{"id":1559,"date":"2018-09-17T22:49:17","date_gmt":"2018-09-17T22:49:17","guid":{"rendered":"https:\/\/integrativewellnessandmovement.com\/iwmanatphys\/?p=1559"},"modified":"2020-01-01T12:19:48","modified_gmt":"2020-01-01T20:19:48","slug":"muscles-pectoralismajor","status":"publish","type":"post","link":"https:\/\/integrativewellnessandmovement.com\/iwmanatphys\/anatomyphysiologymuscles\/muscles-pectoralismajor\/","title":{"rendered":"Muscles: Pectoralis Major."},"content":{"rendered":"<p><a href=\"http:\/\/www.integrativewellnessandmovement.com\/iwmstudentresources\/iwmmuscles\/IWM-APMuscles-pectoralismajor.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Download these notes.<\/a><\/p>\n<p>Anatomy &amp; Physiology: Muscles\u2014Pectoralis Major.<\/p>\n<p>Structure.<\/p>\n<ul>\n<li>Origin: anterior surface of clavicular head; anterior surface of sternum, costal cartilage of ribs 2-6 or sometimes 1-7.<\/li>\n<li>Insertion: greater tubercle and lateral lip of the intertubercular sulcus of of humerus.<\/li>\n<\/ul>\n<p>Function.<\/p>\n<ul>\n<li>Concentric action: shoulder flexion (clavicular fibers), horizontal adduction, and internal\/medial rotation, protraction.<\/li>\n<li>Reverse mover action: lateral deviation of trunk; trunk flexion at spinal joints; anterior translation of the trunk; scapular downward rotation; ipsilateral rotation of trunk; trunk elevation.<\/li>\n<li>Eccentric action: shoulder extension, horizontal abduction, and external rotation, retraction. Controls\/restrains\/slows arm abduction, lateral rotation, extension, horizontal extension, flexion, and adduction. Controls\/restrains\/slows scapular retraction, protraction, elevation, and upward rotation. Controls\/restrains\/slows contralateral rotation, contralateral lateral deviation, posterior translation and depression of trunk.<\/li>\n<li>Isometric action: stabilization of the shoulder girdle, clavicle, and scapula.<\/li>\n<li>Innervation: medial and lateral pectoral nerves.<\/li>\n<li>Arterial supply: pectoral branches of thoracoacromial trunk; posterior intercostal arteries (branches of aorta) and lateral thoracic artery (branch of axillary artery).<\/li>\n<\/ul>\n<p>Clinical Significance.<\/p>\n<p>More.<\/p>\n<ul>\n<li><a href=\"https:\/\/www.anatomynext.com\/muscles-pectoralis-major-muscle\/\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/www.anatomynext.com\/muscles-pectoralis-major-muscle\/<\/a><\/li>\n<li><a href=\"https:\/\/www.youtube.com\/watch?v=as9Ked5qhXw\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/www.youtube.com\/watch?v=as9Ked5qhXw<\/a><\/li>\n<li><a href=\"https:\/\/www.youtube.com\/watch?v=hfrUcSWD3Z8\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/www.youtube.com\/watch?v=hfrUcSWD3Z8<\/a><\/li>\n<\/ul>\n\n\n<div class=\"rl-gallery-container rl-loading\" id=\"rl-gallery-container-1\" data-gallery_id=\"5665\"> <div class=\"rl-gallery-description\">Pectoralis major. Used with permission by 3D4Medical.<\/div> <div class=\"rl-gallery rl-basicgrid-gallery \" id=\"rl-gallery-1\" data-gallery_no=\"1\"> <div class=\"rl-gallery-item\"><a href=\"https:\/\/integrativewellnessandmovement.com\/iwmanatphys\/wp-content\/uploads\/2019\/12\/pectoralismajorED2.jpg\" title=\"\" data-rl_title=\"\" class=\"rl-gallery-link\" data-rl_caption=\"\" data-rel=\"lightbox-gallery-1\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/integrativewellnessandmovement.com\/iwmanatphys\/wp-content\/uploads\/2019\/12\/pectoralismajorED2-300x225.jpg\" width=\"300\" height=\"225\" alt=\"\" \/><\/a><\/div><div class=\"rl-gallery-item\"><a href=\"https:\/\/integrativewellnessandmovement.com\/iwmanatphys\/wp-content\/uploads\/2019\/12\/pectoralismajorED1.jpg\" title=\"\" data-rl_title=\"\" class=\"rl-gallery-link\" data-rl_caption=\"\" data-rel=\"lightbox-gallery-1\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/integrativewellnessandmovement.com\/iwmanatphys\/wp-content\/uploads\/2019\/12\/pectoralismajorED1-300x225.jpg\" width=\"300\" height=\"225\" alt=\"\" \/><\/a><\/div><div