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Anatomy Exam 2 > Muscles > Flashcards

Flashcards in Muscles Deck (45):
1

External intercostal
Location

within intercostal spaces from tubercles of ribs to costochondral joints

2

External intercostal
attachments

inferior border of the rib above and superior border of the rib below

3

External intercostal
action

aid in inspiration (elevate the ribs, increase thoracic volume)

4

Internal intercostal
location

within intercostal spaces from angles of ribs to sternum

5

Internal intercostal
attachments

inferior border of the rib above and superior border of rib below

6

Internal intercostal
action

interosseus: aid in expiration (depress ribs, decrease thoracic volume)
interchondral: aid in inspiration (elevate ribs, increase thoracic volume)

7

Internal intercostal
innervation

Intercostal nerves (T1-T11)

8

External intercostal
innervation

Intercostal nerves (T1-T11)

9

Innermost intercostal
location

within lateral intercostal spaces

10

Innermost intercostal
attachments

inferior border of rib above and superior border of rib below

11

Innermost intercostal
action

aid in expiration (depress ribs; decrease thoracic volume)

12

Innermost intercostal
innervation

intercostal nerves (T1-T11)

13

Transversus thoracis
location

internal surface of anterior thoracic wall

14

Transversus thoracis
attachments

posterior surface of sternum and posterior surface of costal cartilages

15

Transversus thoracis
action

depress ribs (aid in expiration)

16

Transversus thoracis
innervation

intercostal nerves (T1-T11)

17

Subcostal
location

internal surface of posterior thoracic wall

18

Subcostal
attachments

inferior border of the ribs near angles and superior border of 2nd or 3rd rib inferior

19

Subcostal
action

depress ribs (expiration)

20

Subcostal
innervation

Intercostal nerves (T1-T11)

21

Diaphragm
location

divides thoracic and abdominopelvic cavities

22

Diaphragm
attachments

central tendon; posterior surface of xiphoid process; inferior ribs and their costal cartilages; anterior surface of vertebral bodies L1-L3

23

Diaphragm
innervation

Phrenic nerves (C3-C5)

24

Diaphragm
action

contraction during inspiration, forced contraction during defecation, urination, and childbirth

25

External oblique
attachments

lower ribs, linea alba, pubic crest, iliac crest

26

External oblique
action

compress abdomen; flex and rotate trunk

27

External oblique
innervation

lower intercostal nerves (T6-T11) and subcostal nerve (T12)

28

Internal oblique
attachment

thoracolumbar fascia, iliac crest, inguinal ligament, pubic bone, lower ribs, linea alba

29

Internal oblique
action

compress abdomen; flex and rotate trunk

30

Internal oblique
innervation

Lower intercostal nerves (T6-T11) subcostal nerve (T12), anterior rami of L1

31

Transverse abdominis
attachment

lower costal cartilages, thoracolumbar fascia, iliac crest, inguinal ligament, linea alba, public bone

32

Transverse abdominis
action

compress abdomen

33

Transverse abdominis
innervation

Lower intercostal nerves (T6-T11) subcostal nerve (T12), anterior rami of L1

34

Rectus abdominis
attachment

pubic symphysis, pubic bone, xiphoid process, lower costal cartilages

35

Rectus abdominis
action

compress abdomen, flex turnk

36

Rectus abdominis
innervation

Lower intercostal nerves (T6-T11) and subcostal nerve (T12)

37

Psoas major
attachments

Transverse processes and bodies of lumbar vertebrae, lumbar intervertebral discs, and lesser trochanter of femur

38

Psoas major
action

flex thigh, laterally flex vertebral column, flex vertebral column

39

Psoas major
innervation

Anterior rami of L1-L3

40

Iliacus
attachments

iliac fossa, ala of sacrum, lesser trochanter of femur

41

Iliacus
action

flexes thigh

42

Iliacus
innervation

Femoral nerve (L2-L4)

43

Quadratus lumborum
attachments

transverse processes of lumbar vertebrae, inferior border of rib 12, iliac crest

44

Quadratus lumborum
action

extend vertebral column, laterally flex vertebral column, stabilizes 12th rib during inspiration

45

Quadratus lumborum
innervation

Anterior rami of T12-L4