Muscles of the trunk

Question 1

rectus abdominals attachments

Answer 1

xiphoid process/ costal cart of ribs 5-7

pubic crest -/ symphysis

Question 2

rectus abdominals bilateral actions

Answer 2

flexion of the trunk
increase intraabdominal pressure

Question 3

rectus abdominals unilateral actions

Answer 3

lateral flexion of the trunk

Question 4

linea alba

Answer 4

when the rectus sheath fuse

• external/internal obliques/ transverse abs
  form an apponeurosis that encases the abdominals

costal margins to midpoint between umbilical/ pubis symphysis
2 layers anterior. posterior to rectus abdominals

Question 5

external oblique attachments

Answer 5

outerboarder lower ribs 8// costal cart
iliac crest/ linea alba
folds over to from inguinal ligament

Question 6

external oblique bilateral actions

Answer 6

flexion of the trunk
increase intrabdominal pressure

Question 7

external oblique unilateral actions

Answer 7

lateral flexion
contralateral trunk rotation of trunk

Question 8

internal oblique attachments

Answer 8

lower boarder of lower 4 ribs/ cart

iliac crest/ thoracolumbar fascia/ ingunal ligament
linea alba

Question 9

internal oblique bilateral actions

Answer 9

flex trunk

increase inrabdominal pressure

Question 10

internal oblique actions unilateral

Answer 10

lat flexion

ipsilateral rotation of trunk

Question 11

transverse abdominals attachment

Answer 11

inner surface of costal cart lower 6 ribs

iliac crest/ thoracolumbar fascia/ imguinal ligament
linea alba

Question 12

transverse abdominal bilateral actions

Answer 12

increase intrabdominal pressure

Question 13

transverse abdominal unilateral actions

Answer 13

ipsilateral rotation of trunk

Question 14

pyramidalis attachments

Answer 14

pubic crest
linea alba
in rectus sheath

tesne the linea alba

Question 15

quadratus lumborum attachments

Answer 15

rb 12 lower boarder/ trasnver process on lumbar vert

iliac crest/ illoumubar ligament

Question 16

quadratus lumborum bilateral actions

Answer 16

extensor lumbar trunk

fix 12th rib in inspiration

Question 17

quadratus lumborum unilateral actions

Answer 17

lateral flexion flexion of lumbar trunk

Question 18

psoas major attachments

Answer 18

bodies/ transverse process of lumbar vert

lesser trochanter femur

hip flexion

bilateral- flexion of trunk

unilateral- lateral flexion of trunk

Question 19

psoas minor

Answer 19

boaide sof t12/ L1
IVD
weak trunk flexor

Question 20

erector spinae SPINALIS

Answer 20

thoracics- superior attach to upper lumbar up to upper thoracic
most developed

cervics- cervical vert/ upper thoracic

capitis- head semmispinals capitis

bilat- extends, trunk, neck, head

unilateral- lat flex but not strong

Question 21

erector spinae LONGISSIMUS

Answer 21

TRANSVERSE PROCESS

thoracic- thoracic vert/ adjacent ribs= most developed

cervcics- upper crevical

capitis- skull/ mastoid process

billateral- extension
unilateral- lateral flexion

Question 22

Erector spinae ILLIOCOSTALIS

Answer 22

angles of ribs

luborum- common origin/ angles of lower ribs

thoracics- lower to upper ribs

cervical= transvers of lower cercial vert

extends trunk and neck

lateral flexion of neck and trunk

Question 23

transversospinalis

Answer 23

TP inferiorly to SP superiorly

semispinalis- span many vert sgements
thoracics/ cervicics/ capitis
extension/ contrlateral rotation

mutifidus- shorter
whole vert column. most developed in lumbar
extension of the trunk -/ neck
contralteral rotation/ lateral flexion
stabillity

rotatores-
shorter 1-2 segments
most developed in thoracic region
contralateral rotation
stability

Question 24

interspinalis

Answer 24

b/w adjacent spinous process
assist extension of trunk
stability

Question 25

intertransverse

Answer 25

adjacent tp
cervical- anterior and posterior

lumbar- medial and lateral

assist lateral flexion/ stability