Origins, insertions, actions of Muscles Flashcards Preview

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1

O, I, A OF ORBICULARIS ORIS

ORIGIN: SEVERAL FACIAL MUSCLES, MANDIBLE, MAXILLA

iNSERTION: LIPS

ACTION: CLOSES AND PUCKERS LIPS

2

ORBICULARIS ORIS O,I,A

ORIGIN: FRONTAL AND MAXILLA BONES

INSERTION: EYELIDS

ACTION: CLOSES EYELIDS

3

FRONTALIS O,I,A

ORIGIN: APONEUROSIS(EPICRANIAL)

INSERTION: SOFT TISSUE UNDER THE EYEBROWS

ACTION: ELEVATES EYEBROWS AND WRINKLES FOREHEAD

4

OCCIPITALIS O,I,A

ORIGIN: MASTOID PROCESS AND OCCIPITAL BONE

INSERTION: APONEUROSIS (EPICRANIAL)

ACTION: PULLS SCALP BACKWARD

5

O, I, A OF ZYGOMATICUS

ORIGIN: ZYGOMATIC ARCH

INSERTION: ORBICULARIS ORIS AT CORNER OF MOUTH

ACTION: ELEVATES AND ABDUCTS THE UPPER LIP AS IN SMILING AND LAUGHING

6

O, I , A OF TRIANGULARIS

ORIGIN: MANDIBLE
INSERTION: ORBICULARIS ORIS AT CORNER OF MOUTH

ACTION: DEPRESSES MOUTH

7

PLATYSMA O, I, A

ORIGIN: FASCIA OF UPPER CHEST AND SHOULDER

INSERTION: MANDIBLE AND MUSCLES AROUND THE MOUTH

ACTION: DEPRESSES THE LOWER LIP AND ASSISTS IN OPENING THE MOUTH

8

BUCCINATOR OIA

ORIGIN: MANDIBLE AND MAXILLA
INSERTION: ORBICULARIS ORIS AT CORNER OF MOUTH
ACTION: COMPRESSES THE CHEEK, HOLDS FOOD BETWEEN TEETH DURING CHEWING, AND INTERACTS WITH OTHER MUSCLES IN FACIAL EXPRESSIONS

9

MASSETER OIA

ORIGIN: ZYGOMATIC ARCH

INSERTION: LATERAL SURFACE OF RAMUS AND ANGLE OF MANDIBLE

ACTION: ELEVATES THE MANDIBLE

10

TEMPORALIS OIA

ORIGIN: TEMPORAL, PARIETAL, AND FRONTAL BONES

INSERTION: CORONOID PROCESS OF MANDIBLE

ACTION: ACTS SYNERGISTICALLY WITH THE MASSETER TO ELEVATE MANDIBLE

11

STERNOCLEIDOMASTOID OIA

ORIGIN: STERNUM AND MEDIAL END OF CLAVICLE

INSERTION: MASTOID PROCESS

ACTION: CONTRACTION OF BOTH MUSCLES FLEXES THE HEAD DOWN TOWARD THE CHEST. CONTRACTION OF ONE MUSCLE ONLY LATERALLY ROTATES HEAD AWAY FROM THE SIDE OF THE CONTRACTING MUSCLE

12

PECTORALIS MAJOR OIA

ORIGIN: CLAVICLE, STERNUM, COSTAL CARTILAGES, AND APONEUROSIS OF EXTERNAL OBLIQUE

INSERTION: ALONG GROOVE BETWEEN GREATER AND LESSER TUBERCLES OF HUMERUS

ACTION: ADDUCTION AND MEDIAL ROTATION OF UPPER ARM

13

DELTOID OIA

ORIGIN: ACROMION AND SPINE OF SCAPULA

INSERTION: DELTOID TUBEROSITY OF HUMERUS

ACTION: FLEXION, ABDUCTION, AND EXTENSION OF UPPER ARM

14

SERRATUS ANTERIOR OIA

ORIGIN: UPPER EIGHT OR NINE RIBS
INSERTION: MEDIAL BORDER OF THE SCAPULA

ACTION: PULLS SCAPULA DOWNWARD AND FORWARD TOWARD THE CHEST

15

EXTERNAL INTERCOSTALS

ORIGIN: LOWER BORDER OF THE UPPER RIB
INSERTION: UPPER EDGE OF THE LOWER RIB

ACTION: ELEVATE RIB CAGE AND INCREASE VOLUME OF THE THORAX, RESULTING IN INSPIRATION OF AIR IN BREATHING

16

INTERNAL INTERCOSTALS

ORIGIN: UPPER BORDER OF THE LOWER RIB

INSERTION: LOWER EDGE OF UPPER RIB

ACTION: DEPRESS RIB CAGE AND DRAW RIBS CLOSER TOGETHER. DECREASES VOLUME OF THORAX, CAUSING EXPIRATION OF AIR IN BREATHING

