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Exam II Muscles
Muscles of the Thorax
12
Anatomy
Graduate
10/24/2011

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Cards

Term
Diaphragm
Definition
Phrenic Nerve (C3,4,5)
Term
Quadratus Lumborum
Definition
O: Iliac Crest
I: 12th Rib, L1-4 Transverse processes
A: Lateral Flexion of Lumbar
N: Ventral rami L1-4
Term
Psoas Major
Definition
O: L1-4 Transverse Processes, Discs, T12
I: Lesser Trochanter
A: Hip Flexor
N: L2-4 Ventral Rami
Term
Psoas Minor
Definition
O: T12 and L1 Bodies
I: Iliopsoas fascia and pectineal line of ilium
A: Lumbar Flexor
N: L1 Ventral Ramus
Term
Iliacus
Definition
O: Iliac Fossa
I: Lesser trochanter of femur
A: Flexor of hip joint
N: Femoral
Term
External Intercostals
Definition
O: Lower border of rib
I: Upper border of rib below
A: Elevate ribs during inspiration
N: Intercostal Nerves
Term
Internal Intercostals
Definition
O: Inner Surface of a rib
I: Upper border of rib below
A: Draw ribs downward during forced expiration
N: Intercostal Nerves
Term
Transversus Thoracis
Definition
O: Inner surface of body and xiphoid process of sternum
I: Costal cartilages of ribs 2-6
A: Draw ribs downward during forced expiration
N: Intercostal Nerves
Term
Rectus Abdominis
Definition
O: Pubic Crest
I: Costal Cartilages 5-7
A: Flexes Vertebral Column, Tense abdominal wall
N: Lower 5-6 Intercostal and Subcostal
Term
External Oblique
Definition
O: Lower 8 ribs
I: Iliac Crests and Linea Alba
A: Compresses abdomen, bilateral flexion, opposite rotation
N: Lower 5 intercostal. iliohypogastric, ilioinguinal
Term
Internal Oblique
Definition
O: Lumbar Fascia, iliac crest, lateral 1/2 of inguinal ligament
I: Cartilage of lower 4 ribs. line alba
A: Same side rotation, bilateral flexion
N Lower 5 intercostal, iliohypogastric, ilioinguinal
Term
Transversus Abdominis
Definition
O: Iliac Crest, lateral 1/3 of inguinal ligament, cartilage of lower 6 ribs
I: Linea alba
A: Compress abdomen
N: Lower 5 intercostal, iliohypogastric, ilioinguinal
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