Muscles of Thorax/Abdomen

Question 1

The ______ muscle attaches to the medial edge of the internal oblique and the spermatic cord

Answer 1

cremaster

Question 2

Transversus thoracis attaches from the ______ sternum to the ______

Answer 2

posterior, costal cartilages

Question 3

The external oblique is innervated by ventral rami ____.

Answer 3

T7-12

Question 4

The internal intercostal muscle fibers run ______.

Answer 4

superior-medial to inferior-lateral (mountain pose orientation)

Question 5

The diaphragm has one action: ______. It is innervated by the ______ nerve.

Answer 5

inspiration, phrenic

Question 6

The diaphragm attaches at the _____ process, inner surfaces of the ribs and costal cartilages, the medial and lateral _____ ligaments, and _____ vertebrae, and spans to the ____ tendon (via the crura).

Answer 6

xiphoid, arcuate, lumbar, central

Question 7

The ______ and _____ arteries supply transversus thoracis.

Answer 7

internal thoracic, anterior intercostal

Question 8

transversus abdominis ____ the abdominal cavity (action) and is innervated by the ____ ventral rami and ____ nerve (hint: same as internal oblique)

Answer 8

compresses, L1, lower thoracic

Question 9

The cremasteric a. supplies the _____ muscle and branches off of the ______ artery.

Answer 9

cremaster, inferior epigastric

Question 10

The cremaster muscle ______ the testis and is innervated by the ______ nerve.

Answer 10

elevates, genitofemoral

Question 11

The internal oblique spans the _____ fascia to the _____ ligament, _____ crest, and _____ sheath.

Answer 11

thoracolumbar, inguinal, iliac, rectus

Question 12

The quadratus lumborum muscle attaches at the ____ rib, the ____ ligament, and the iliac ____.

Answer 12

12th, iliolumbar, crest

Question 13

_____ abdominis attaches to the lower six costal cartilages, the _____ fascia, iliac crest, and ___ sheath.

Answer 13

transversus, thoracolumbar, rectus

Question 14

Transversus thoracis has the same action and innervation as the internal intercostals, which is _____ and _____.

Answer 14

depression of ribs, intercostal nerves

Question 15

The diaphragm is supplied by the _____, _____, _____, and _____ arteries.

Answer 15

musculophrenic, inferior phrenic, subcostal, lower posterior intercostal

Question 16

The external oblique attaches from the lower ___ ribs to the iliac ______.

Answer 16

8, crest

Question 17

The rectus abdominis muscle is innervated by the _____ ventral rami and supplied by the superior and inferior _____ arteries.

Answer 17

lower thoracic, epigastric

Question 18

The fibers of the external intercostal are arranged ________.

Answer 18

superior-lateral to inferior-medial (hands in pants orientation)

Question 19

The external oblique is supplied by 7 arteries. Name them all!

Answer 19

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

Question 20

The quadratus lumborum is innervated by ______ (think lumbar plexus) and is supplied by the ______, _____, and ______ arteries. (hint: branches of thoracic aorta, abdominal aorta, and superior gluteal)

Answer 20

ventral rami T12-L3, subcostal, lumbar, ileolumbar

Question 21

The internal intercostals ______ the ribs and are innervated by the ______ nerve.

Answer 21

depress, intercostal

Question 22

Rectus abdominis is responsible for _____ of the trunk and ___ of the abdominal cavity. Unlike the obliques, however, it does not do ____ of the trunk.

Answer 22

flexion, compression, rotation

Question 23

The internal oblique is innervated by ventral rami _____ and the ____ nerve

Answer 23

L1, lower thoracic

Question 24

The internal and external intercostals are supplied by the ____ and ____ arteries

Answer 24

anterior intercostal, posterior intercostal

Question 25

The ____ and ____ are responsible for flexion and rotation of the trunk, as well as compression of the abdominal cavity.

Answer 25

internal oblique, external oblique

Question 26

Rectus abdominis attaches at the ____ process, inferior costal cartilages, and the pubic ____ and \_\_\_\_\_.

Answer 26

xiphoid, crest, tubercle

Question 27

\_\_\_\_\_\_ is responsible for flexing the ____ rib during respiration and extension/lateral flexion of the trunk.

Answer 27

quadratus lumborum, 12th

Question 28

The same 7 arteries supply transversus abdominis and external oblique. Name them all again!

Answer 28

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

Question 29

Transversus thoracis is positioned _____ to the internal and external intercostals?

Answer 29

deep

Question 30

The external intercostals _____ the ribs and are innervated by the ____ nerve.

Answer 30

elevate, intercostal