Scapular region Flashcards
(57 cards)
Osteology of the scapula:
Osteology of the Proximal Humerus and Articulation with the scapula
Glenohumeral joint type: ?
Unique characteristic: ____ ____ tendon travels through the joint + surrounded by ______ membrane
ball and socket joint; synovial joint;
Unique characteristic: biceps brachii tendon travels through the joint + surrounded by synovial membrane
Ball of the glenohumeral joint
Humeral head
Socket of the glenohumeral joint
concave glenoid fossa
Subacromial bursa location:
inferior to acromion process, coracoacromial ligament and deltoid
Subscapular bursa location:
between the tendon of the subscapularis and the neck of the scapula, protecting the tendon as it passes by the coracoid process and the neck of the scapula.
Bursa is continuous or not continuous with the GH joint?
Continuous with the cavity of the GH joint
Bursae of the glenohumeral joint:
- Subacromial bursa
- Subscapular bursa
Ligaments of the GH joint (6):
- Coracoacromial ligament
- Coracohumeral ligament
- Superior GH ligament
- Middle GH ligament
- Inferior GH ligament
- Transverse Humeral ligament
Function of GH joints:
Prevent excessive anterior translation of the humeral head.
Acromioclavicular joint: type + location?
Plane type; connects the clavicle + scapula
Sternoclavicular joint: type + location?
Saddle-type synovial joint; functions as a ball & socket to accommodate movements of scapula. Connects scapula + thorax
Glenohumeral Joint: type + location?
ball-and-socket; synovial; connects humeral head + glenoid cavity of scapula
Movements of GH joint?
- Flexion + Extension
- Abduction + Adduction
- Internal Rotation + External Rotation
- Circumduction
Scalpulothoracic Muscles (6): connect thorax + scapula
- Trapezius
- Levator Scapulae
- Rhomboid major + minor
- Pectoralis Minor
- Serratus Anterior
Scalpulohumeral Muscles (6): connects scapula to humerus
- Teres Major
- Deltoid
- Infraspinatus
- Supraspinatus
- Teres Minor
- Subscalpularis
Identify this muscle
Serratus Anterior
Origin:
Insertion:
Action:
Innervation:
Origin: Ribs 1-8 →
Insertion: Anterior border of medial scapula
Action: Protraction & lateral rotation of scapula; holds scapula against thoracic wall
Long thoracic nerve (C5-C7) of ventral rami
Identify this muscle
Teres Major
Teres Major
Origin:
Insertion:
Action:
Innervation:
Origin: Inferior angle of scapula
Insertion: intertubercular sulcus
Action: Adducts + medially rotates humerus
Innervation: lower Subscapular nerve (C5-C6)
Identify this muscle
Deltoid
Origin:
Insertion:
Action:
Innervation:
Origin: Lateral 3rd of clavicle, acromion process, and spine of scapula
Insertion: Deltoid tuberosity
Action: Abduct humerus after first 15°
Flexion and medial rotation, extension
+ lateral rotation
Innervation: Axillary nerve (C5-C6)
Identify this muscle
Infraspinatus