Pectoral Girdle Flashcards
Pec Major Nerve
Lateral Pectoral & Medial Pectoral
Pec Major Origin
Head 1 - Clavicle
Head 2 - Sternum
Pec Major Insertion
Intertubercular Groove
Pec Major Movements
Adducts Humerus
Internal Rotates Humerus
Protracts Scapula (by pulling on Humerus)
Pec Minor Nerve
Medial Pectoral
Pec Minor Origin
Ribs
Pec Minor Insertion
Coracoid (of scapula)
Pec Minor Movements
Depression Scapula
Protraction Scapula
(But mostly just stabilises pec girdle)
Subclavius Nerve
C5
Subclavius Origin
Costal cartilage of 1st rib
Subclavius Insertion
Clavicle
Subclavius Movements
Braces Clavicle
Weak depressor Scapula
Serratus Anterior Nerve
Long Thoracic
Serratus Anterior Origin
Ribs
Serratus Anterior Insertion
Scapula (Medial border)
Serratus Anterior Movements
Protracts Scapula (“Boxer’s muscle)
Superiorly Rotates Scapula (LOWER FIBRES ONLY)
Trapezius Nerve
C11
Trapezius Origin
Superior Nuchal Line
Superior Trapezius Insertion
Clavicle
Middle Trapezius Insertion
Acromion
Inferior Trapezius Insertion
Spine of Scapula
Trapezius Movement (All fibres)
Retracts Scapula
Trapezius Movement (Superior)
Elevates scapula
Trapezius Movement (Inferior)
Scapula Depression
Trapezius Movement (Sup Inf)
Superior Rotation Scapula
Trapezius Movement (Mid)
Retracts Scapula
Levator Scapulae Origin
Upper Cerviucal Vertebrae
Levator Scapulae Insertion
Scapula
Levator Scapulae Nerve
Dorsal Scapular Nerve
Levator Scapulae Movement
Elevates and inferiorly rotates scapula
Rhomboid Major Origin
Upper Thoracic Vert
Rhomboid Minor Origin
Lower Cervical Vertebrae
Rhomboids Insertion
Scapula
Rhomboids Nerve
Dorsal Scapular
Rhomboids Movement
Retracts Scapula, Inferiorly Rotates
How to Lock Conceptual Joint
Contract Serratus anterior and rhomboids at same time, as pull in opposite directions
Lat Dorsi Origin
Iliac Crest and Lower Spinal Cord
Lat Dorsi Insertion
Humerus Intertubercular Groove
Lat Dorsi Nerve
Thoracodorsal
Lat Dorsi Movements
Adducts humerus, internally rotates humerus, inferiorly rotates scapula, depresses scapula
Scapula Angles
Glenoid Fossa (sup lat), Superior (sup med), Inferior
Scapula Surfaces
Subscapula fossa, supraspinous fossa, Infraspinous fossa
Scapula Protuberances
Acromion, Spine (continuous with acromion), Coracoid
Coracoid Ant or Post
Ant
Spine + Acromion Ant or Post
Post
Scapula Protuberances Med or Lat
Lat
Winged Scapula Cause
Serratus Anterior problem (innervation)
SC Joint Type
Synovial Saddle
SC Joint Ligaments
Ant/Post Sternoclavicular, Interclavicular, Costoclavicular
Strongest SC Ligament
Costoclavicular
SC Ligament Across Jugular Notch
Interclavicular
AC Joint Role
Allows independent movement of scapula, distinct from clavicle
AC Joint Ligaments
Acromioclavicular (weak, proper), Coracoclavicular (strong, not technically part of AC joint)
AC Joint Tear Result
Humerus Drops