17

EXTERNAL OBLIQUE

ORIGIN: SUPERFICIAL MUSCLE ON LOWER EIGHT RIBS

INSERTION: ILIAC CREST AND LINEA ALBA

ACTION: COMPRESS THE ABDOMINAL ORGANS, AND MAINTAIN OR INCREASE INTRAABDOMINAL PRESSURE, AIDING IN URINATION, DEFECATION, AND CHILDBIRTH. ANTAGONISTS TO DIAPHRAGM AND AID IN FORCING AIR FROM THE LUNGS

18

INTERNAL OBLIQUE

ORIGIN: ILIAC CREST AND INGUINAL LIGAMENT

INSERTION: COSTAL CARTILAGES OF LOWER 3 RIBS

ACTION: COMPRESS THE ABDOMINAL ORGANS, AND MAINTAIN OR INCREASE INTRAABDOMINAL PRESSURE, AIDING IN URINATION, DEFECATION, AND CHILDBIRTH. ANTAGONISTS TO DIAPHRAGM AND AID IN FORCING AIR FROM THE LUNGS

19

TRANSVERSUS ABDOMINIS

ORIGIN: INGUINAL LIGAMENT, ILIAC CREST, AND COSTAL CARTILAGES OF LOWER SIX RIBS

INSERTION: LINEA ALBA AND PUBIC CREST

ACTION: COMPRESS THE ABDOMINAL ORGANS, AND MAINTAIN OR INCREASE INTRAABDOMINAL PRESSURE, AIDING IN URINATION, DEFECATION, AND CHILDBIRTH. ANTAGONISTS TO DIAPHRAGM AND AID IN FORCING AIR FROM THE LUNGS

20

RECTUS ABDOMINIS

ORIGIN: PUBIC BONE

INSERTION: XIPHOID PROCESS AND CARTILAGES OF THE FIFTH, SIXTH, AND SEVENTH RIBS

ACTION: AIDS IN FLEXION OF TRUNK IN LUMBAR REGION;;;;COMPRESS THE ABDOMINAL ORGANS, AND MAINTAIN OR INCREASE INTRAABDOMINAL PRESSURE, AIDING IN URINATION, DEFECATION, AND CHILDBIRTH. ANTAGONISTS TO DIAPHRAGM AND AID IN FORCING AIR FROM THE LUNGS

21

TRAPEZIUS

ORIGIN: OCCIPITAL BONE AND SPINOUS PROCESS OF CERVICAL AND THORACIC VERTEBRAE

INSERTION: SPINE AND ACROMION PROCESS OF SCAPULA AND ON LATERAL THIRD OF CLAVICLE

ACTION: ADDUCTS AND ELEVATES SCAPULA; PULLS HEAD BACKWARD (HYPEREXTENSION) IF SCAPULAE ARE FIXED

22

LATISSIMUS DORSI

ORIGIN: LARGE APONEUROSIS ATTACHED TO THORACIC AND LUMBAR VERTEBRAE

INSERTION: GROOVE BETWEEN THE GREATER AND LESSER TUBERCLES OF THE HUMERUS

ACTION: EXTENDS, ADDUCTS, AND ROTATES ARM MEDIALLY; PULLS SHOULDER DOWNWARD AND BACKWARD

23

INFRASPINATUS

ORIGIN: INFERIOR MARGIN OF SPINE AND POSTERIOR SURFACE OF SCAPULA

INSERTION: GREATER TUBERCLE OF HUMERUS

ACTION: ROTATES UPPER ARM LATERALLY

24

SUPRASPINATUS

ORIGIN: FOSSA SUPERIOR TO THE SCAPULAR SPINE

INSERTS: GREATER TUBERCLE OF HUMERUS

ACTION: ASSISTS DELTOID IN ABDUCTING UPPER ARM

25

TERES MAJOR

ORIGIN: POSTERIOR SURFACE OF SCAPULA

INSERTION: LESSER TUBERCLE OF HUMERUS

ACTION: ROTATES UPPER ARM MEDIALLY

26

CORACOBRACHIALIS

ORIGIN: CORACOID PROCESS OF THE SCAPULA

INSERTION: MIDDLE MEDIAL SURFACE OF THE HUMERUS

ACTION: FLEXES AND ADDUCTS UPPER ARM

27

BICEPS BRACHII

ORIGIN: 2 PLACES ON THE SCAPULA= CORACOID PROCESS AND THE TUBERCLE SUPERIOR TO THE GLENOID CAVITY

INSERTION: RADIAL TUBEROSITY

ACTION: FLEXES FOREARM; ROTATES FOREARM LATERALLY (SUPINATION)

