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Muscle Origins, Insertions,etc
Flashcard set of muscles from the chest, abdominal, and trunk. Complete with origins, insertions, actions, and innervations.
12
Biology
Undergraduate 4
03/04/2009

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Term
pectoralis major
Definition
clavicle, sternum, ribs 2-6
intertubercular groove-humerus
horizontal adduction, rotation, shoulder adduction
medial and lateral pectoral nerve
Term
pectoralis minor
Definition
anterior side of ribs 2-5
coracoid process-scapula
scapular depression, protraction, downward rotation
medial pectoral nerve
Term
external intercostals
Definition
inferior side of rib above
superior side of rib below
elevates ribs
T2-T12
Term
internal intercostals
Definition
superior border of rib below
inferior border of rib above
depresses ribs
T2-T12
Term
diaphragm
Definition
xiphoid process, cartilage of inferior 6 ribs, lumbar vertebra
central tendon
inspiration
phrenic
Term
rectus abdominis
Definition
pubic crest and symphysis
cartilage of 5-7 ribs, xiphoid process
trunk flexion, abdominal compression
T7-T12
Term
external obliques
Definition
inferior 8 ribs
iliac crest and linea alba
trunk flexion, abdominal compression
T7-T12
*one side-lateral trunk flexion
Term
internal obliques
Definition
iliac crest and ingunial ligament
cartilage of last 3-4 ribs, linea alba
trunk flexion, abdominal compression
T8-T12
*one side-lateral trunk flexion
Term
transverse abdominis
Definition
iliac crest, ingunial ligament, cartilage of last 6 ribs
linea alba, xiphoid process
abdominal compression
T8-T12
Term
iliacus
Definition
iliac fossa and sacrum
lesser trochanter of femur
hip flexion, lateral rotation, trunk flexion
L2-L3
Term
psoas major
Definition
transverse process and bodies of lumbar
lesser trochanter of femur
hip flexion, trunk flexion, lateral rotation
femoral nerve
Term
quadratus lumborum
Definition
iliac crest
inferior border of 12th rib, L1-L4
trunk extension (role in in/exhalation
T12 & L1-L4
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