Muscles and Attachments of Trunk

Question 1

List the muscles of the thorax

Answer 1

internal and external intercostals, transversus thoracis

Question 2

List the muscles of the abdomen

Answer 2

Cremaster, diaphragm, external oblique, internal oblique, quadratus lumborum, rectus abdominis, transversus abdominis

Question 3

List the muscles of the pelvis

Answer 3

iliacus, psoas, piriformis, obturator internus, coccygeus, levator ani

Question 4

List the muscles of the perinuem

Answer 4

bulbospongiosus, ischiocavernosus, sphincter ani externus, sphincter urethrae, compressor urethrae, sphincter urethrovaginalis, deep transverse perineus, superficial transverse perineus

Question 5

What attaches to the body of the vertebrae?

Answer 5

psoas, diaphragm, ant. & post. longitudinal ligaments

Question 6

What is the function of the costal facet?

Answer 6

articulate with the rib

Question 7

What is the function of the vertebral foramen and canal?

Answer 7

houses spinal cord

Question 8

What is the function of the intervertebral foramen (made up of the inf and sup vertebral notches)?

Answer 8

transmits spinal nerves and radicular vessels

Question 9

What attaches to the transverse process?

Answer 9

erector spinae, psoas, levator scapulae and transversalis fascia

Question 10

What is the function of the costotubercular facet?

Answer 10

articulates with rib

Question 11

What is the function of the superior articular facet?

Answer 11

articulates with adjacent inferior articular facet

Question 12

What is the function of the inferior articular facet?

Answer 12

articulates with adjacent superior articular facet

Question 13

What attaches to the lamina?

Answer 13

ligamentum flavum

Question 14

What attaches to the spinous process?

Answer 14

trapezius, rhomboids, latissimus dorsi, spinalis of the erector spinae, transversospinalis (semispinalis, multifidus and rotatares)

Question 15

What is the function of the base of the sacrum?

Answer 15

articulates with the 5th lumbar vertebra

Question 16

What attaches to the promontory?

Answer 16

anterior longitudinal ligament

Question 17

What attaches to the pelvic surface?

Answer 17

piriformis

Question 18

What is the function of the pelvic sacral foramina?

Answer 18

transmits ventral rami of sacral nerves and lateral sacral arteries

Question 19

What attaches to the dorsal surface?

Answer 19

erector spinae, gluteus maximus, sacrotuberous ligament and sacrospinous ligament

Question 20

What is the function of the dorsal sacral foramina?

Answer 20

transmits dorsal rami of sacral nerves and lateral sacral nerves

Question 21

What attaches to the median sacral crest (i.e. spinous processes of the sacrum)?

Answer 21

erector spinae and gluteus maximus

Question 22

What attaches to the lateral sacral crest?

Answer 22

erector spinae and gluteus maximus muscles

Question 23

What is the function of the apex of the sacrum?

Answer 23

articulates with coccyx

Question 24

What attaches to the coccyx?

Answer 24

coccygeus muscle

Question 25

What is the function of the articular facet of the rib?

Answer 25

articulates with the body of the vertebrae

Question 26

What attaches to the shaft of the ribs?

Answer 26

pectoralis major (3-5), serratus anterior, external, internal and innermost intercostal muscles, diaphragm, external oblique, quadratus lumborum (12th)

Question 27

What is the function of the sacral canal?

Answer 27

houses sacral spinal roots

Question 28

What attaches to the angle of the rib?

Answer 28

iliocostalis of erector spinae muscle

Question 29

What is the function of the articular facet at the tubercle of the rib?

Answer 29

articulates with transverse process

Question 30

What is the function of the costal groove of the rib?

Answer 30

houses intercostal nerves, arteries and veins

Question 31

What attaches to the scalene tubercles on the 1st rib?

Answer 31

anterior scalene muscle

Question 32

What runs through the grooves for the subclavian artery and vein?

Answer 32

subclavian artery and vein (on 1st rib)

Question 33

What attaches to the manubrium?

Answer 33

pectoralis major

Question 34

What attaches to the body of the sternum?

Answer 34

pectoralis major and transversus thoracis

Question 35

What is the function of the clavicular notch and facet on the sternum

Answer 35

articulates with clavicle

Question 36

What is the function of the costal notches of the sternum body?

Answer 36

articulates with ribs 2-7

Question 37

What attaches to the xiphoid process of the sternum?

Answer 37

diaphragm and rectus abdominis

Question 38

What attaches to the iliac crest?

Answer 38

external oblique, internal oblique, transversus abdominis and quadratus lumborum

Question 39

What attaches to the anterior superior iliac spine?

Answer 39

inguinal ligament

Question 40

What traverses the greater sciatic notch?

Answer 40

piriformis, superior and inferior gluteal arteries, sciatic, pudendal, superior and inferior gluteal nerves

Question 41

What attaches to the iliopubic eminence?

Answer 41

pubofemoral ligament

Question 42

What attaches to the iliac fossa?