28

BRACHIALIS

ORIGIN: LOWER HALF OF THE HUMERUS

INSERTION: CORONOID PROCESS OF THE ULNA

ACTION: FLEXES THE FOREARM

29

BRACHIORADIALIS

ORIGIN: LATERAL EPICONDYLE OF THE HUMERUS

INSERTION: LATERAL SURFACE OF THE RADIUS JUST ABOVE THE STYLOID PROCESS

ACTION: FLEXES THE FOREARM

30

TRICEPS BRACHII

ORIGIN: 3 SITES= THE TUBERCLE BELOW THE GLENOID CAVITY, AND THE POSTERIOR AND MEDIAL SURFACES OF THE HUMERUS.

INSERTION: OLECRANON PROCESS OF THE ULNA

ACTION: EXTENDS THE FOREARM

31

SUPINATOR

ORIGIN: LATERAL EPICONDYLE OF THE HUMERUS AND THE PROXIMAL CREST OF THE ULNA.

INSERTION: LATERAL MARGIN OF THE RADIAL TUBEROSITY

ACTION: ROTATES FOREARM LATERALLY (SUPINATION)

32

PRONATOR TERES

ORIGIN: MEDIAL EPICONDYLE OF THE HUMERUS

INSERTION: PROXIMAL LATERAL SURFACE OF THE RADIUS

ACTION: ROTATES FOREARM MEDIALLY (PRONATION)

33

PRONATOR QUADRATUS

ORIGIN: DISTAL PART OF THE ULNA

INSERTION: DISTAL LATERAL PART OF THE RADIUS

ACTION: PRONATES FOREARM

34

FLEXOR CARPI RADIALIS

ORIGIN: FROM THE MEDIAL EPICONDYLE OF THE HUMERUS AND EXTENDS DIAGONALLY ACROSS THE ARM WHERE ITS TENDON DIVIDES TO INSERT

INSERTION: PROXIMAL ENDS OF THE SECOND AND THIRD METACARPALS

ACTION: FLEXES AND ABDUCTS THE HAND

35

FLEXOR CARPI ULNARIS

ORIGIN: MEDIAL EPICONDYLE OF THE HUMERUS

INSERTION: PROXIMAL END OF THE FIFTH METACARPAL

ACTION: FLEXES AND ADDUCTS THE HAND

36

FLEXOR DIGITORUM SUPERFICIALIS

ORIGIN: HUMERUS, ULNA, AND RADIUS

INSERTION: MIDDLE PHALANGES OF FINGERS 2-5

ACTION:FLEXES MIDDLE PHALANGES OF FINGERS 2-5

37

FLEXOR DIGITORUM PROFUNDUS

ORIGIN: ANTERIOR SURFACE OF THE ULNA

INSERTION: ON THE DISTAL PHALANGES OF FINGERS 2-5

ACTION: FLEXES DISTAL PHALANGES OF FINGERS 2-5

38

FLEXOR POLLICIS LONGUS

ORIGIN: RADIUS AND ULNA

INSERTION: DISTAL PHALANX OF THE THUMB

ACTION: FLEXES THE THUMB

39

EXTENSOR CARPI RADIALIS LONGUS AND BREVIS

BOTH ORIGINATE: LATERAL EPICONDYLE OF THE HUMERUS

INSERTION: LONGUS= PROXIMAL END OF THE SECOND METACARPAL. BREVIS= PROXIMAL END OF THE THIRD METACARPAL.

