PT 506 Chapter Notes - Chapter 9: Nuchal Ligament, Sagittal Plane, Sacrococcygeal Symphysis
31 Jan 2021
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Document Summary
Between adjacent spinous processes from c7 to the sacrum. Contains high percentage of elastin; immediately posterior to spinal cord; thickest in lumbar region. Ligamentum nuchae is the cervical and cranial extension of the supraspinous ligaments, providing midline structure for muscle attachments and head support. Between basilar part of occipital bone and entire length of anterior surfaces of all vertebral bodies including the sacrum. Throughout length of the posterior surfaces of all vertebral bodies, between the axis and sacrum. Limits extension or excessive lordosis in cervical and lumbar regions. Few fibers in the cervical region; in thoracic region ligs are intertwined with local muscle; in lumbar region ligs are thin and membranous. Best developed in lumbar spine, twice the tensile strength of pll. Lies within vertebral canal, just anterior to spinal cord. Loose in anatomic position becomes taut at extreme positions. Two large lateral masses, joined by anterior and posterior arches. Large superior articular processes that support atlas and cranium.
