Quiz 6 - Lower Axial Muscles Flashcards Preview

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Flashcards in Quiz 6 - Lower Axial Muscles Deck (16):
1

oblique and rectus muscles

scalenes

2

scalenes

elevate ribs and/or flex neck (together), laterally flex neck and rotates neck
- O: cervical vertebrae
- I: sup. surface of 1st and 2nd rib
(anterior, middle, posterior)

3

external intercostals

elevates ribs (during inhalation)
- O: inf. border of ribs
- I: sup. border of inf. ribs

4

internal intercostals

depresses ribs (during exhalation)
- O: sup. border of ribs
- I: inf. border of sup. ribs

5

external oblique

compresses abdomen, depresses ribs, flexes laterally or rotates vertebrae to opposite side
- O: ribs
- I: aponeuroses extending to linea alba

6

internal oblique

same as external oblique and rotates vertebrae to same side
- O: iliac crest and thoracolumbar fascia
- I: ribs, linea alba, pubis

7

transverse abdominis

compresses abdomen
- O: rib cartilages, iliac crest, thoracolumbar fascia
- I: linea alba pubis

8

rectus abdominis

depresses ribs, flexes vertebrae, compresses abdomen
- O: pubis
- I: rib cartilages and xiphoid process

9

diaphragm

contraction expands thoracic cavity
- O: xiphoid process, ribs, lumbar vertebrae
- I: central tendon sheet

10

urogenital diaphragm

- supports the organs of the pelvic cavity
- flex the joints of the sacrum and coccyx
- control the movement of material through the urethra and anus

11

external urethral sphincter

- male - closes urethra, compresses prostate and bulb-urethral glands
- female - closes urethra, compresses vagina

12

deep transverse perineal

- male - strengthens pelvic floor
- female - strengthens pelvic floor

13

pelvic diaphragm

- levator ani
- external anal sphincter
- coccygeus

14

levator ani

- pubococcygeus - tenses pelvic floor, supports pelvic organs, elevates and retracts anus
- illiococcygeus - same as above

15

external anal sphincter

closes anal opening

16

coccygeus

elevates and supports pelvic floor