ACTION: BOTH MUSCLES EXTEND AND ABDUCT THE HAND

40

EXTENSOR CARPI ULNARIS

ORIGIN: LATERAL EPICONDYLE OF THE HUMERUS

INSERTION: BASE OF THE 5TH METACARPAL

ACTION: EXTENDS FINGERS 2-5

41

EXTENSOR DIGITORUM

ORIGIN: LATERAL EPICONDYLE OF THE HUMERUS

INSERTION: POSTERIOR SURFACE OF DISTAL PHALANGES OF FINGERS 2-5

ACTION: EXTENDS FINGERS 2-5

42

EXTENSOR POLLICIS LONGUS

ORIGIN: RADIUS AND ULNA

INSERTION: DISTAL PHALANX OF THE THUMB

ACTION: EXTENDS THE THUMB

43

ABDUCTOR POLLICIS

ORIGIN: INTEROSSEUS LIGAMENT BETWEEN THE RADIUS AND ULNA

INSERTION: LATERAL SURFACE OF THE FIRST METACARPAL

ACTION: ABDUCTS THE THUMB

44

GLUTEUS MAXIMUS

ORIGIN: ILIUM, SACRUM, AND COCCYX

INSERTION: POSTERIOR SURFACE OF THE FEMUR AND ILIOTIBIAL TRACT

ACTION: EXTENDS AND LATERALLY ROTATES THE THIGH

45

ILIOTIBIAL TRACT

A BROAD TENDON EXTENDING FROM THE GLUTEUS MAXIMUS MUSCLE TO THE TIBIA

46

GLUTEUS MEDIUS AND GLUTEUS MINIMUS

ORIGIN: ILIUM

INSERTION: GREATER TROCHANTER OF THE FEMUR

ACTION: ABDUCT AND MEDIALLY ROTATE THE THIGH

47

PIRIFORMIS

ORIGIN: ANTERIOR SURFACE OF THE SACRUM

INSERTION: GREATER TROCHANTER OF THE FEMUR

ACTION: ABDUCTS AND LATERLLY ROTATES THE THIGH

48

ADDUCTOR LONGUS AND ADDUCTOR BREVIS

BOTH ORIGINATE: THE PUBIS

BOTH INSERT: POSTERIOR SURFACE OF THE FEMUR. THE ADDUCTOR BREVIS IS SHORTER AND INSERTS SUPERIOR TO THE ADDUCTOR LONGUS

ACTION: ADDUCT, FLEX, AND LATERALLY ROTATE THE THIGH.

49

ADDUCTOR MAGNUS

ORIGIN: ISCHIUM AND PUBIS

INSERTION: POSTERIOR SURFACE AND MEDIAL EPICONDYLE OF THE FEMUR

ACTION: ADDUCTS, FLEXES, AND LATERALLY ROTATES THE THIGH

50

WHAT MUSCLES ARE KNOWN AS THE HAMSTRINGS?

BICEPS FEMORIS, SEMIMEMBRANOSUS, SEMITENDINOSUS

51

BICEPS FEMORIS

ORIGIN: ISCHIAL TUBEROSITY AND THE POSTERIOR SURFACE OF THE FEMUR

INSERTION: HEAD OF THE FIBULA AND LATERAL EPICONDYLE OF THE TIBIA

ACTION: FLEX LOWER LEG, EXTEND THIGH, LATERALLY ROTATES THIGH

52

SEMIMEMBRANOSUS

ORIGIN: ISCHIAL TUBEROSITY

INSERTION: POSTERIOR SURFACE OF THE MEDIAL EPICONDYLE OF THE TIBIA

ACTION: FLEX LOWER LEG, EXTEND THIGH, AND ROTATE THE THIGH MEDIALLY

53

SEMITENDINOSUS

ORIGIN: ISCHIAL TUBEROSITY

INSERTION: UPPER MEDIAL SURFACE OF THE TIBIA

ACTION: FLEX LOWER LEG, EXTEND THIGH, AND ROTATE THE THIGH MEDIALLY

54

WHAT MUSCLES ARE KNOWN AS THE QUADRICEPS FEMORIS?

RECTUS FEMOIS, VASTUS LATERALIS, VASTUS MEDIALIS, VASTUS INTERMEDIUS

55

RECTUS FEMORIS

ORIGIN: ANTERIOR INFERIOR ILIAC SPINE

INSERTION: TIBIAL TUBEROSITY

ACTION: EXTENDS THE LOWER LEG AND FLEXS THIGH

56

VASTUS LATERALIS

ORIGIN: GREATER TROCHANTER AND POSTERIOR SURFACE OF THE FEMUR

INSERTION: TIBIAL TUBEROSITY

ACTION: EXTENDS LOWER LEG

57

VASTUS MEDIALIS

ORIGIN: POSTERIOR SURFACE OF THE FEMUR

INSERTION: TIBIAL TUBEROSITY

ACTION: EXTENDS LOWER LEG

58

VASTUS INTERMEDIUS

ORIGIN: ANTERIOR AND LATERAL SURFACES OF THE FEMUR

INSERTION: TIBIAL TUBEROSITY

ACTION: EXTENDS LOWER LEG

59

SARTORIUS

ORIGIN: ANTERIOR SUPERIOR SPINE OF THE ILIUM

INSERTION: PROXIMAL MEDIAL SURFACE OF THE TIBIA

ACTION: FLEXES LOWER LEG AND THIGH, ROTATES THE THIGH LATERALLY AND THE LEG MEDIALLY

60

TENSOR FASCIAE LATAE

ORIGIN: ANTERIOR ILIAC CREST

INSERTION: ILIOTIBIAL TRACT

ACTION: FLEXS AND ABDUCTS THIGH

61

GRACILIS

ORIGIN: LOWER EDGE OF PUBIS

INSERTION: PROXIMAL MEDIAL SURFACE OF THE TIBIA

ACTION: ADDUCTS THE THIGH AND FLEXES THE LEG.