Answer 42

iliacus

Question 43

What attaches to the iliac tuberosity?

Answer 43

dorsal scaroiliac, interosseous scaroiliac and iliolumbar ligaments

Question 44

What attaches to the body of the pubis?

Answer 44

levator ani

Question 45

What attaches to the crest of the pubis?

Answer 45

rectus abdominis

Question 46

What attaches to the pubic tubercle?

Answer 46

rectus abdominis and inguinal ligament

Question 47

What attaches to the pectin pubis (pectineal line)?

Answer 47

conjoint tendon, and lacunar and pectineal ligaments

Question 48

What is the function of the obturator groove?

Answer 48

transmits obturator nerve, artery and vein

Question 49

What attaches to the inferior pubic ramus?

Answer 49

ischiocevernosus and compressor urethrae muscles

Question 50

What is the function of the lesser sciatic notch?

Answer 50

transmits obturator internus tendon, pudendal n, and internal pudendal artery and vein

Question 51

What attaches to the ischial spine?

Answer 51

levator ani, coccygeus m. and scarospinous ligament

Question 52

What attaches to the ischial ramus?

Answer 52

ischiocavernosus and compressor urethrae m.

Question 53

What attaches to the ischial tuberosity?

Answer 53

sacrotuberous ligament

Question 54

Attachment: cremaster muscle

Answer 54

medial edge of internal oblique to spermatic cord

Question 55

Attachment: diaphragm

Answer 55

xiphoid process, inner surface of lower ribs and costal cartilages, medial and lateral arcuate ligaments, and lumbar vertebrae through the central tendon

Question 56

Blood supply to border of the diaphragm

Answer 56

musculophrenic

Question 57

Primary blood supply to diaphragm

Answer 57

inferior phrenic

Question 58

Attachment: external oblique

Answer 58

lower 8 ribs to rectus sheath and iliac creat

Question 59

Action: external oblique

Answer 59

flexion and rot of trunk, compression of cavity

Question 60

Innervation of external oblique

Answer 60

ventral rami T7-12

Question 61

Blood supply of external oblique

Answer 61

superior epigastric, inferior epigastric, subcostal, lower posterior intercostal, lumbar, superficial circumflex, and deep circumflex iliac

Question 62

Attachment: int oblique

Answer 62

thoracolumbar fascia to inguinal ligament, iliac crest and rectus sheath

Question 63

Action: internal oblique

Answer 63

flexion and rot of trunk, compression of cavity

Question 64

Innervation: int oblique

Answer 64

lower thoracic and L1 ventral rami

Question 65

Blood supply int oblique

Answer 65

superior epigastric, inferior epigastric, subcostal, lower posterior intercostal, lumbar, superficial circumflex, and deep circumflex iliac

Question 66

Attachment: quadratus lumborum

Answer 66

12th rib to lilolumbar ligament and iliac crest

Question 67

Action: quadratus lumborum

Answer 67

extension and lateral flexion of the trunk, fixes 12th rib during inspiration

Question 68

Innervation: quadratus lumborum

Answer 68

ventral rami T12-L3

Question 69

Blood supply: quadratus lumborum

Answer 69

subcostal, lumbar and iliolumbar

Question 70

Attachment: rectus abdominis

Answer 70

xiphoid process and adj. costal cartilages to pubic crest and tubercle

Question 71

Action: rectus abdominis

Answer 71

flexion of trunk and compression of cavity

Question 72

Innervation: rectus abdominis

Answer 72

lower thoracic ventral rami

Question 73

Blood supply: rectus abdominis

Answer 73

superior and inferior epigastric

Question 74

Attachment: transversus abdominis

Answer 74

lower six costal cartilages and thoracolumbar fascia to inguinal ligament, iliac crest and rectus sheath

Question 75

Action: transversus abdominis

Answer 75

compression of cavity

Question 76

Innervation: transversus abdominis

Answer 76

lower thoracic and L1 ventral rami

Question 77

Blood supply: transversus abdominis

Answer 77

superior epigastric, inferior epigastric, subcostal, lower posterior intercostal, lumbar, superficial circumflex iliac and deep circumflex iliac

Question 78

Attachment: Coccygeus

Answer 78

ischial spine and sacrospinous ligament to coccyx

Question 79

Action: Coccygeus

Answer 79

supports and compresses posterior pelvic floor

Question 80

Innervation:Coccygeus

Answer 80

ventral rami S4-S5

Question 81

Blood supply: Coccygeus

Answer 81

inf gluteal, int pudendal, and inf rectal

Question 82

Attachment: levator ani

Answer 82

pubic symphysis, obturator fascia and ischial spine to midline raphe and anoccygeal ligament

Question 83

Actions: levator ani

Answer 83

supports pelvic viscera and compresses rectum and vagina

Question 84

Innervation: levator ani

Answer 84

pudendal nerve (inf rectal branches) and S4

Question 85

Blood supply: levator ani

Answer 85

inf gluteal, internal pudendal, inf rectal and inf vesical