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IMF-081-01-0001-en	Why do the lower spinal roots descend as the cauda equina?	The vertebral column grows more than the cord, so the adult cord ends at the conus near L1 or L2 and the lower roots must descend below it.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0002-en	How can the proportions of grey and white matter indicate the level of a spinal cord section?	Cervical cord has abundant white matter, the lumbar enlargement has broad grey horns, and thoracic cord has a lateral horn.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0003-en	What distinguishes the contents of the dorsal-root ganglion from those of the ventral root?	The dorsal-root ganglion holds pseudounipolar sensory cell bodies, whereas the ventral root carries somatic motor and preganglionic autonomic motor axons.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0004-en	How is sensory processing divided between superficial and deeper parts of the dorsal horn?	Superficial laminae process nociception and temperature, while deeper regions integrate touch and proprioception.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0005-en	How are lower motor neurons in the ventral horn arranged by the muscles they supply?	They are somatotopic: medial groups supply axial and proximal muscles and lateral groups supply distal limbs, while flexor-extensor organisation is less absolute.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0006-en	Where in the cord do sympathetic and sacral parasympathetic preganglionic neurons lie?	Sympathetic preganglionic neurons form the intermediolateral cell column from T1 to L2, and sacral parasympathetic neurons lie at S2 through S4.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0007-en	Why does reflex intensity not simply report the integrity of a single root?	Even the monosynaptic core of the stretch reflex is modulated by interneurons and descending control, so intensity reflects peripheral and central excitability.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0008-en	Why does a spinal cord lesion impair vibration and position sense on the same side, but a brainstem lesion above the crossing affects the opposite side?	First-order dorsal-column axons ascend ipsilaterally without synapsing in the cord and cross only as internal arcuate fibres after synapsing in the caudal medulla.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0009-en	Why does sensory ataxia worsen when the eyes are closed?	Vision compensates for lost proprioception, so removing it unmasks the deficit.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0010-en	Why does a unilateral cord lesion cause contralateral pain and temperature loss beginning slightly below the lesion?	Afferents travel briefly in Lissauer tract and synapse, then second-order axons cross in the anterior white commissure over one or several segments before ascending contralaterally.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0011-en	Why can a syrinx cause bilateral segmental pain-temperature loss with preserved dorsal-column sensation?	Central cord expansion damages the crossing anterolateral fibres near the centre, while the dorsal columns lie outside that zone.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0012-en	How do spinothalamic projections differ in role from spinoreticular and spinomesencephalic projections?	Spinothalamic fibres reach thalamus and cortex for localisation and discrimination, whereas spinoreticular and spinomesencephalic pathways influence arousal, autonomic response and modulation.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0013-en	Why does the anterior spinocerebellar tract end functionally ipsilateral although many fibres cross in the cord?	After entering the cerebellum through the superior cerebellar peduncle, the fibres cross again, cancelling the first crossing.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0014-en	A spinocerebellar lesion and peripheral proprioceptive loss both cause ataxia. How do they differ?	Spinocerebellar lesions cause ipsilateral limb or gait incoordination but rarely conscious sensory loss; eye dependence, reflexes and other signs separate the two.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0015-en	Why does a cord lesion cause ipsilateral upper motor-neuron signs, while a lesion above the medulla causes contralateral weakness?	Most corticospinal fibres cross at the pyramidal decussation in the medulla, so below it they already serve the same side of the body.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0016-en	What distinguishes the lateral corticospinal tract from the anterior corticospinal tract?	The lateral tract carries most fibres, crossed at the pyramids, and supports fractionated distal movement; the smaller anterior tract influences axial muscles and often crosses near termination.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0017-en	Which findings distinguish an upper motor-neuron lesion from a lower motor-neuron lesion?	Upper motor-neuron lesions cause hyperreflexia, clonus and an extensor plantar response after an initial flaccid phase; lower motor-neuron lesions cause atrophy, fasciculation and reduced reflexes.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0018-en	Why can a lesion at cord level produce a mixed upper and lower motor-neuron picture?	At the lesion level both the segmental motor neurons and the long descending tracts passing through are affected at once.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0019-en	Why can a cervical cord lesion cause Horner syndrome?	Descending hypothalamospinal sympathetic fibres run in the dorsolateral cord toward intermediolateral neurons, so a cervical lesion can interrupt the fibres destined for the face.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0020-en	How does bladder dysfunction differ between suprasacral lesions and conus, cauda or peripheral lesions?	Suprasacral lesions cut sacral circuits off from pontine and cortical coordination, causing detrusor-sphincter dyssynergia; conus, cauda or peripheral lesions cause areflexic patterns.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0021-en	How do high cord injuries cause neurogenic shock early and autonomic dysreflexia later?	Loss of sympathetic cardiovascular control causes neurogenic shock; later, with lesions above about T6, stimuli below trigger an unmodulated sympathetic reflex with severe hypertension.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0022-en	Why does anterior spinal artery infarction relatively spare vibration and position sense?	The anterior spinal artery supplies the anterior two-thirds, including corticospinal and anterolateral systems, while the dorsal columns are supplied by the posterior spinal arteries.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0023-en	Why does Brown-Séquard hemicord syndrome split sensory loss between the two sides?	Uncrossed dorsal columns give ipsilateral loss below the lesion, while pain-temperature fibres that crossed near entry give contralateral loss beginning below it.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending
IMF-081-01-0024-en	How do conus medullaris and cauda equina lesions differ, and what do sacral sparing and early sacral dysfunction suggest?	Conus lesions give early symmetric saddle and sphincter loss with mixed motor signs; cauda lesions hit roots asymmetrically. Sacral sparing suggests an incomplete central lesion.	Integrated Medical Foundations; chapter 81, TTS module 1; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: 678d2fa8549f0afee81ad72a69ef734bef0edd626bda599cee6c3d6b63be736b; editorial review pending	imf lang::en chapter::081 module::081-01 review::pending