Dorsal Scapular POINA Flashcards
Deltoid Purposeful Action
-Yoga with arms overhead (all)
-Reaching for seatbelt (anterior fibers)
-Putting on seatbelt (posterior)
Deltoid Main Action
-Clavicular (anterior): flex and IR arm
-Acromial (middle): abduct arm
-Spinal (posterior): extend and ER arm
Deltoid Proximal Attachment
Clavicle, acromion, spine of scap (where trap ends)
Deltoid Distal Attachment
Deltoid tuberoisty
Deltoid Innervation
Axillary nerve (C5 main, C6)
Pectoralis Major Purposeful Action
Reaching across body into overhead cabinet, putting on seatbelt
Pectoralis Major Main Action
Arm: adduction, IR, horizontal adduction
Scapula: Protraction
Acting alone
Clavicular head: flex arm
Sternocostal head: extend humerus from flexed
Pectoralis Major Proximal Insertion
Clavicle, sternum, superior 6 costal cartilages, external oblique
Pectoralis Major Distal Attachment
Lateral lip of intertubercular groove of humerus
Pectoralis Major Innervation
Lateral and medial pectoral nerves
-Clavicular head: C5, C6 (main)
-Sternocostal head: (C7-8 main, T1)
Pectoralis Minor Purposeful Action
Taking a deep breath, walking with crutches
Pectoralis Minor Main Action
-Stabilize scapula (protraction)
-Assist to elevate thorax during forced inhalation (scap fixed)
Pectoralis Minor Proximal Attachment
3-5th rib near costal cartilage
Pectoralis Minor Distal Attachment
Coracoid process
Pectoralis Minor Innervation
Median pectoral nerve (C8, T1), lateral pectoral nerve (variable)
Infraspinatus Purposeful Action
Racket sports, table tennis
Infraspinatus Main Action
External rotation of shoulder, stabilize head of humerus in glenoid cavity
Infraspinatus Proximal Attachment
Infraspinous fossa