Muscle Anatomy Test 1

Pectoralis minor

O: anterior-superior surface of ribs 3-5
I: coracoid process of scapula
A: depresses and protract shoulder, rotates scapula downward, elevates ribs

Serratus anterior

O: anterior and superior margins of ribs 1-8/9
I:anterior surface of vertebral border of scapula
A: protract shoulder rotates scapula upward

trapezius

O: occipital bone, ligamentum nuchae, and spinous process of thoracic vertebrae.
I: clavicle, acromium process and spine of scapula.
A: Elevate, retract, depress and rotate scapula upward, elevate clavicle and extend neck

levator scapulae

O: transverse process of first four cervical vertebrae
I: vertebral border of scapula
A:elevates scapula

Rhomboid major

O:spinous process of superior thoracic vertebrae
I: vertebral border of scapula from spine to inferior angle
A: adducts scapula and performs downward rotation

Rhomboid minor

O: spinous process of vertebrae C7 - T1
I: vertebral border of scapula near spine
A: adducts scapula and performs downward rotation

subclavius

O: R1
I: inferior border of the clavicle
A:depresses and protracts shoulder

Pectoralis major

O: cartilages of Ribs 2-6, body of sternum, and inferior medial portion of clavicle
I: crest of greater tubercle and lateral lip of intertubercular groove of humerus
A: flexion, adduction and medial rotation at shoulder

Latissimus dorsi

O: spinous process of inferior thoracic and all lumbar vertebrae, ribs 8-12, and lumbodorsal fascia
I: floor of intertubercular groove of humerous
A: extension, adduction, and medial rotation at shoulder

deltoid

O: clavicle, acromion process and spine of scapula
I: deltoid tuberosity of humerus
A: abduction at shoulder, flexion and medial rotation, extension and lateral rotation

supraspinatus

O:supraspinous fossa of scapula
I:greater tubercle of humerus
A: abduction at shoulder

infraspinatus

O: infraspinous fossa of scapula
I: greater tubercle of humerus
A: lateral rotation at shoulder

teres major

O: inferior angle of scapula
I: intertubercular groove of humerus
A: extension, adduction and medial rotation at shoulder

teres minor

O: lateral border of scapula
I: greater tubercle of humerus
A: lateral rotation at shoulder

subscapularis

O: subscapular fossa of scapula
I: lesser tubercle of humerus
A: medial rotation at shoulder

coracobrachialis

O:coracoid process of the scapula
I: medial margin of shaft of humerus
A: adduction and flexion at shoulder

biceps brachii (short head)

O: coracoid process of the scapula
I: radial tuberosity
A: flexion at elbow and shoulder, supination

biceps brachii (long head)

O: supraglenoid tubercle of the scapula
I: radial tuberosity
A: flexion at elbow and shoulder, supination

brachialis

O: anterior distal surface of humerus
I: ulnar tuberosity
A: flexion at elbow

brachioradialis

O: ridge superior to the lateral epicondyle of humerus
I: lateral aspect of styloid process of radius
A: flexion at elbow

triceps brachii (lateral head)

O: superior lateral margin of humerus
I: olecranon process of ulna
A: extension at elbow

triceps brachii (long head)

O: infraglenoid tubercle of scapula
I: olecranon process of ulna
A: extension at elbow, extension and adduction at the shoulder

triceps brachii (medial head)

O: posterior surface of humerus inferior to radial groove, .
I:olecranon process of ulna
A: extension at elbow

anconeus

O: posterior inferior surface of lateral epicondyle of humerus
I:lateral margin of olecranon process of ulna
A: extension at elbow

pronator quadratus

O: anterior and medial surfaces of distal portion of ulna
I: anterolateral surface of distal portion of radius
A: pronation

pronator teres

O: medial epicondyle of humerus and coronoid process of ulna
I: midlateral surface of radius
A: pronation

supinator

O: lateral epicondyle of humerus, annular ligament and ridge of near radial notch of ulna
I: anerolateral surface of radius distal to the radial tuberosity
A: supination

flexor carpi radialis

O: medial epicondyle of humerus
I: bases of second and third metacarpals
A: flexion and abduction at wrist

flexor carpi ulnaris

O: medial epicondyle of humerus, adjacent medial surface of olecranon and anteromedial portion of ulna
I: pisiform, hamate and base of 5th Metacarpals
A: flexion and adduction at wrist

palmaris longus

O: medial epicondyle of humerus
I: palmar aponeurosis and flexor retinaulum
A: flexion at wrist

extensor carpi radialis longus

O: lateral supracondylar ridge of humerus
I: base of 2nd metacarpal
A: extension and abduction at wrist

extensor carpi radialis

O: lateral epicondyle of humerus
I: base of 3rd metacarpal
A: extension and abduction at wrist

extensor carpi ulnaris

O: lateral epicondyle of humerus, adjacent dorsal surface of ulna
I: base of 5th metacarpal
A: extension and adduction at wrist

extensor digitorum

O: lateral epicondyle of humerus
I: posterior surfaces of phalanges 2-5
A: extension at finger joint and wrist

Rectus Abdominus

O: superior surface of pubis around symphysis
I: inferior surfaces of costal cartilages of ribs 5-7 and xiphoid process
A: depresses ribs, flexes vertebral column, compresses abdomen

Spinalis thoracis

O: spinous processes of inferior thoracic and superior lumbar vertebrae
I: spinous processes of superior thoracic vertebra
A: extends vertebral column

longissimus thoracis

O: broad aponeurosis and transverse process of inferior thoracic and superior lumbar vertebrae, joins iliocostalis
I: transverse processes of superior vertebrae and inferior surface of ribs
A: extends verebral column, alone--each produces lateral flexion to that side.

illiocostalis thoracis

O: superior borders of inferior seven ribs medial to the angles
I: upper ribs and transverse processes of last cervical vertebrae
A: stabilizes thoracic vertebrae in extension

multifidus

O: sacrum and transverse process of each vertebra
I: spinous process of 3rd and 4th more superior vertebrae
A:extends vertebral column and rotates toward opposite side

quadratus lumborum

O: iliac crest and iliolumbar ligament
I: last rib and transverse process of lumbar vertebrae
A: depress ribs, alone each side laterally flexes vertebral column