pectoalis major & minor, serratus anterior, subclavius, levatore scapulae, rhomboideus minor &...

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  • Pectoalis major & minor, serratus anterior, subclavius, levatore scapulae, rhomboideus minor & major, and trapezius

  • Muscles of Upper Arm and ShoulderPectoralis major and minor:Major: large fan-likeOriginates sternum and clavicleInserts in humerous (shoulder)Elevates sternumMinor:Originates ribs 2-5Insert in caracoid process of scapulaDeep to pectoralis major

  • Muscles of Upper Arm and ShoulderSerratus anterior:Originate ribs 1-9Insert in scapulaSubclavius:Originates clavicleInsert in first ribLevator scapulae:Originate C1-C4Insert in scapula

  • Muscles of Upper Arm and ShoulderRhomboideus major and minorMajor:Originate T2-T5Insert in scapulaMinor:Originate C7 and T1Insert in scapulaProvide stability for shoulder girdle

  • Muscles of Upper Arm and ShoulderTrapezius:Originate from C2-T12Insert into scapula and clavicleGenerally, accessory muscles support and protect thoracic cavity.

  • ReviewInspiration muscles:Primary: DiaphragmAccessory:Muscles of thorax: anterior and posteriorMuscles of neckMuscles of upper arm and shoulder

  • Muscles of Thorax, Back, and Upper LimbsAbdominal Muscles

  • Anterior and Posterior

  • AnteriorInternal intercostals:Origination ribs 2-12Insert ribs 1-11Deep to external intercostalsInnermost intercostals:Same origination and insertion as internal intercostals.Deepest intercostalsNot found in chondral portion

  • AnteriorTransversus thoracis:Originates on sternumInserts in ribs 2-6

  • Subcostals and Serratus posterior inferior

  • PosteriorSubcostals:Run parallel to internal intercostalsMay span more than one ribSerratus posterior inferior:Originates on T11-L3Inserts in ribs 7-12

  • Anterolateral and Posterior Muscles

  • AnterolateralTransversus abdominis:Deepest of the anterior abdominal musclesOriginates from vertebral columnInserts in aponeurosis, ribs 6-12, and pubisInternal oblique abdominis:Originates from pelvic girdleInserts in lower ribs and aponeurosis

  • AnterolateralExternal oblique abdominis:Most superficial and largestOriginate ribs 5-12Insert in pelvic girdle and etc.Rectus abdominis:Originate pubis Insert sternum and ribssix pack

  • PosteriorQuadratus lumborum:Originate from pelvic girdleInsert in lumbar vertebrae

  • Latissimus dorsi

  • Upper LimbLatissimus dorsi:Originates from lower vertebraeInsert into humerousRole in expiration only suspected

  • ReviewInspirationDiaphragm and accessoryExpirationThoracic and abdominal

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