Download Table of Muscles

Muscles
Muscle
External
intercostal
Origin
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fibers run
down ward
and forward
Internal
Intercostal
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fibers run
upward and
forward
Innermost
intercostals
Fibers run
anteriorly,
posteriorly
and laterally
XXXX
Posterior
surface of
lower
sternum
Transversus
Thoracis
Muscle
External
abdominal
oblique
Origin
Slips from ribs
V-XII
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(fibers run the
same way as
“hands in your
pocket”)
Insertion
End
anteriorly as
external
intercostal
membrane
End
posteriorly
as posterior
intercostal
membranes
Innervation
Intercostal
n.
Action
ELEVATE
ribs during
inspiration
other
Intercostal
n.
Deep
EXPIRATION
Neurovascular
bundle is
posterior
Intercostal
n.
inner
surfaces of
costal
cartilages 26
Insertion
Iliac crest
and
Linea alba
through its
aponeurosis
Intercostal
n,
Neurovascular
bundle is
anterior
DEPRESSES
Ribs
Innervation
Anterior
rami of
lower 6
thoracic
spinal n. T7T12
Action
Compress
abdominal
wall during
maximal
expiration,
coughing,
and
defecation.
Trunk
rotation and
flexion
Other
Lower part
of
aponeurosis
forms
inguinal
ligament
b/w ASIS
and pubic
tubercle.
Aponeurosis
forms part of
lateral
anterior wall
of inguinal
canal, forms
medial
anterior wall
and
superficial
inguinal ring.
Fascia forms
Internal
abdominal
oblique
Thoracolumbar
fascia, iliac
crest, lateral
2/3 of inguinal
ligament
<<< >>>>
(fibers sort of
run like that)
Inferior
boarder of
ribs IX-XII
Through
aponeurosis:
linea alba,
pubic crest,
and
pectineal
line
Anterior
rami of
lower 6
thoracic
spinal nn.
T7-T12 plus
L1
external
spermatic
fascia
Compress
Its
abdominal
aponeurosis
wall during fuses w/ that
maximal
of the
expiration,
transversus
coughing,
abdominis to
and
form the
defecation.
conjoined
Trunk
tendon
rotation and Fibers that
flexion
arch over the
spermatic
cord form
the
cremasteric
m. which is
innervated
by the
genital
branch of the
genital
femoral
nerve and it
raises the
testicle for
temp
regulation
Cremasteric
reflex:
stroke upper
medial thigh,
testicular
movement
confirms
integrity of
L1-L2 spinal
cord
segments.
Forms
middle
spermatic
fascia. Forms
Transversus
Abdominis
Thoracolumbar
fascia, iliac
crest, costal
cartilages of
lower few ribs
Fibers run
straight across
body
horizontally
Its
aponeurosis
attaches to
the linea
alba, the
pubic
tubercle, and
the pectineal
line
Anterior
rami of
lower 6
thoracic
spinal nn.
T7-T12 plus
L1
Compress
abdominal
wall during
maximal
expiration,
coughing,
and
defecation.
Rectus
Abdominis
Pubic crest,
pubic tubercle
and pubic
symphysis
Fibers run
vertically up
towards ribs
Costal
cartilages of
ribs V-VII
And xyphoid
process
Anterior
rami of
lower 6
thoracic
spinal n. T7T12
Compress
abdominal
wall during
maximal
expiration,
coughing,
and
defecation.
Trunk
flexion
part of
lateral
anterior wall
and part of
medial
posterior
wall of
inguinal
ligament
Its
aponeurosis
fuses w/ that
of the
internal
abdominal
oblique to
form the
conjoined
tendon.
Aponeurosis
forms
remainder of
posterior
medial wall
of inguinal
canal.
“6 pack”
the rectus
sheath that
encloses the
rectus
abdominal
m.
Above the
umbilicus
the
aponeuroses
of the
external and
internal
obliques
contribute to
the anterior
sheath while
the
aponeuroses
of the
internal
oblique and
the
transversus
abdominus
contribute to
the posterior
sheath.
Below the
umbilicus
the
aponeuroses
of the
external and
internal
oblique’s and
the
transversus
abdominus
all
contribute to
the anterior
sheath. At
this point
(the arcuate
line) the
posterior
sheath is
absent and
the rectus
abdominis in
contact w/
transversalis
fascia. Has
tendinous
intersections
Muscle
Origin
Psoas Major Bodies of T12L5, from
Insertion
Lesser
trochanter
Innervation
Lumbar
plexus
Action
Relationships
Flexes thigh Tendon
with iliacus, posterior to
transverse
processes and
intervertebral
disks of L1-L5
(ventral rami
L1-L3)
Psoas Minor Sides of T12
and L1
vertebrae and
intervening
vertebral disk
Iliopubic
eminence
on pelvic
rim
Iliacus
Lesser
Femoral
trochanter, nerve L2-L4
fibers
mixed with
psoas major
(iliopsoas)
Superior 2/3
of iliac fossa
Ventral
ramus L1
both with
iliacus
flexus
trunk,
flexes
vertebral
column
laterally
alone
Helps psoas
major flex
pelvis and
lumbar
region of
the
vertebral
column
Flexes thigh
and
stabilizes
hip joint
with psoas
major
inguinal
ligament and
anterior to the
hip joint .
Lateral to the
lumbar
vertebrae.
“muscle of the
loin”
Anterior to
psoas major
Lateral and
inferior to
psoas major,
extends across
sacroiliac joint
Clinical:
iliopsoas m.
has extensive
relations to the
kidneys,
ureters, cecum,
sigmoid colon,
pancreas,
lymph nodes,
and lumbar
plexus.
Tuberculosis in
lumbar region
spreads from
the verterbrae
to fascia
enclosing the
psoas major
and can cause
an abscess. Pus
from this
abscess can
pass deep to
Quadratus
Lumborum
Tips of
transverse
processes of
L1-L5
Iliolumbar
Ventral
ligament
branches
and internal T12, L1-L4
lip of iliac
crest
Extends
and
laterally
flexes
vertebral
column and
fixes 12th
rib during
inspiration
inguinal
ligament into
femoral
triangle
Overlapped
medially by
psoas major,
borders
transversus
abdominis