Netter Atlas of Human Anatomy - Muscles of Chest Wall.PDF

Muscles 4 MUSCLE MUSCLE GROUP ORIGIN INSERTION INNERVATION BLOOD SUPPLY MAIN ACTIONS ATTACHMENT...

Muscles 4 MUSCLE MUSCLE GROUP ORIGIN INSERTION INNERVATION BLOOD SUPPLY MAIN ACTIONS ATTACHMENT ATTACHMENT Diaphragm Diaphragm Xiphoid process, Central tendon Phrenic nerve Pericardiacophrenic, Draws central costal cartilages musculophrenic, tendon down and 7‒12, L1–L3 posterior forward during vertebrae intercostal, and inspiration superior and inferior phrenic arteries External intercostal Thoracic wall Lower borders of Upper borders of Intercostal nerves Posterior intercostal Support intercostal mm. ribs subjacent ribs arteries, supreme spaces in intercostal inspiration and artery, internal expiration, elevate thoracic artery, ribs in inspiration musculophrenic artery Innermost Thoracic wall Lower borders of Upper borders of Intercostal nerves Posterior intercostal Prevent pushing out intercostal mm. ribs subjacent ribs arteries, supreme or drawing in of intercostal intercostal spaces artery, internal in inspiration and thoracic artery, expiration, lower musculophrenic ribs in forced artery expiration Internal intercostal Thoracic wall Costal grooves, Upper borders of Intercostal nerves Posterior intercostal Prevent pushing out mm. lower borders of subjacent ribs arteries, supreme or drawing in of costal cartilages intercostal intercostal spaces artery, internal in inspiration and thoracic artery, expiration, lower musculophrenic ribs in forced artery expiration Levatores costarum Thoracic wall Transverse Subjacent ribs Posterior rami of Posterior intercostal Elevate ribs processes of C7‒ (between tubercle thoracic spinal arteries T11 vertebrae and angle) nerves Pectoralis major m. Pectoral region Clavicular part: Lateral lip of Medial and lateral Pectoral branch of Flexes, adducts, and sternal half of intertubercular pectoral nerves thoracoacromial medially rotates clavicle sulcus of humerus artery, internal arm thoracic artery Sternal part: anterior surface of sternum, cartilages of true ribs Abdominal part: aponeurosis of external abdominal oblique muscle Pectoralis minor m. Pectoral region External surface of Coracoid process of Medial and lateral Pectoral branch of Lowers lateral angle upper margin of scapula pectoral nerves thoracoacromial of scapula and ribs 3–5 artery, superior protracts scapula and lateral thoracic arteries Serratus anterior Shoulder Lateral surfaces of Costal surface of Long thoracic nerve Lateral thoracic Protracts and rotates m. ribs 1‒9 medial border of artery scapula and holds scapula it against thoracic wall Subclavius m. Shoulder Upper border of 1st Inferior surface of Subclavian nerve Clavicular branch of Anchors and rib and costal middle one-third thoracoacromial depresses clavicle cartilage of clavicle artery Subcostal mm. Thoracic wall Internal surfaces of Superior borders of Intercostal nerves Posterior intercostal Depress ribs lower ribs near ribs that are the arteries, their angles 2nd or 3rd below musculophrenic the muscle origin artery Transversus Thoracic wall Internal surfaces of Posterior surface of Intercostal nerves Internal thoracic Depresses ribs and thoracis m. costal cartilages lower sternum artery costal cartilages 2–6 Variations in spinal nerve contributions to the innervation of muscles, their arterial supply, their attachments, and their actions are common themes in human anatomy. Therefore, expect differences between texts and realize that anatomical variation is normal. Muscles Table 4.4