Shoulder Girdle Flashcards
Name A
Supraspinous Fossa
Name B
Scapular Notch
Name C
Medial Border
Name D
Spine of Scapula
Name E
Inferior Angle
Name F
Infraspinatus Fossa
What is the red triangle?
Superior Angle
Describe the shoulder girdle
Incomplete bony ring, formed by clavicle and scapula. Joined anteriorly by manubrium of the sternum
What is this joint and what two bones does it articulate?
Sternoclavicular (SC) sternum and clavicle
What is this joint and what two bones does it articulate?
Acromioclavicular (AC) scapula and clavicle
What is this joint and what two bones does it articulate?
Glenohumeral (shoulder) joint, scapula and humerus
What is this joint, articular surfaces and movments?
*TypeScapulothoracic joint. Not a true joint (pseudo)
* Articular surfaces Scapulothoracic junction: Anterior surface of scapula, superiolateral surface of posterior thoracic wall
* Movements Elevation/Depression, Protraction/Retraction
What is this bone and what are it’s parts?
- Clavicle
- Sternal end (medial)
- shaft
- Acromial end (lateral)
What is A
Impression for costoclavicular ligament
What is B
Groove for subclavius muscle
What is C
Trapezoid line
What is D
Acromial Facet
What is E
Body of Clavicle
What is F
Sternal Articular notch
What is the function of the clavicle
- Attachment of upper limb to trunk
- Protection of neurovascular structures supplying upper limb
- Force transmission to axial skeleton
What are the surfaces of the scapula?
-
Anterior: Subscapular Fossa
* Posterior: Supraspinous fossa, spine, infraspinous fossa
What processes are on the scapular
- Coracoid
- Acromion
What muscles originate from the scapula
(12)
- Coracobrachialis
- biceps brachii
- deltoid,
- infraspinatus
- latissimus dorsi
- omohyoid
- subscapularis
- supraspinatus
- teres major and minor
- triceps brachii (long head),
What muscles insert on scapula (6)
- Levator scapulae
- pectoralis minor
- rhomboids
- serratus anterior
- trapezius
What is A
What connects here?
- Coracoid process
- Pec minor
- Corcobrachialis
- Short head of biceps brachii
What is B
Acromion
What is C
Glenoid Fossa
What is A
Greater Tubercle
What is B
Crest of Greater Tubercle
What is C
Lateral Supracondyler Ridge
What is D
Lateral Epicondyle
What is E
Capitulum
What is F
Anatomical neck
What is G
Head
What is H
Intertubercular sulcus
What is I
Lesser tubercle
What is J
Surgical neck
What is K
Crest of lesser tubercle
What is L
Medial supracondylar ridge
What is M
Medial epicondyle
What is N
Trochlea
What is A
Greater tubercle
What is B
Radial Groove
What is C
Lateral border
What is D
Posterior Surface
What is E
Olecranon Fossa
What is F
Groove for ulnar nerve
Name the type and articular surfaces of the Sternoclavicular joint
- Type: Synovial saddle; multiaxial
- Articular Surfaces: Sternal end of clavicle, clavicular notch of sternum, superior surface of first costal cartilage, intra-articular fibrocartilaginous disc
What are the movements and innervation of the sternoclavicular joint?
- Movements: Elevation/Depression, Protraction/Retraction, small axial rotation
- Innervation Medial supraclavicular nerve, nerve to subclavius
What are the ligaments of the sternoclavicular joint?
- Intrinsic: anterior and posterior sternoclavicular ligaments
- Extrinsic: Interclavicular and costoclavicular ligaments
What is A
Costoclavicular ligament
What is B
Anterior sternoclavicular ligament
What is C
Articular Disc
What is D
Interclavicular ligament
What type, articular surfaces of Acromioclavicular joint?
- Type: Synovial Plane, multiaxial
- Articular Surfaces: Acrominon of scapula, acromial end of clavicle
What is the innervation and movments and ligaments of the acromioclavicular joint?
- Innervation Lateral pectoral nerve, suprascapular nerve
- Movements Protraction/Retraction, Elevation/Depression, axial rotation
- Intrinsic Ligaments Superior and inferior acromioclavicular
- Extrinsic Ligaments Coracoclavicular ligament (with conoid and trapezoid parts)
What percentage of people with a type III (hooked) acromion have RTC tears? What is the incidence of type III acromion?
70% tears
39% incidence
What is A
Coracoacromial ligament
What is B
Acromioclavicular Ligament
What is C
Trapezoid Ligament
What is D
Conoid Ligament
What type, articular surfaces, innervation and blood supply of the Glenohumeral joint?
- Type Synovial ball and socket, multiaxial
- Articular Surfaces Glenoid fossa of scapula, head of humerus
What is the innervation and blood supply of the Glenohumeral joint
- Innervation Subscapular nerve (joint). Suprascapular nerve, axillary nerve, lateral pectoral nerve (joint capsule)
- Blood supply Anterior and posterior circumflex humeral, circumflex scapular and suprascapular artereries
What is this ligament, what does it connect, and what does it do?
- Superior glenohumeral (SGHL)
- Connects supraglenoid tubercle of humerus to superior part of glenoid rim
- Supports rotator interval
- Prevents inferior translation of humeral head during adduction
What is this ligament, what does it connect, and what does it do?
- Middle glenohumeral (MGHL)
- Deep to subscap muscle
- Connects inferior to bicipital sulcus of humerus to anterior and inferior part of glenoid rim
- Stabilizes anterior capsule, limiting external rotation - esp in abduct 45-60 degrees
What is this ligament, what does it connect, and what does it do?
- Inferior glenohumeral (IGHL)
- Connects surgical neck of humerus to glenoid rim
- Split into anterior and posterior bands, axillary pouch in middle
- Strongest of 3 GH ligaments
- Both bands stablize humeral head in greater than 90 abduct
- Anterior band limits external rotation of arm
- Posterior limits internal rotation
What is the ligament, what are attachments, and function?
- Coracohumeral
- AttachmentsCoracoid process of scapula to tubercles of humerus and intervening transverse ligament
- Function Limits inferior translation and excessive external rotation of humerus
What is this structure and what is its importance?
- Glenoid Fossa
- Shallow, pear-shaped pit on superolateral angle of scapula.
- Less acutely concave than convexity of humeral head - articular surfaces not fully congruent
- Surface of humeral head is 3-4x larger - only 1/3 of HH is in contact with fossa and labrum
What is this structue and its importance?
- Glenoid Labrum
- Congruency increased by labrum
- Fibrocartilaginous ring attaches to margins of fossa
- Deepens fossa slightly, triangular in shape
- Thicker anteriorly than inferiorly
- Superiorly connects to long head of biceps
What is a SLAP tear?
- Superior labrum anterior to posterior
- 4 types
- Type 2 and 4 involve biceps
What is A, involvement?
Type 1, no
What is B, involvement?
Type 2, yes - pulling
Most common
What is C, involvement?
Type 3, no
What is D, involvement?
Type 4, yes
What is the green space?
Subacromial bursa
What is the yellow space?
Subscapular bursa
What is this structure
Subdeltoid bursa (fused with subacromial bursa)