Arm Muscle Attachments and Actions

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What is the proximal attachment of Pectoralis Major m.?

Clavicle/Sternum

What is the distal attachment of Pectoralis Major m?

Humerus @ intertubercular sulcus

What are the actions of pectoralis major m. on the humerus?

Adduction @ shoulder, medial rotation @shoulder, flexion @ shoulder

What is the proximal attachment of pectoralis minor m?

Ribs 3-5

What is the distal attachment of pectoralis minor m?

Scapula @ coracoid process

What are the actions of pectoralis minor m?

Stabilizes scapula

What is the proximal attachment of serratus anterior m?

Ribs 1-8

What is the distal attachment of serratus anterior?

Medial border of the scapula

What is the action of serratus anterior m?

Holds scapula to thoracic wall

What is the proximal attachment of subclavius m?

1st rib

What is the distal attachment of subclavius?

Clavicle

What is the action of subclavius m?

stabilizes and depresses clavicle

What is the proximal attachment of trapezius m?

Skull, nuchal ligament, C-7-T-12

What is the distal attachment of trapezius m?

Scapula (spine and acromion) and clavicle

What are the actions of trapezius m?

Elevation, retraction and depression at the pectoral girdle

What are the proximal attachments of latissimus dorsi m?

T-7- Sacrum , ilium and ribs

What is the distal attachment of latissimus dorsi m?

Humerus at intertubercle sulcus

What are the actions of latissimus dorsi m?

Extension @ shoulder, adduction @ shoulder, medial rotation @ shoulder.

What is the proximal attachment of levator scapulae m ?

C1-C4

What is the distal attachment of levator scapulae m?

scapula (superior to spine)

What is the action of levator scapulae m?

Elevation of scapula/girdle

What is the proximal attachment of rhomboid minor m?

C7-T1

What is the distal attachment of rhomboid minor m?

Scapula at the medial border

What is the action of rhomboid minor?

Retraction of scapula

What are the proximal attachments of rhomboid major m?

T2-T5

What is the distal attachment of rhomboid major m?

Scapula at the medial border

What is the action of rhomboid major m?

retraction of the scapula

What is the proximal attachment of deltoid m?

Scapula (acromion and spine) and clavicle

What are the actions of the deltoid muscle?

abduction, flexion, extension, medial rotation and lateral rotation.

What is the proximal attachment of subscapularis m?

Scapula at the subscapular fossa

What is the distal attachment of subscapularis m?

Humerus at the lesser tubercle

What is the action of subscapularis?

Medial rotation

What is the proximal attachment of supraspinatus m?

Scapula at the supraspinous fossa

What is the distal attachment of supraspinatus m?

Humerus, at the greater tubercle

What is the action of supraspinatus m?

Innates abduction to 15 degrees

What is the proximal attachment of infraspinatus m?

Scapula, at the infraspinous fossa

What is the distal attachment of infraspinous m?

Humerus, at the greater tubercle

What is the action of infraspinous m?

lateral rotation

What is the proximal attachment of teres minor m?

Scapula, at the lateral border

What is the distal attachment of teres minor m?

Humerus, at the greater tubercle

What is the action of teres minor m?

Lateral rotation

What is the proximal attachment of teres major m?

Scapula

What is the distal attachment of teres major m?

Humerus, at the intertubercular sulcus

What are the actions of teres major m?

Adduction and medial rotation at the shoulder

What is the proximal attachment of biceps brachii long head?

Scapula