Activity 12

What are the muscles that act on the pectoral girdle?

trapezius, rhomboid major, rhomboid minor, levator scapulae, pectoralis minor, serratus anterior

What are the muscles that act on the arm (humerus) — moves shoulder joint?

deltoid, muscles of the rotator cuff (supraspinatus, subscapularis, infraspinatus, teres minor), teres major, latissimus dorsi, pectoralis major, coracobrachialis

What are the muscles that act on the forearm (radius and/or Ulna) — moves elbow joint?

Biceps brachii (long and short heads), brachialis, brachioradialis, pronator teres, supinator, triceps brachii (long, lateral, and medial heads)

What are the muscles that act on the wrist and hand — wrist joint?

flexors of the wrist/hand (flexor carpi radialis, palmaris longus, flexor carpi ulnaris), extensors of the wrist/hand (extensor digitorum, extensor carpi radialis (longus))

What are the muscles of the rotator cuff?

supraspinatus, subscapularis, infraspinatus, teres minor

What are the flexors of the wrist/hand?

flexor carpi radialis, palmaris longus, flexor carpi ulnaris

What are extensors of the wrist/hand?

extensor digitorum, extensor carpi radialis (longus)

Deltoid

Serratus anterior - deep

Pectoralis minor - deep

Pectoralis major - superficial

Coracobrachialis - deep

Biceps brachii (long heads) - superficial

Biceps brachii (short heads) - superficial

Brachialis - deep

Brachioradialis

Pronator teres -superficial

Supinator

Flexor carpi radialis

Palmaris longus

Flexor carpi ulnaris

Trapezius

Rhomboid major

Rhomboid minor

Levator scapulae

Supraspinatus -posterior

Infraspinatus - posterior

Subscapularis- anterior

Teres minor

Teres major

latissimus dorsi

triceps brachii (long head)

triceps brachii (lateral head)

triceps brachii (medial head)

Extensor digitorum - posterior

Extensor carpi radialis (longus)

Lumbodorsal/ thoracolumbar fascia

Flexor retinaculum - anterior

Extensor retinaculum - posterior

What is the action of the trapezius?

Elevates, depresses, rotates and retracts scapula

What is the origin of the rhomboid major?

spinous processes of upper thoracic vertebrae

What is the insertion of rhomboid major?

vertebral border of scapula (below spine)

What is the action of rhomboid major?

rotates and retracts scapula

What is the origin of rhomboid minor?

spinous processes of lower cervical and upper thoracic vertebrae

What is the insertion of rhomboid minor?

vertebral border of scapula (at base of spine)

What is the action of rhomboid minor?

rotates and retracts scapula

What is the origin of the levator scapulae?

Transverse processes of cervical vertebrae

What is the insertion of levator scapulae?

vertebral border of scapula (above spine)

What is the action of the levator scapulae?

elevates scapula

What is the origin of pectoralis minor?

anterior surface of upper-middle ribs

What is the insertion of the pectoralis minor?

coracoid process of scapula

What is the action of pectoralis minor

depresses, protracts, and rotates scapula

What is the origin of the serratus anterior?

outer surface of ribs 1-9

What is the insertion of serratus anterior?

entire length of vertebral border of scapula

What is the action of the serratus anterior?

protracts and rotates scapula

What is the origin of the pectoralis major?

clavicle, sternum, and costal cartilages of upper ribs

What is the insertion of the pectoralis major?

greater tubercle of humerus

What is the action of the pectoralis major?

flexes, adducts, and medially rotates arm (GH joint)

What is the action of the latissimus dorsi?

extends, adducts, and medially rotates arm (GH joint)

What is the origin of the deltoid?

clavicle, acromion process, and spine of scapula

What is the insertion of the deltoid?

deltoid tuberosity of humerus

What is the action of the deltoid?

abducts, flexes and extends, medially and laterally rotates arm (GH joint)

What is the origin of the supraspinatus?

supraspinous fossa of scapula

What is the insertion of the supraspinatus?

greater tubercle of humerus

What is the action of the supraspinatus?

abducts arm and stabilizes glenohumeral joint *rotator cuff

What is the origin of the infraspinatus?

Infraspinous fossa of scapula

What is the insertion of the infraspinatus?

greater tubercle of humerus

What is the action of the infraspinatus?

laterally rotates arm and stabilizes glenohumeral joint *rotator cuff

What is the origin of the subscapularis?

subscapular fossa of scapula

What is the insertion of the subscapularis?

Lesser tubercle of humerus

What is the action of the subscapularis?

medially rotates arm and stabilizes glenohumeral joint *rotator cuff

What is the origin of the teres minor?

axillary border of scapula

What is the insertion of the teres minor?

greater tubercle of humerus

What is the action of the teres minor?

laterally rotates and adducts arm and stabilizes glenohumeral joint *rotator cuff

What is the origin of the teres major?

inferior angle of scapula

What is the insertion of the teres major?

bicipital groove of humerus

What is the action of the teres major?

adducts, extends and medially rotates arm (GH joint)

What is the origin of the coracobrachialis?

coracoid process of scapula

What is the insertion of the coracobrachialis?

medial surface of humerus

What is the action of coracobrachialis?

flexes and adducts arm (GH joint)

What is the origin of the biceps brachii (long head)

supraglenoid tubercle of scapula

What is the insertion of biceps brachii (long head)?

tuberosity of radius

What is the action of biceps brachii (long head)?

flexes arm (GH joint), flexes forearm (elbow joint), and supinates forearm

What is the origin of the biceps brachii (short head)?

coracoid process of scapula

What is the insertion of the biceps brachii (short head)

tuberosity of radius

What is the action of the biceps brachii (short head)?

flexes arm (GH joint), flexes forearm (elbow joint)

What is the origin of brachialis?

anterior, distal humerus

What is the insertion of brachialis?

coronoid process of ulna

What is the action of brachialis?

flexes forearm/elbow

what is the origin of triceps brachii (long head)?

infraglenoid tubercle of scapula

What is the insertion of the triceps brachii (long head)?

olecranon process of ulna

What is the action of the triceps brachii (long head)?

extends forearm/elbow and extends arm (GH joint)

What is the origin of the triceps brachii (lateral head)?

proximal posterior surface of humerus

What is the insertion of the triceps brachii (lateral head)?

olecranon process of ulna

What is the action of the triceps brachii (lateral head)

extends forearm/elbow

What is the origin of the triceps brachii (medial head) ?

distal posterior surface of humerus

What is the insertion of the triceps brachii (medial head)?

olecranon process of ulna

What is the action of the triceps brachii (medial head)?

extends forearm/elbow

What is the origin of the brachioradialis?

distal-lateral humerus

What is the insertion of the brachioradialis?

styloid process of radius