Abdominal Muscles Flashcards Preview

GI > Abdominal Muscles > Flashcards

Flashcards in Abdominal Muscles Deck (23)
1

What are the two main groups of muscles in the abdominal wall?

Flat muscles

Vertical muscles

2

Name the flat muscles

External oblique

Internal oblique

Transversus abdominis

3

In which direction do the fibres of the external oblique run?

Inferomedially

4

Origin and attachments of the external obliques?

Origins: ribs 5-12

Attachments: linea alba, pubic tubercle, anterior half of iliac crest

5

Innervation of the external oblique?

Thoracoabdominal nerve (T7-11)

Subcostal

6

Action of the external oblique?

Compresses and supports viscera

Flexes and rotates trunk

7

In which direction do the fibres of the internal oblique run?

Superiormedially

8

Innervation of the internal oblique?

Thoracoabdominal nerves (T6-T12)

First lumbar nerves

9

Action of the internal obliques?

Same as external

Compress and support viscera

Flex and rotate trunk

10

In which direction do the fibres of transversus abdominis run?

Transversely

11

Innervation of the transversus abdominis?

Same as internal oblique

Thoracoabdominal nerves T6-T12

First lumbar nerves

12

Name the vertical muscles

Rectus abdominis

Pyramidalis

13

Attachments of the rectus abdominis?

Origin: pubic symphysis and pubic crest

Attachments: xiphoid process and costal cartilages 5-7

14

Innervation of the rectus abdominis?

Thoracoabdominal nerves (anterior rami of T6-T12)

15

Action of the rectus abdominis?

Flexes trunk

Compresses abdominal viscera

Stabilised and controls tilt of pelvis

16

Where is the pyramidalis found?

Superficially to the rectus abdominis

17

Attachments of the pyramidalis?

Anterior surface of the pubis and anterior pubic ligament

Ends in linea alba

18

Action of the pyramidalis?

Tenses linea alba

(Not present in 20% of population)

19

Name this muscle

 

 

External oblique

20

Name this muscle

Rectus abdominis

21

Name this muscle

Intenal oblique

22

Name this muscle

Pyramidalis

23

Name this muscle

Transversus abdominis