Muscles and Functions

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created 8 years ago by xley04x
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Lab Exam 1 Muscles
updated 8 years ago by xley04x
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1

Gluteus Maximus

Hip Region; extends and rotates thigh laterally at hip

2

Gluteus Medius

Hip Region; abducts and rotates thigh medially at hip

3

Iliotibial Band (IT band)

Connects to tensor fascia lata; band from ilium to tibia (lateral)

4

Tensor Fascia Lata

Hip Region; abduction

5

Biceps Femoris

Hamstrings; Flexes leg at knee, rotates leg laterally, extends thigh

6

Semitendinosus

Hamstrings; Flexes leg at knee, rotates leg medially, extends thigh

7

Semimembranosus

Hamstrings; Flexes leg at knee, rotates leg medially, extends thigh

8

Rectus Femoris

Quadriceps; extends leg at knee

9

Vastus Lateralis

Quadricepts; extends leg at knee

10

Vastus Medialis

Quadriceps; extends leg at knee

11

Vastus Intermedius

Quadriceps; extends leg at knee (fused with rectus femoris)

12

Sartorius

Thigh; oblique muscle, flexion of knee, external rotation of hip, flexes leg and thigh, abducts and rotates thigh laterally

13

Gracilis

Thigh; adducts thigh, flexes, and roates leg at knee

14

Adductor Magnus (Femoris)

Thigh; adducts, flexes, and rotates thigh laterally

15

Adductor Longus

Thigh; adducts, flexes, and rotates thigh laterally

16

Pectineus

Thigh; adducts and flexes thigh

17

Gastrocnemius

Calf Muscle; plantar flexion of foot

18

Soleus

Calf Muscle; planter flexion of foot

19

Tibialis Anterior

Dorsi flexion, located right in front of calf muscles

20

External Abdominal Oblique

Tenses abdominal wall and compresses abdominal contents, lateral rotation of trunk

21

Internal Abdominal Oblique

Tenses abdominal wall and compresses abdominal contents, lateral rotation of trunk

22

Transverses Abdominis

Tenses abdominal wall and compresses abdominal contents

23

Rectus Abdominis

Tenses abdominal wall and compresses abdominal contents, flexes vertebral column

24

Erector Spinal

3 muscles in back, what do they do?

25

Pectoralis Major

Chest Region; flexes, adducts, and rotates arm medially

26

Pectoralis Minor

Chest Region; raises ribs or pulls scapulae forward and downward

27

External Intercostals

Chest Region; raises ribs (important in breathing)

28

Internal Intercostals

Chest Region; what do they do?

29

Latissimus Dorsi

Back/Shoulder Region; extends, adducts, and rotates arm medially or pulls shoulder downward and back

30

Trapezius

Back/Shoulder Region; rotates, raises, and lowers scapulae and pulls scapulae medially, extends head

-from occipital bone to T7 and to each shoulder

31

Rhomboideus

Back Region; located right under Trapezius; adducts scapula, pulls scapula back

32

Deltoid

Shoulder Region; abducts, extends, and flexes arm at shoulder

33

Triceps Brachii

Upper Arm Region; extends forearm at elbow

34

Biceps Brachii

Upper Arm Region; flexes forearm at elbow

35

Brachialis

Upper Arm Region; flexes forearm at elbow

36

Scalene Group

Head; prime flexor anterior & posterior, lateral rotation of head, flexion of neck

37

Serratus Anterior

Upward rotation of scapula

38

Define SITS and their functions

Supraspinatus: flex, abduct
Infraspinatus: rotate, abduct
Teres Minor: rotate
Subscapularis: rotate, abduct

All are rotator cuff muscles

39

Teres Major

Not a rotator cuff muscle, abduction of arm and rotation of arm

40

Sternocleidomastoid

Primary rotator of head, contralateral rotation; rotates head to one side, flexes neck, or elevates sternum

41

Messeter

Raises the jaw (used in chewing)

42

Temporalis

Closes the jaw (used in chewing)

43

Orbicularis Oris

Closes lips, protrudes lips (as for kissing)

44

Orbicularis Oculi

Closes eye

45

Zygomaticus

Raises corner of mouth (as in smiling)

46

Frontalis
Occipitalis

Work together to raise eyebrowns and wrinkle the skin of the forehead (the muscles are united by a broad, tendinous membrane that covers the top of the skull like a cap)