class=\"rl-gallery-item\"><a href=\"https:\/\/integrativewellnessandmovement.com\/iwmanatphys\/wp-content\/uploads\/2019\/12\/pectoralismajorED4.jpg\" title=\"\" data-rl_title=\"\" class=\"rl-gallery-link\" data-rl_caption=\"\" data-rel=\"lightbox-gallery-1\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/integrativewellnessandmovement.com\/iwmanatphys\/wp-content\/uploads\/2019\/12\/pectoralismajorED4-300x225.jpg\" width=\"300\" height=\"225\" alt=\"\" \/><\/a><\/div><div class=\"rl-gallery-item\"><a href=\"https:\/\/integrativewellnessandmovement.com\/iwmanatphys\/wp-content\/uploads\/2019\/12\/pectoralismajorED3.jpg\" title=\"\" data-rl_title=\"\" class=\"rl-gallery-link\" data-rl_caption=\"\" data-rel=\"lightbox-gallery-1\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/integrativewellnessandmovement.com\/iwmanatphys\/wp-content\/uploads\/2019\/12\/pectoralismajorED3-300x225.jpg\" width=\"300\" height=\"225\" alt=\"\" \/><\/a><\/div> <\/div> <\/div>\n\n\n\n<p>References<\/p>\n\n\n\n<p>Biel,&nbsp;A. (2015).&nbsp;<em>Trail guide to the body: A hands-on guide to locating muscles, bones and more<\/em>.<\/p>\n\n\n\n<p>Cedars-Sinai. (2018). Vertebrae of the spine. Retrieved from https:\/\/www.cedars-sinai.org\/health-library\/diseases-and-conditions\/v\/vertebrae-of-the-spine.html<\/p>\n\n\n\n<p>Clark,&nbsp;M., Lucett,&nbsp;S., Sutton,&nbsp;B.&nbsp;G., &amp; National Academy of Sports Medicine. (2014).&nbsp;<em>NASM essentials of corrective exercise training<\/em>. Burlington, MA: Jones &amp; Bartlett Learning.<\/p>\n\n\n\n<p>Jenkins,&nbsp;G., &amp; Tortora,&nbsp;G.&nbsp;J. (2012).&nbsp;<em>Anatomy and Physiology: From Science to Life, 3rd Edition International Stu<\/em>. John Wiley &amp; Sons.<\/p>\n\n\n\n<p>Muscolino,&nbsp;J.&nbsp;E. (2017).&nbsp;<em>The muscular system manual: The skeletal muscles of the human body<\/em>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Download these notes. Anatomy &amp; Physiology: Muscles\u2014Pectoralis Major. Structure. Origin: anterior surface of clavicular head; anterior surface of sternum, costal cartilage of ribs 2-6 or sometimes 1-7. Insertion: greater tubercle and lateral lip of the intertubercular sulcus of of humerus. Function. Concentric action: shoulder flexion (clavicular fibers), horizontal adduction, and internal\/medial rotation, protraction. Reverse mover [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[34],"tags":[],"class_list":["post-1559","post","type-post","status-publish","format-standard","hentry","category-anatomyphysiologymuscles"],"_links":{"self":[{"href":"https:\/\/integrativewellnessandmovement.com\/iwmanatphys\/wp-json\/wp\/v2\/posts\/1559","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/integrativewellnessandmovement.com\/iwmanatphys\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/integrativewellnessandmovement.com\/iwmanatphys\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/integrativewellnessandmovement.com\/iwmanatphys\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/integrativewellnessandmovement.com\/iwmanatphys\/wp-json\/wp\/v2\/comments?post=1559"}],"version-history":[{"count":5,"href":"https:\/\/integrativewellnessandmovement.com\/iwmanatphys\/wp-json\/wp\/v2\/posts\/1559\/revisions"}],"predecessor-version":[{"id":5952,"href":"https:\/\/integrativewellnessandmovement.com\/iwmanatphys\/wp-json\/wp\/v2\/posts\/1559\/revisions\/5952"}],"wp:attachment":[{"href":"https:\/\/integrativewellnessandmovement.com\/iwmanatphys\/wp-json\/wp\/v2\/media?parent=1559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/integrativewellnessandmovement.com\/iwmanatphys\/wp-json\/wp\/v2\/categories?post=1559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/integrativewellnessandmovement.com\/iwmanatphys\/wp-json\/wp\/v2\/tags?post=1559"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}