Superficial Back, Chest and Brachium Flashcards
Trapezius
O: Occipital region andC2-T12 spines
I: Scapular spine, acromion and lat clavicle
Ax: Ext head/neck; upwardly rotate, elevate, depress and retract scapula
N: Spinal accessory N XI
A: Transverse cervical A
Levator Scpaulae
O: C1-C4 transverse processes I: Sup angle of scapula Ax: Lat flex neck; downwardly rotate and elevate scapula N: Dorsal scapular N A: Dorsal scapular A
Rhomboid Minor
O: C7-T1 vertebral spine I: Sup vertebral border of scapula Ax: Elevates, retracts and downwardly rotates scapula N: Dorsal scapular N A: Dorsal scapular A
Rhomboid Major
O: T2-T5 vertebral spines I: Vertebral border of scapula Ax: Elevates, retracts and downwardly rotate scapula N: Dorsal scapular N A: Dorsal scapular A
Latissimus Dorsi
O: T7-L5 vertebral spines, sup sacrum and iliac crest
I: Inferior angle of scapula and medial lip of bicipital sulcus
Ax: compress ribcage; ext, add and int rotate shoulder; depress, retract and downwardly rotate scapula
N: Thoracodorsal N
A: Thoracodorsal A
**Prime mover for ext & add shoulder
Subscapularis
O: Subscapular fossa I: Lesser tubercle of ant humerus Ax: Flex, add and int rotate shoulder N: Upper and lower subscapular N A: Subscapular A **Prime mover for internally rotating shoulder
Supraspinatus
O: Supraspinous fossa of scapula I: SUp greater tubercle of humerus Ax: ABd and ext rotates shoulder N: Suprascapular N A: Suprascapular A
Infraspinatus
O: Infraspinous fossa of scapula I: post greater tubercle of humerus Ax: Ext, add and externally rotate shoulder N: Supscapular N A: Suprascapular A
Teres Minor
O: Axillary border of scapula I: Post greater trochanter of humerus Ax: Ext, add and externally rotate shoulder N: Axillary N A: Circumflex scapular A
Teres Major
O: Inf angle of scapula I: Medial lip of bicipital sulcus Ax: Ext, add and internally rotate scapula N: Lower subscapular N A: Circumflex scapular A
Deltoid (Deltoideus)
O: Scapular spine, acromion and lat clavicle
I: Deltoid tuberosity of humerus
Ax:
- Ant head: Flex, ABd and internally rotate shoulder
- Sup head: ABd shoulder
- Post head: Ext, ABd and externally rotates shoulder
N: Axillary N
A: Ant and post humeral circumflex Aa
**Prime mover for shoulder flex, ext and ABd
Serratus Anterior
O: Anterolateral ribs 1-8 [Serr8tus goes to 8]
I: Ant vertebral border of scapula
Ax: Protracts, depresses and upwardly rotates scapula; Expands ribcage
N: Long thoracic N
A: Long Thoracic A
Pectoralis Major
O:
- Sternal Head : sternum and costal cartt 1-6
- Clavicular head: prox half of clavicle
I: Lat lip of bicipital sulcus of humerus
Ax: Expand ribcage; add and internally rotates shoulder; clavicular head flexes shoulder
N: Med and lat pectoral N
A: Thoracoacromial A
Pectoralis Minor
O: Ribs 3-5 I: Coracoid process of scapula Ax: Expands ribcage; depress, protract and downwardly rotate scapula N: Med pectoral N A: Thoracoacromial A
Subclavius
O: Junction of first rib and costal cartilage I: Inf central clavicle Ax: Depress and protract clavicle N: Subclavian N A: Thoracoacromial A [1 CC to ICC]