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Thorax Muscles [9.2.2011]
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Pectoralis Minor Muscle Innervation
Medial Pectoral Nerves
Pectoralis Minor Muscle Origin
3-5 ribs near their intercostal muscles
Pectoralis Minor Muscle Insertion
coracoid process of the scapula
(medial border and superior surface of)
Pectoralis Minor Muscle Action
Draw scapula inferior and anterior (stabilize scapula)
Pectoralis Minor Muscle Blood Suppy
-pectoral branch of thoracoacromial artery
- medial pectoral vein
Serratus Anterior Muscle Origin
1st - 8th ribs (laterally)
Serratus Anterior Muscle Insertion
medial border of the scapula (anterior surface of)
Serratus Anterior Muscle Innervation
Long Thoracic Nerve
Serratus Anterior Muscle Action
rotate scapula, protect scapula by holding it against the thoracic wall
Serratus Anterior Muscle Blood Supply
Lateral Thoracic Artery and Vein
Subclavius Muscle Origin
junction btwn 1st rib and it's costal cartilage
Subclavius Muscle Insertion
Inferior Surface of Middle 3rd of clavicle
Subclavius Muscle Innervation
subclavian nerve
Subclavius Muscle Blood Supply
clavicular branch of the thoracoacromial artery
subclavian artery and subclavian vein
Subclavius Muscle Action
Anchor and depress the Clavicle
External Intercostal Muscle Origin
inferior border of the rib
External Intercostal Muscle Insertion
superior border of the rib below
External Intercostal Muscle Innervation
Intercostal Nerves
External Intercostal Muscle Action
elevate ribs
External Intercostal Muscle Blood Supply
Anterior and Posterior incostal arteries and veins
Internal Intercostal Muscle Action
Interosseous Part (depresses ribs)
Interchondral part (elevates ribs)
Innermost Intercostal Muscle Action
Aids Respiration
Diaphragm Muscle Origin
L1 - L3 Vertebrae
xiphoid process
lower 6 costal cartilages
Diaphragm Muscle Insertion
Central Tendon (an aponeurosis)
Diaphragm Muscle Innervation
Phrenic Nerves
Diaphragm Muscle Blood Supply
Phrenic Artery
Phrenic Vein
Diaphragm Muscle Action
Most important muscle in respiration
helps abdomen with lifting and strain
Transversus Thoracus Muscle Origin
posterior lower portion of sternum
Transverse Thoracus Muscle Insertion
Internal Surface of Costal cartilages 2-6
Transversus Thoracus Muscle Innervation
Intercostal Nerves
Transversus Thoracus Muscle Action
Weakly depress ribs
Transversus Thoracus Muscle Blood Supply
Internal Thoracic Artery
Internal Thoracic Vein
Author
Anonymous
ID
100696
Card Set
Thorax Muscles [9.2.2011]
Description
thorax muscles
Updated
2011-09-09T14:29:08Z
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