#separator:Tab
#html:false
#tags column:5
IMF-076-01-0001-en	Why can small changes in vertebral alignment, disc structure, canal dimensions or muscular control affect pain, neural function and whole-body mechanics?	The back's anatomy balances stability, flexibility, load transmission and protection of the spinal cord and nerve roots, so a small change in one element shifts that whole balance.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0002-en	How do the parts of successive vertebrae create both the vertebral canal and the intervertebral foramina?	The vertebral foramina enclosed by successive arches line up to form the canal, while notches in adjacent pedicles form intervertebral foramina for spinal nerves and vessels.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0003-en	What distinguishes the atlas and axis from typical cervical vertebrae, and how does this allow head rotation?	The atlas lacks a body and supports the occipital condyles, while the axis bears the dens, which acts as the pivot around which the atlas rotates.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0004-en	How does facet-joint orientation explain why thoracic and lumbar regions favour different movements?	Coronal-oriented thoracic facets with overlapping spinous processes favour rotation and limit flexion and extension, whereas sagittal-oriented lumbar facets permit flexion and extension but resist rotation.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0005-en	How does the sacrum carry axial load from the vertebral column into the lower limbs?	Formed by five fused vertebrae, it transmits load through the sacroiliac joints to the pelvic ring and innominate bones, and from there to the lower limbs.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0006-en	Why are the thoracic and sacral curves called primary and the cervical and lumbar curves secondary?	The kyphotic thoracic and sacral curves reflect fetal flexion, while the cervical and lumbar lordoses develop later as the infant lifts the head and stands.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0007-en	Why do vertebral bodies enlarge inferiorly, and what resists the shear created at the lumbosacral junction?	Cumulative load rises down the column, and the lumbosacral angle produces anterior shear that facets, discs, ligaments and muscle must resist.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0008-en	What distinguishes scoliosis from a simple coronal bend, and why does it produce rib prominence?	Scoliosis is lateral curvature accompanied by vertebral rotation, and rotation of the thoracic vertebrae carries the ribs with it to create rib prominence.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0009-en	How do the annulus fibrosus and nucleus pulposus divide the mechanical work of the disc?	The annulus's concentric collagen lamellae with alternating fibre orientation resist torsion and tension, while the proteoglycan-rich nucleus distributes compression through hydrostatic pressure.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0010-en	Why do the cartilaginous endplates matter for the nutrition of the adult disc?	The adult disc is largely avascular, so it depends on diffusion from vertebral vessels through the cartilaginous endplates.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0011-en	Disc degeneration reduces proteoglycan, hydration and annular integrity. Why does degeneration on imaging not establish the cause of pain?	Imaging degeneration is common in people without pain, so its presence does not prove that the disc is the pain generator.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0012-en	Why is disc herniation more common posterolaterally, and what structure can it affect there?	The posterior longitudinal ligament gives less lateral reinforcement at that site, and material herniating there can affect a traversing nerve root.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0013-en	Why can disruption of the transverse ligament of the atlas by trauma or inflammatory disease be dangerous?	The transverse ligament holds the dens against the anterior arch of the atlas, so its failure can let the dens threaten the upper spinal cord.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0014-en	How do the anterior and posterior longitudinal ligaments differ in position and in the movement each limits?	The anterior ligament runs along the anterior bodies and discs and limits extension; the posterior ligament lies within the canal on the posterior bodies, limits flexion and partly reinforces the discs.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0015-en	How do the elastic fibres of the ligamenta flava contribute to spinal function?	Connecting adjacent laminae, their elastic fibres assist return from flexion and prevent the ligament from buckling.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0016-en	Why do lumbar and sacral nerve roots travel within the dural sac as the cauda equina?	The adult cord usually ends near the first or second lumbar vertebra as the conus medullaris, so lower roots must descend within the dural sac to reach their foramina.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0017-en	Why is lumbar puncture performed below the usual cord termination, and which layers does the needle cross before the arachnoid?	Entering the lumbar cistern below the cord avoids it; the needle crosses skin, fascia, supraspinous and interspinous ligaments, ligamentum flavum, epidural space and dura.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0018-en	How do dorsal and ventral rami of a mixed spinal nerve differ in the territories they supply?	Dorsal rami supply the intrinsic back structures, whereas ventral rami supply the anterolateral trunk and the limbs.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0019-en	Why is the anterior spinal cord vulnerable during aortic disease or surgery?	The anterior spinal artery territory includes much of the anterior two-thirds, and its segmental reinforcement to the lower cord, the great anterior segmental medullary artery, varies in side and level.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0020-en	What distinguishes the intrinsic deep back muscles from the superficial extrinsic muscles in innervation and function?	Intrinsic muscles are supplied by dorsal rami and extend, rotate, laterally flex and stabilise the column, while extrinsic muscles such as trapezius and latissimus dorsi connect the upper limb to the trunk.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0021-en	Why is spinal stability described as dynamic coordination rather than rigid bracing by one muscle?	Multifidus and abdominal-wall activation contribute segmental stiffness while the diaphragm and pelvic floor regulate pressure, so stability emerges from several coordinated systems.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0022-en	Radiculopathy produces pain, sensory change, weakness and reflex change in a root-related pattern. Why is that pattern only approximate?	Dermatomes and myotomes overlap, so the territory of one irritated root cannot be mapped exactly.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0023-en	Why does cervical or thoracic central stenosis cause myelopathy, whereas lumbar stenosis causes neurogenic claudication?	Cervical and thoracic stenosis compresses the cord, giving upper motor-neuron signs below the lesion, while lumbar stenosis affects cauda-equina roots, causing claudication relieved by flexion.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending
IMF-076-01-0024-en	Which features suggest cauda-equina syndrome, and what do it and conus lesions require?	Saddle sensory loss, bladder or bowel dysfunction, sexual dysfunction and bilateral or progressive leg deficits; both it and conus lesions need urgent anatomical localisation and decompression assessment.	Integrated Medical Foundations; chapter 76, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 0d59a62f2a7024d902206eae23110c23cca9470d538ed989186489042a0980f2; editorial review pending	imf lang::en chapter::076 module::076-01 review::pending