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Muscle origins and insertions

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nicolek's version from 2016-10-12 21:11

Section

Muscle origins and insertions

 

MuscleOriginInsertionPrimary Concentric Actions
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Question Answer Column 3 Column 4
Pectoralis majorMedial Clavicle and SternumUpper HumerusFlexion, horizontal flexion, adduction and internal rotation of the shoulder joint
Pectoralis minorAnterior surface of the 3rd - 5th RibCoracoid process of the scapulaDepression and protraction of the scapula
Erector SpinaeSacrum, Ilium, ribs and vertebraeRibs, Vertebrae and base of the scullExtension and Lateral Flexion of the spine
Illiocostalis ( 3 Erector Spinae Muscles)Sacrum, ilium , ribs and posterior surfaces of ribs 1-12Posterior surface of ribs 1-12 and transverse process of the cervical vertebraeLateral flexion and extension of the spine
Longissumus ( 3 erector spinae muscles)Transverse Process of the lumbar and thoracic vertebraeRibs and transverse process of the thoracic and cervical vertebrae and mastoid processLateral flexion and extension of the spine
Spinalis ( erector spinae muscles)Spineous process of the upper lumbar and thoracic vertebraelateral flexion and extension of the spine
MultifidusSacrum and transverse process of lumbar, thoracic and cervical vertebraeSpineous process of 2nd - 4th vertebrae above each originExtension and rotation of the spine
Quadratus lumboriumIliac Crest12th rib and transverse process of L1-L4Lateral flexion and extension of spine and laterally tilts the pelvis
Rectus abdominusPubisCartilage of the 5th - 7th rib and base of the sternumFlexion and lateral flexion of hte spine, and posteriorly tilts the pelvis
Internal ObliquesIliac crest and thoracolumbar fasciaLower 3 ribs and the fascial connection to the linea albaRotation and lateral flexion of the spine
External obliquesOuter Surface of the 6-12th ribsIliac crest, the pubis and the fascial connection to the linea albaRotation and lateral flexion of the spine
Transverse abdominusIliac crest, thoracolumbar fascia and 6 lower ribsPubis and fascial connection to the linea albaCompresses and supports the abdominal contents
DiaphragmBase of sternum, inner surface of lower 6 ribs and upper 3 lumbar vertebraecentral tendon of diaphragmDraws the central diaphragmatic tendon downwards increasing the volume of the thorax
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