pectoralis major muscle
The pectoralis major is a paired, superficial muscle located on the anterior surface of the thoracic cage. If you’re a gym lover, you’ll hear these muscles also being referred to as the pecs muscles. The pectoralis major has a broad origin, based on which it is divided into three parts: clavicular part, sternocostal part and abdominal part. All three parts converge laterally and insert onto the greater tubercle of humerus.
The pectoralis major muscle is a fan-shaped muscle that consists of three parts that originate from three different sites:
The clavicular part originates from the anterior surface of the medial half of the clavicle.
The sternocostal part originates from the anterior surface of sternum and the anterior aspects of the costal cartilages of ribs 1-6.
The smallest, abdominal part originates from the anterior layer of the rectus sheath.
The muscle fibers from all three parts run laterally, converging towards the proximal humerus. They give off a broad tendon that inserts along the crest of the greater tubercle of the humerus.
The pectoralis major muscle is innervated by the lateral and medial pectoral nerves (root value C5-T1), which stem from the brachial plexus.
-
1:11:28
The Squad
10 hours agoArsenal's Huge Summer🚨Olise to Man Utd DEAL✅ Osimhen to Arsenal or Chelsea☑️ UCL Final Preview
31.7K6 -
56:23
Trumpet Daily
1 day ago $1.10 earnedCohen Is Free to Lie and Steal, but Trump Is Guilty of Something - Trumpet Daily | May 31, 2024
23.8K43 -
8:26
MichaelBisping
22 hours agoBISPING CHOKES OUT STEVE-O! | JACKASS STAR PUT TO SLEEP BY UFC CHAMP! *FULL VIDEO*
45.8K12 -
20:00
Clownfish TV
21 hours agoGoogle Hurt ITSELF in Its Confusion!
54.2K54 -
24:20
Brewzle
1 day agoWe Went Unicorn Bourbon Hunting In Louisville, KY
55.7K8 -
35:39
Degenerate Jay
1 day agoGoldenEye 007 Saved James Bond - Movie Review
52.7K6 -
14:54
Mr Reagan
1 day ago $0.46 earnedWE ARE ALL MAGA NOW
44K108 -
15:35
Space Ice
1 day ago'The Beekeeper' Exposes The Dark, Gritty, & Violent World Of Apiculture - Best Movie Ever
46.8K22 -
3:29:53
SonnyFaz
1 day agoEric Kelly Trains Sonny FULL STREAM
46.7K12 -
9:32
China Uncensored
18 hours agoBad Things Are Happening In Taiwan...
48.4K32