained coracoclavicular ligaments
Type 3- Torn AC and CC ligaments
What type of joint is the glenohumeral joint
Ball and socket (synovial)
What are the three ranges of motion of the glenohumeral joint
- Transverse/horizantal (thru the head of the humerus into the glenoid fossa): Flexion and extension
- Anterior/Posterior: Abduction and adduction
- Long axis (down the shaft of the humerus): medial and lateral rotation
Borders of the quadrangular space
Teres minor (superior)
Teres Major (inferior)
Surgical neck of the humerus (lateral)
Long head of triceps (medially)
Whats in the quadrangular space
Posterior circumflex humeral artery (3rd branch) Axillary Nerve (C5 and 6)
What are the borders of the triangular interval
Long head of triceps (medially)
Teres Major
Lateral head of triceps (laterally)
What is found in the triangular interval
profundus brachii a.
Radial N
What is in the triangular space
circumflex scapular artery
What are the borders of the triangular space
Teres Minor (superiorly) Teres major (Inferiorly) Long head of triceps (laterally)
What would a “winged scapula” indicate
Injured long thoracic nerve affecting serratus anterior
scapula moves laterally and posteriorly away from thoracic wall (esp. when pushing against a wall)
Cant abduct more than horizantally
Borders of triangle of ascultation
Trapezius
Medial border of scapula
Latissimus dorsi
* no muscles can hear breath sounds
Sx of accessory Nerve
ipsilateral weakness when shoulders are elevated (shrugged) against resistance
Sx of thoracodrosal n, injury
- surgery in axilla
- unable to raise the truk with the upper limbs
cannot use axillary clutch
