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MH_VICARS Module #4

Muslces of the Spine and Thorax

MusclesOriginInsertionAction
Splenius Capitis* Ligamentum nuchae, spinous process of c-7 to t-3 Mastoid process and lateral portion of superior nuchal line UNILATERALLY:rotates the head and neck to the same side, laterally flex the head and neck BILATERALLY: extends head and neck
Splenius Cervicis* Spinous Process of t-3 to t-6 Transverse prcesses of the upper cervical vertebrae UNILATERALLY:rotates the head and neck to the same side, laterally flex the head and neck BILATERALLY: extends head and neck
Quadratus Lumborum* Posterior illac crest Last rib and transverse processes of 1st- 4th lumbar vertebrae UNILATERALLY: laterally tilts pelvis, laterally flexes the vertebral column to the same side. BILATERALLY: assist to extend the veretbral column, fix thte last rib during inhalation and forced exhalation
Rectus Abdominis* Pubic crest, Pubic symphosis Cartilage of 5,6,7th ribs and xiphiod process Flexes the vertebral column
External Oblique* Lower eight ribs anterior part of hte illac crest, abdominal aponeurosis to linea alba UNILATERALLY: laterally flex the vertabral column to the same side, rotate vertebral column to the opposite side. BILATERALLY: flex vertebral column, compress abdominal contents
Internal Oblique* Lateral ingiunial ligament, illac crest and thoracolumbar fascia internal surfcae of lower three ribs, abdominal aponeurosis to linea alba UNILATERALLY: laterally flex the vertabral column to the same side, rotate vertebral column to the opposite side. BILATERALLY: flex vertebral column, compress abdominal contents
Transverse Abdominis* Lateral inguinal ligament, iilac crest, thoracolumbar fascia, and internal surface of lower six ribs abdominal aponeurosis to linea alba compress addominal contents
Diaphram inner surface of lower six ribs, upper two or three lumbar vertebrae, inner part of xiphiod process central tendon draw down the central tendon of the diaphram, increases volume of thoractic cavity during inhalation
Intercostals (external and internal) inferior border of the rib above superior border to rib below assist in inhalation and exhalation
Erector Spinae Group common tendon that attaches to the postieror surface of sacrum, i llac crest, spinous processes of the lumbar and last two thoracic vertebrae various attachments at the posterior ribs, spinous and transverse processes of thoracic and cervical vertebrae, and mastoid process of temporal bone laterally flex vertebral column to same side and extends vertebral column
Multifidi sacrum and transverse porcesses of lumbar through cervical vertebrae spinous processses of lumbar vertebrae through second cervical vertebrae ( spans 2-4 vertebrae) rotate the vertebral colum to the opposite side, and extends vertebral column
Rotatores transverse processes of lumbar through cervica vertebrae spinous processses of lumbar vertebrae through second cervical vertebrae (spans 1-2 vertebae) rotate the vertebral colum to the opposite side, and extends vertebral column
Semispilalis Capitis transverse processes of thoracic vertebrae, articular processes of lower cervicals spinous processes of upper thoracic and cervicals (except c-1), superioir nuchal line of occiput. extends vertebral column and head
Created by: Tara_Marie
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