Limbs 1 Flashcards
Pectoralis major origin and insertion
It has a clavichord head and a sterna, head
Proximal attachment from clavicle and sternum
Insertion into intertubercular groove of humerus
Actin of pectoralis major
Adducts and medially rotates the arm
Innervation of pectoralis majors
Medial and lateral pectoral nerves
Pectoralis minor origin and insertion
Origin from ribs 3-5
Insertion into coracoid process of scapula
Action of pectoralis minor
Stabilize scapula
Innervation of pec minor
Medial pectoral nerve
Serrated anterior origin and insertion
Origin from ribs 1-8 and insertion into anterior surface of the medial border of scapula
Action of serratus anterior
Protracts rhe scapula
Innervation of serratus anterior
Innervated by long thoracic nerve
Trapezius origin and insertion
Origin from nuchal ligament,external occipital protuberance and spinous process c7-T12 vertebrae
Insertion into lateral third of clavicle acromion and spine of scapula
Trapezius action
Elevates retracts and depressed scapula
Innervation of trapezius
By spinal accessory nerve
Latisimuss dorsi origin and insertion
Origin from iliac crest thoracolumbar fascia,spinous process of T6-T12 and inferior 3 ribs
Insertion into intertubercular groove of humerus
Action of latisimus dorsi
Adducts extends and medially rotates the arm
Innervation of lattisimus dorsi
Innervated by thoracodorsal nerve
Deltoid origin and insertion
Origin from lateral third of clavicle acromion and spine of scapula
Insertion into deltoid tuberosity
Action of deltoid
Primary abductor
Innervation of deltoid
Axillary nerve
Teres major origin and insertion
Origin from inferior angle of scapula
Inserts into intertubercular groove
Action of teres major
Adducts and medically rotates arm
What are the rotator cuff muscles
Subscapularis
Supraspinatus
Infraspinatous
Teres minor
Origin and insertion of subscapularis
Origin from subscapular fossa of scapula
Insertion into lesser tubercle of humerus
Subscapularis action
Medially rotates the arm
Supraspinatus
Origin from supraspinous fossa
Inserts into greater tubercle of humerus
Action of supraspinatous
Initiates first 15 degrees of abduction
Infraspinatous origin and insertion
Origin from Infraspinatous fossa of scapula insertion into greater tubercle of humerus
Infraspinatous action
Laterally rotates the arm
Teres minor origin and insertion
Origim from lateral border of scapula insertion into greater tubercle of humerus
Teres minor action
Laterally rotates the arm
Muscles from deep to superficial on scapula is it
Serratus Subscapularis scapula Supraspinatus and Infraspinatous
Teres minor Innervation
Axillary nerve
Terminal branches of brachial plexus
Axillary C5-C6
Musculocutaneous C5, C6, C7
Radial C5, C6, C7, C8, T1
Median C6, C7, C8, T1
Ulnar C8, T1
A muscular rhino makes ulnar
Arterial supply to shoulder
Arises from subclavian and Axillary artery
Subclavian artery
Has three parts
First is the thyrocervical trunk which gives rise to suprascpular artery
Axillary artery
3 main parts
3rd part the circumflex (anterior and posterior) and Subscapularis artery
Supplies head of humerus and glenohumeral joint
Subclavian and Axillary co,bind to form anastomosis
Venous drainage
Anterior and posterior circumflex drain into Axillary vein which is formed of union of brachial vein and basilic vein
Brachial plexus
Roots form trunks form divisions for, cords form terminal nerves
Boundaries of Axillary
Apex first rib clavicle and scapula
Anterior wall is pec major and minor
Posterior wall is latisimus dorsi teres major Subscapularis and long head of biceps brachii
Lateral wall humerus
Medial wall serratus anterior
Base skin and fascia
