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Anatomy Upper limb d0fc2542

Which of the following aeries supply pectoralis major muscle?

A
Pectoral branches of thoracoacromial aery
B
Intercotal aery
C
Lateral thoracic aery
D
Subclan aery
High-Yield Explanation
PECTORALIS MAJOR:-Origin: Small clavicular head- medial half of anterior aspect of clavicle.Sternocostal head- lateral half of sternum upto 6th cailage., and medial pas of 2nd to 6th costal cailages.Inseion:-U shaped inseion into lateral lip of bicipital groove.Nerve supply:-Lateral pectoral( C5-C7)Medial pectoral (C6-C8, T1)Action:-Clavicular head- flexes arm Sternocostal head-adducts and medially rotates armOnly muscle of upper limb which is supplied by all 5 spinal segments that form brachial plexus.Blood supply:- pectoral branch of thoracoacromial aery {Reference: Vishram Singh, pg no.40}

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