Muscles of the anterior body wall

Question 1

3 parts of the skeletal part of the thorax

Answer 1

Thoracic vertebrae
Sternum
Ribs

Question 2

3 superficial muscles of the wall associated with upper limb and shoulder girdle

Answer 2

Pectoralis major
Pectoralis minor
Serratus anterior

Question 3

Pectoralis major connections

Answer 3

Connects sternum and clavicle to humerus

Question 4

Pectoralis minor connections

Answer 4

Attaches to the coracoid process and ribs

Moves ribs during inspiration but not hugely important

Question 5

Serratus anterior

Answer 5

Connects scapula to ribs 2-9

Lateral aspect of the thoracic wall

Question 6

3 intercostal muscles and their orientation

Answer 6

External (fingers in pockets)
Internal (perpendicular)
Innermost (perpendicular)

Question 7

External oblique

origin, insertion, action, direction

Answer 7

Origin: ribs 5-12
Insertion: iliac crest, ASIS (via inguinal ligament), linea alba (via aponeurosis)
Action: flexion, lateral flexion and rotation or spine, compression of abdominal contents
Fingers in pockets direction

Question 8

Linea alba

Answer 8

Line where the aponeurosis of the external obliques meet

Question 9

Inguinal ligament

Answer 9

Thickening of the inferior fibers of the external oblique muscle and its aponeurosis
Runs between ASIS and pubic bone

Question 10

Internal oblique

origin, insertion, action, direction

Answer 10

Origin: inguinal ligament, iliac crest
Insertion: cartilage of ribs 8-10, linea alba
Action: flexion, lateral flexion and rotation or spine, compression of abdominal contents
Perpendicular to fibers of the external oblique

Question 11

Transversus abdominis
(origin, insertion, action, direction)

Answer 11

Origin: iliac crest, inguinal ligament, cartilage of ribs 6-12
Insertion: linea alba
Action: compresses abdominal contents
Runs horizontally

Question 12

Rectus abdominis
(origin, insertion, action, direction)

Answer 12

Origin: pubic bone
Insertion: cartilage of ribs 5-7, xiphoid process
Action: flexes vertebral column, compresses abdominal contents
Runs vertically

Question 13

Rectus sheath

Answer 13

Formed by aponeuroses of the external and internal oblique, and the transversus abdominis muscles
External and one of the internal go above, transversus and other internal go below

Question 14

Transversalis fascia

Answer 14

Layer of fascia that separates the muscles from the parietal peritoneum

Question 15

Inguinal canal

Answer 15

Canal in the anterior abdominal wall
Testes descend through it in males
Anterior wall formed by external oblique muscle and aponeurosis
Floor from medial part of inguinal ligament
Posterior wall from fascia transversalis
Roof from arching fibers of internal oblique and transversus abdominis
Openings are superficial and deep inguinal rings

Question 16

Indirect inguinal hernias

Answer 16

20X more common in males than females

Pass through the deep ring, inguinal canal, and superficial inguinal ring

Question 17

Direct inguinal hernias

Answer 17

Push through the weakened abdominal wall and exit through the superficial inguinal ring

Question 18

Linea semilunaris

Answer 18

Lateral border of the rectus abdominis

Can see it on people with well defined abs