MUSCLES OF THE BODY

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created 7 years ago by mmfisher559
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A&P I
updated 7 years ago by mmfisher559
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College: First year
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1

Epicranius-

Frontal Belly

O-Galea Aponeurotica

I- Skin of Eyebrows

A-Frontal Belly raise eyebrows

2

Epicranius

Occipital Belly

O-Occipital and Temporal Bones

I-Tissue of the eyelid

A-closes eyes, produces blinking and squinting

3

Buccinator

O-Molar region of maxilla and mandible

I-Orbicularis oris

A-Draws corner of mouth laterally; compresses cheek

4

Orbicularis Oculi

O-Frontal and Maxillary Bones and Ligaments

I-Tissue of Eyelid

5

Zygomaticus-major and minor

Zygomatic= Cheek Bone

O-Zygomatic Bone

I-Skin and Muscle at Corner of Mouth

A-Raises lateral corners of mouth upward (smiling muscle)

6

Masseter

O-Zygomatic Arch and maxilla

I-Angle and ramus of the mandible

A-Prime mover of jaw closure, elevates mandible

7

Temporalis

O-Temporal Fossa

I-Coronoid process of madible

A-Closes Jaw; elevates and retracts mandible

8

Platysma

Role in facial expression

O-Fascia of chest(over pectoral muscles) and deltoid

I-Lower margin of mandible, skin, and muscle at corner of mouth

A-Tenses skin of neck

9

Sternocleidomastoid

Two-headed muscle

O-Manubrium of sternum and medial portion of clavicle

I-Mastoid process of temporal bone

A-Simultaneous contraction of both muscles of pair, causes flexion of neck forward; acting independently,
rotates head toward shoulder on opposite side

10

Sternohyoid

O-Posterior Manubrium

I-Lower margin of body of hyoid bone

A-Depresses larynx and hyoid bone

11

Pectoralis Major

O-Clavicle, sternum, cartilage of ribs 1-6(or7)

I-Greater tubercle

A-Prime mover of arm flexion, adduct, medially rotates arm

12

Deltoid

O-Lateral 1/3 of clavicle; acromion and spine of scapula

I-Deltoid Tuberosity of humerus

A-Prime mover of arm abduction

13

External Intercostals

A-Pulls ribs toward one another to elevate rib cage;
aid in inspiration

14

Internal Intercostals

A-Draws ribs together to depress rib cage; aid in forced expiration

15

Diaphragm

broad muscle, forms floor of thoracic cavity
dome-shaped in relaxed state

A-Prime mover of inspiration; flattens on contraction

16

A. Rectus Abdominis

B. External Oblique

C. Internal Oblique

D. Transversus Abdominis

O-Pubic crest and Symphisis

I-Xiphoid process and costal cartilages of ribs 5-7

17

Trapezius

O-Occipital Bone*

18

Latissimus dorsi

O-Spinous process of lower six thoracic vertebrae,
lumbar vertebrae, last 3-4 ribs, and iliac crest

I-Intertubercular sulcus of humerus

A-Prime mover of arm extension ;adducts and medially rotates arm

19

Infraspinatus

Rotator Cuff Muscle*

20

Teres minor

Rotator Cuff Muscle*

21

Teres Major

Located inferior to teres minor*

22

Supraspinatus

Rotator Cuff Muscle

23

Erector spinae

A-Extend and bend vertebral column laterally

24

Triceps brachii

O-Long head-inferior margin of the glenoid cavity;
lateral head-proximal humerus; Medial head-distal
posterior humerus

I-Olecranon process of Ulna

A-Powerful forearm extensor

25

Biceps brachii

O-Short head; coracoid process; Superior Glenoid Rim

I-Radial Tuberosity

A-Flexion(powerful)of elbow and supination of forearm

26

Brachioradialis

A-Synergist in forearm flexion

C-forms lateral boundry of antecubital fossa

27

Brachialis

A-Major Flexor of forearm

C-Immediately deep to biceps brachii

28

Pronater teres

O-Medial epicondyle of humerus and coronoid process of ulna

I-Midshaft of Radius

A-pronate forearm

29

Flexor carpi radialis

O-Medial epicondyle of humerus

I-Base of metacarpals 2 and 3

A-Powerful flexor of wrist:abducts hand

30

Palmaris longus

O-Medial epicondyle of humerus

I-Palmar aponeurosis

A-Flexes wrist (weak)