62

GASTROCNEMIUS

ORIGIN: LATERAL AND MEDIAL CONDYLES OF THE FEMUR

INSERTION: POSTERIOR SURFACE OF THE CALCANEUS

ACTION: FLEXES LEG, PLANTAR FLEXES FOOT

63

SOLEUS

ORIGIN: THE HEAD OF THE POSTERIOR SURFACE OF THE FIBULA AND SHAFT OF THE TIBIA

INSERTION: THE CALCANEUS ( ITS TENDON UNITES WITH THE TENDON THE GASTROCNEMIUS TO FORM THE ACHILLES TENDON)

ACTION: PLANTAR FLEXES THE FOOT

64

TIBIALIS ANTERIOR

ORIGIN: ANTERIOR SURFACE OF THE LATERAL CONDYLE AND UPPER 2/3 OF THE TIBIA

INSERTION: INFERIOR SURFACE OF A TARSAL BONE AND THE FIRST METATARSAL ( IT CROSSES OVER AT THE ANKLE TO INSERT)

ACTION: PRODUCES DORSIFLEXION AND INVERSION OF THE FOOT

65

TIBIALIS POSTERIOR

ORIGIN: POSTERIOR SURFACES OF THE TIBIA AND FIBULA

INSERTION: INFERIOR SURFACES OF SEVERAL TARSAL BONES AND METATARSAL BONES 2-4

ACTION: PLANTAR FLEXES AND INVERTS THE FOOT

66

FIBULARIS LONGUS (PERONEUS LONGUS)

ORIGIN: THE HEAD AND PROXIMAL PORTION OF THE FIBULA

INSERTION: FIRST METATARSAL AND A TARSAL BONE (THE TENDON PASSES UNDER THE ARCH OF THE FOOT TO INSERT)

ACTION: PLANTAR FLEXES AND EVERTS THE FOOT, SUPPORTS TRANSVERSE ARCH.

67

FIBULARIS BREVIS (PERONEUS BREVIS)

ORIGIN: MIDDLE PORTION OF THE FIBULA

INSERTION: LATERAL PROXIMAL MARGIN OF THE 5TH METATARSAL

ACTION: PLANTAR FLEXES AND EVERTS THE FOOT

68

FIBULARIS TERTIUS (PERONEUS TERTIUS)

ORIGIN: LOWER PORTION OF THE FIBULA

INSERTION: MEDIAL PROXIMAL MARGIN OF THE 5TH METATARSAL

ACTION: DORSIFLEXES AND EVERTS

69

FLEXOR HALLUCIS LONGUS

ORGIN: LOWER 2/3 OF THE FIBULA

INSERTION: DISTAL PHALANX OF THE GREAT TOE (TENDON RUNS DIAGONALLY UNDER THE FOOT TO INSERT)

ACTION: FLEXES THE GREAT TOE, AIDS IN PLANTAR FLEXION OF THE FOOT

70

FLEXOR DIGITORUM LONGUS

ORIGIN: LOWER 2/3 OF THE MEDIAL POSTERIOR SURFACE OF THE TIBIA

INSERTION: DISTAL PHALANGES OF THE TOES 2-5 ( TENDON PASSES ALONG THE BOTTOM OF THE FOOT AND DIVIDES TO INSERT)

ACTION: FLEXES TOES 2-5, AIDS IN PLANTAR FLEXION OF THE FOOT

71

EXTENSOR DIGITORUM LONGUS

ORIGIN: LATERAL CONDYLE OF THE TIBIA AND THE ANTERIOR SURFACE OF THE FIBULA

INSERTION: UPPER SURFACES OF THE SECOND AND THIRD PHALANGES OF TOES 2-5

ACTION: EXTENDS TOES 2-5, AIDS IN DORSIFLEXION OF THE FOOT

(IT LIES LATERAL AND POSTERIOR TO THE TIBIALIS ANTERIOR)

72

EXTENSOR HALLICUS LONGUS

ORIGIN: ANTERIOR SURFACE OF THE FIBULA

INSERTION: UPPER SURFACE OF THE DISTAL PHALANX OF THE GREAT TOE

ACTION: EXTENDS THE GREAT TOE, AIDS IN DORSIFLEXION OF THE FOOT.