Ex2 - Posterior/Anterior axio-appendicular muscle, Scapulohumeral muscles

Category: posterior axio-appendicular muscle

Origin: Spinous processes of T7–L5, thoracolumbar fascia, iliac crest, ribs 9–12, and the inferior angle of the scapula

Latissimus dorsi (origin)

Category: posterior axio-appendicular muscle

Insertion: Intertubercular sulcus of humerus

Latissimus dorsi (insertion)

Category: posterior axio-appendicular muscle

Innervation: Thoracodorsal

Latissimus dorsi (innervation)

Category: posterior axio-appendicular muscle

Main Action: Extends, adducts, and medially rotates the arm.

Assists in respiration

Latissimus dorsi (main action)

Category: Anterior Axio-Appendicular Muscle

Insertion: lateral lip of intertubercular sulcus of humerus

Pectoralis major (insertion)

Category: Anterior Axio-Appendicular Muscle

Origin: Clavicular head: anterior surface of medial half of clavicle; Sternocostal head: anterior surface of sternum, superior six costal cartilages, aponeurosis of
external oblique

Pectoralis major (origin)

Category: Anterior Axio-Appendicular Muscle

Innervation: lateral/medial pectoral nerves

Pectoralis Major (innervation)

Category: Anterior Axio-Appendicular Muscle

Main Action: Adducts and medially rotates humerus

Clavicular head flexes

Sternocostal head extends humorus

Pectoralis Major (Main action)

Category: Anterior Axio-Appendicular Muscle

Insertion: Coracoid process of scapula

Pectoralis minor (insertion)

Category: Anterior Axio-Appendicular Muscle

Origin: 3rd-5th ribs near their costal cartilages

Pectoralis minor (origin)

Category: Anterior Axio-Appendicular Muscle

Innervation: Medial pectoral nerve

Pectoralis minor (innervation)

Category: Anterior Axio-Appendicular Muscle

Main Action: stabilizes scapula by drawing it inferiorly and anteriorly against thoracic wall

Pectoralis minor (main action)

Category: Anterior Axio-Appendicular Muscle

Insertion: Inferior surface of middle third of clavicle

Subclavius (insertion)

Category: Anterior Axio-Appendicular Muscle

Origin: junction of 1st rib and its costal cartilage

Subclavius (origin)

Category: Anterior Axio-Appendicular Muscle

Innervation: Nerve to subclavius

Subclavius (innervation)

Category: Anterior Axio-Appendicular Muscle

Main Action: Anchors and depresses clavicle

Subclavius (main action)

Category: Anterior Axio-Appendicular Muscle

Insertion: Anterior surface of medial border of scapula

Serratus Anterior (insertion)

Category: Anterior Axio-Appendicular Muscle

Origin: External surfaces of lateral parts of 1st-8th ribs

Serratus Anterior (origin)

Category: Anterior Axio-Appendicular Muscle

Innervation: long thoracic nerve

Serratus Anterior (innervation)

Category: Anterior Axio-Appendicular Muscle

Main Action:

Protracts scaoula and holds it against thoracic wall

Superiorly rotates scapula so glenoid cavity is facing up

Serratus Anterior (main action)

Category: Scapulohumeral muscle

Insertion: deltoid tuberosity of humerus

Deltoid (insertion)

Category: Scapulohumeral muscle

Origin: lateral third of clavicle

Acromion

Spine of scapula

Deltoid (origin)

Category: Scapulohumeral muscle

Innervation: Axillary nerve

Deltoid (innervation)

Teres minor

Category: Scapulohumeral muscle

Main Action: Laterally rotates arm; weak adductor of arm

Acts with rotator cuff muscles

Stabilizes humeral head in glenoid cavity

Deltoid (main action)

Scapulohumeral muscle

Insertion: Greater tubercle of humerus

Supraspinatus

Infraspinatus

Teres minor (Insertion)

Scapulohumeral muscle

Origin: supraspinous fossa of scapula

Supraspinatus (origin)

Scapulohumeral muscle

Origin: infraspinous fossa of scapula

Infraspinatus (origin)

Scapulohumeral muscle

Innervation: Suprascapular nerve

Supraspinatus (innervation)

Infraspinatus

Scapulohumeral muscle

Main action: Initiates and assists deltoid in abduction of arm; acts
with rotator cuff muscles; stabilizes humeral head in
glenoid cavity

Supraspinatus (main action)

Scapulohumeral muscle

Main action:

Laterally rotates arm; may assist in adduction of arm;
acts with rotator cuff muscles; stabilizes humeral head in glenoid cavity

Infraspinatus (main action)

Scapulohumeral muscle

Origin: Middle part of lateral boarder of scapula

Teres minor (origin)

Scapulohumeral muscle

Main Action:

Laterally rotates arm; weak adductor of arm; acts with rotator cuff muscles; stabilizes humeral head in glenoid cavity

Teres minor (main action)

Scapulohumeral muscle

Origin: Posterior surface of inferior angle of scapula

Teres major (origin)

Scapulohumeral muscle

Insertion: Medial lip of intertubercular sulcus of humerus

Teres major (insertion)

Scapulohumeral muscle

Innervation:lower scapular nerve

Teres major (innervation)

Scapulohumeral muscle

Main action: adducts, extends, medially rotates arm

Teres major (main action)

Category: Scapulohumeral muscle

Origin: Subscapular fossa

Subscapularis (origin)

Category: Scapulohumeral muscle

Insertion: Lesser tubercle of humerus

Subscapularis (insertion)

Category: Scapulohumeral muscle

Innervation: upper and lower subscapular nerves

Subscapularis (innervation)

Category: Scapulohumeral muscle

Main action: medially rotates arm

helps hold head of humerus in glenoid cavity

Subscapularis (main action)