Muscular System Part 1

Front 1

Rectus

Back 1

fibers run straight

Front 2

Transverse

Back 2

fibers run at right angles

Front 3

Oblique

Back 3

fibers run obliquely

Front 4

Maximus

Back 4

largest

Front 5

Minimus

Back 5

smallest

Front 6

Longus

Back 6

longest

Front 7

Brevis

Back 7

shortest

Front 8

Name the origin and insertion of the sternocleidomastoid

Back 8

the sternum and clavicle are the origins and the insertion is the mastoid process

Front 9

Shape of deltoid

Back 9

triangular

Front 10

Shape of Trapezius

Back 10

Trapezoid

Front 11

adductor

Back 11

brings a part toward the midline

Front 12

Abductor

Back 12

draws a part away from the midline

Front 13

Flexor

Back 13

flexes

Front 14

Extensor

Back 14

extends

Front 15

Origin

Back 15

where the muscle originates

Front 16

Belly

Back 16

main part, thickest part of the muscle

Front 17

Insertion

Back 17

opposite end of the origin, usually crosses at least one joint

Front 18

Skeletal Muscle

Back 18

attached to the skeletal system and is responsible for the movement of bones. Skeletal Muscle tissue is voluntary

Front 19

Cardiac Muscle

Back 19

Forms the majority of the heart walls and is found only in the heart. Involuntary. Most easily identified with the intercalated discs.

Front 20

Smooth Muscle

Back 20

Is found along the GI tract, Involuntary and nonstriated

Front 21

Muscle Fiber

Back 21

composed of repeating units of sacromeres. Filled with sarcoplasm in empty areas.

Front 22

Where are sarcomeres found?

Back 22

in the sarcolema

Front 23

Myofibril

Back 23

bundled unit of myofiliments

Front 24

Sarcomere

Back 24

unit of myofiliments consisting of thin and think filaments

Front 25

Fasicles

Back 25

bundles of fibers

Front 26

Endomysium

Back 26

outer membrane of fasicle

Front 27

Perimysium

Back 27

outer membrane of a group of fasicles,

Front 28

Epimysium

Back 28

bundles fasicles are surrounded by the empimysium

Front 29

Tendon

Back 29

anchors muscles to bone or muscle to muscle, made of fibrous connective tissue that anchors into the periosteum of the bone

Front 30

Muscles of the Head

Back 30

promote facial expression, insert into the skin or other muscles not bone

Front 31

Frontal belly/ frontalis function

Back 31

wrinkles forehead skin horizontally

Front 32

Occipital belly, occipitalis function

Back 32

pull scalp posteriorly

Front 33

Temporalis function

Back 33

helps with movement of mandible

Front 34

Orbicularis oculi function

Back 34

aids in blinking and squinting

Front 35

Zygomaticus function

Back 35

raises lateral corners of the mouth

Front 36

Orbicularis oris function

Back 36

kissing and whistling muscle, purses and protrudes lips

Front 37

Masseter function

Back 37

chewing muscle, closes jaw and elevates mandible

Front 38

Sternocleidomastoid function

Back 38

rotates head, flexes head

Front 39

Pectoralis major function

Back 39

prime mover of arm, arm adductor

Front 40

Deltoid

Back 40

abducts arm

Front 41

Trapezius

Back 41

stabilizes, rotates, retracts scapula

Front 42

Latissimus dorsi

Back 42

adducts arm, depresses scapula

Front 43

Infraspinatus

Back 43

helps to hold the head of the humerus in the glenoid cavity, stabilizes shoulder joint, rotates humerus laterally

Front 44

Supraspinatus

Back 44

stabilizes shoulder, in abduction. Origin is the supraspinous fossa of the scapula and Insertion is the greater tubercle of the humerus

Front 45

Erector Spinae muscles and functions

Back 45

Longissimus, Iliocostalis, and Spinalis Group, extend and bend the vertebral column

Front 46

Triceps brachii

Back 46

forearm extensor

Front 47

Biceps brachii

Back 47

forearm flexor, Origin is the coracoid process of scapula and Insertion is the radial tuberosity of radius

Front 48

Brachialis

Back 48

forearm flexor

Front 49

Brachioradialis

Back 49

forearm flexor

Front 50

Name the first 3 muscles involved in flexing the wrist

Back 50

Flexor carpi radialis, flexor carpi ulnaris, palmaris longus

Front 51

Extensor Carpi Ulnaris

Back 51

adducts wrist

Front 52

Extensor digitorum

Back 52

flaring fingers, abducts fingers