ch_11_part2 - 11-5 Axial Musculature Muscles of the...

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11-5 Axial Musculature Muscles of the Vertebral Column Spinal extensors or erector spinae muscles (superficial and deep) Spinal flexors (transversospinalis)
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11-5 Axial Musculature Muscles of the Vertebral Column Deep Spinal Extensors Semispinalis group Multifidus muscle Interspinalis muscles Intertransversarii muscles Rotatores muscles
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Figure 11-10 Muscles of the Vertebral Column Erector Spinae, Deep Layer Semispinalis Group Semispinalis capitis Semispinalis cervicis Semispinalis thoracis Multifidus Erector Spinae, Superficial Layer Splenius capitis Spinalis, Longissimus, and Iliocostalis Group Longissimus capitis Spinalis cervicis Longissimus cervicis Iliocostalis cervicis Iliocostalis thoracis Longissimus thoracis Spinalis thoracis Iliocostalis lumborum
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Table 11-8 Muscles of the Vertebral Column (Figure 11–10)
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11-5 Axial Musculature Muscles of the Vertebral Column Superficial Spinal Extensors Spinalis group Longissimus group Iliocostalis group
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11-5 Axial Musculature Muscles of the Vertebral Column Spinal Flexors Neck Longus capitis and longus colli Rotate and flex the neck Lumbar Quadratus lumborum muscles Flex spine and depress ribs
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Figure 11-10 Muscles of the Vertebral Column Intervertebral Muscles, Posterior View Rotatores Intertransversarii Spinous process of vertebra Transverse process of vertebra Interspinales Posterior view Spinal Flexors Quadratus lumborum Flexors of the Anterior Cervical and Thoracic Spine Thoracodorsal fascia Longus capitis Longus colli Erector Spinae, Deep Layer
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Table 11-8 Muscles of the Vertebral Column (Figure 11–10)
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11-5 Axial Musculature Oblique and Rectus Muscles Lie within the body wall Oblique muscles Compress underlying structures Rotate vertebral column Rectus muscles Flex vertebral column Oppose erector spinae
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11-5 Axial Musculature Oblique Muscles Cervical region Scalene muscles Flex the neck Thoracic region Intercostal muscles (external and internal) Respiratory movements of ribs Transversus thoracis Cross inner surface of ribs
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11-5 Axial Musculature Oblique Muscles Abdominopelvic region (same pattern as thoracic) External oblique muscles Internal oblique muscles Transversus abdominis
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11-5 Axial Musculature Rectus Muscles Rectus abdominis Between xiphoid process and pubic symphysis Divided longitudinally by linea alba Divided transversely by tendinous inscriptions
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11-5 Axial Musculature Rectus Muscles Diaphragmatic muscle or diaphragm Divides thoracic and abdominal cavities Performs respiration
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Figure 11-11a Oblique and Rectus Muscles and the Diaphragm Scalenes Anterior Middle Posterior Anterior view, cervical region
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