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

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