31

Flexor carpi ulnaris

O-Medial epicondyle of the humerus and olecranon process and posterior surface of ulna

I-Base of metacarpal 5

A-Powerful flexor of wrist; sdducts hand

32

Flexor digitorum superficialis

O-Medial epicondyle of thehumerus

I-Middle phalanges of finger 2-5

A-Flexes wrist and middlephalanges of fingers 2-5

33

Flexor digitorum profundus

O-Anteromedial surface of ulna, interosseous membrane, and coronoid process

I-Distal phalanges of fingers 2-5

A-Sole muscle that flexes distal phalanges; assist in wrist flexion

34

Extensor carpi radialis longus

O- Lateral supracondyle ridge of the humerus

I-Base of metacarpal 2

A-Extends and abducts wrist

35

Extensor carpi radialis brevis

O-Lateral epicondlye of the humerus

I-Base of metacarpal 3

A-Extends and abducts wrist

36

Extensor digitorum

O-Lateral epicondlye of the humerus

I-By four tendons into distal phalanges of fingers 2-5

A-Prime mover of finger extension; extends wrist

37

Extensor carpi ulnaris

O-Lateral epicondlye of the humerus

I- Base of metacarpal5

A-Extends and adducts wrist

38

Supinator

O-Lateral epicondlye of the humerus; proximal ulna

I-Proximal end of radius

A-Supinate forearm

39

Iliopsoas-ilicus and psoas major

A-Flex trunk at thigh; major hip flexor

40

Sartorius

O-Anterior superior iliac spine

A-"Tailor's muscle" because it helps effect cross legged position in which tailors are often depicted

C-Straplike superficial muscle running obliquely across anterior surface of thigh to knee

41

Adductors-magnus, longus, and brevis

O-Ischial and pubis rami and body of pubis

I-Magnus-linea aspera, Longus and Brevis-linea aspera

A-Adduct and medially rotate and flex thigh

42

Gracilis

C- Straplike superficial muscle of medial thigh
Muscle transplant

43

Rectus femoris

part of quadriceps femoris

O-Anterior inferior iliac spine and superior margin of acetabulum

I-Tibial tuberosity and patella

A-Extends knee and flexes thigh at hip

C-Superficial muscle of thigh; runs straight down thigh; only muscle of group to cross hip joint

44

Vastus Laterali

part of quadriceps femoris

C-Forms lateral aspect of thigh; intramuscular injection site

45

Vastus Medialis

part of quadriceps femoris

C-Forms inferomedial aspect of thigh

46

Vastus Intermedius

part of quadriceps femoris

C. Obscured by rectus femoris; lies between vastus lateralis and vastus medialis on anterior thigh

47

Tensor fasciae latae

I- Iliotibial tract

C-Enclosed between fascia and layers of thigh

48

Gluteus Maximus

A-Complex powerful thigh extensor*

49

Gluteus medius

O-Upper lateral surface of ilium

I-Greater Trochanter of femur

A-Abducts and medially rotates thigh

50

Biceps Femoris

Part of Hamstring

O-Ischial tuberosity(long head); lineas aspera and distal femur (short head)

I-head of fibula and lateral condyle of tibia

A- extends thigh; flexes knee

C-Most lateral muscle of the group of three; arises from two heads

51

Semitendinosus

Part of Hamstring

C-Medial to biceps femoris

52

Semimembranosus

Part of Hamstring

C-Deep to semitendonosus

53

Fibularis Longus (peroneus)

C-Superficial lateral muscle; overlies fibula

54

Tibialis Anterior

O- Lateral condyle and upper 2/3 of tibia

I-First cuneiform and metatarsal 1

A-Prime mover of dorsiflexion; inverts foot

55

Superior and Inferior Extensor Retinacula

Muscle strap that crosses anterior aspect of ankle*

56

Triceps Surae

A- Plantar flex foot

C-refers to muscle pair (gastrnocnemius and Soleus)

57

Gastronocnemius

Paired with Soleus to form Triceps Surae

O- Medial and lateral condyles of the femur

I- Calcaneus via calcaneal tendon

A-plantar flexes foot; crosses knee joint; thus can flex knee

C.Superficial muscle of pair

58

Soleus

Paired with Gastronocnemius to form Triceps Surae

C- Deep to gastronocnemius

59

Popliteus

A-Extended knee when knee flexion begins