{"id":36427,"date":"2026-04-01T15:55:38","date_gmt":"2026-04-01T10:25:38","guid":{"rendered":"https:\/\/atsixty.com\/?p=36427"},"modified":"2026-04-03T15:14:06","modified_gmt":"2026-04-03T09:44:06","slug":"nervous-system-pathology-mcq","status":"publish","type":"post","link":"https:\/\/atsixty.com\/index.php\/2026\/04\/01\/nervous-system-pathology-mcq\/","title":{"rendered":"Nervous System Pathology MCQ"},"content":{"rendered":"\n<div id=\"atsixty-nsp-quiz\">\n<style>\n#atsixty-nsp-quiz {\n  --terra: #C0603A;\n  --terra-light: #d4795a;\n  --terra-pale: #fdf3ef;\n  --teal: #2A7A6F;\n  --teal-light: #3a9688;\n  --teal-pale: #eef6f5;\n  --ink: #1e1e1e;\n  --muted: #6b6b6b;\n  --rule: #e2d8d4;\n  --correct-bg: #e8f5e9;\n  --correct-border: #43a047;\n  --wrong-bg: #fdecea;\n  --wrong-border: #e53935;\n  --white: #fff;\n  --shadow: 0 2px 16px rgba(192,96,58,0.08);\n  font-family: Georgia, 'Times New Roman', serif;\n  color: var(--ink);\n  margin: 1rem 0 2rem;\n}\n#atsixty-nsp-quiz * { box-sizing: border-box; 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CT shows a deep intraparenchymal haemorrhage in the basal ganglia. The most likely underlying vascular lesion is:\",\n      correctAnswer: \"Charcot-Bouchard microaneurysm\",\n      opts: [\n        \"Charcot-Bouchard microaneurysm\",\n        \"Saccular aneurysm of the circle of Willis\",\n        \"Cerebral amyloid angiopathy\",\n        \"Dural arteriovenous malformation\"\n      ],\n      exp: \"<strong>Hypertensive intracerebral haemorrhage<\/strong> classically affects the basal ganglia, thalamus, pons, or cerebellum and results from rupture of <strong>Charcot-Bouchard microaneurysms<\/strong> in small penetrating arteries \u2014 a direct consequence of chronic hypertension-induced lipohyalinosis.\",\n      difficulty: \"easy\"\n    },\n    {\n      q: \"An elderly normotensive patient presents with recurrent lobar haemorrhages. Which underlying pathology is most likely?\",\n      correctAnswer: \"Cerebral amyloid angiopathy\",\n      opts: [\n        \"Hypertensive arteriolosclerosis\",\n        \"Cerebral amyloid angiopathy\",\n        \"Berry aneurysm\",\n        \"Septic embolisation\"\n      ],\n      exp: \"<strong>Cerebral amyloid angiopathy (CAA)<\/strong>: \u03b2-amyloid deposits in cortical and leptomeningeal vessel walls \u2192 lobar haemorrhages in elderly normotensive patients. Associated with Alzheimer disease. Hypertensive bleeds are deep (basal ganglia, thalamus) \u2014 lobar location in a normotensive patient should always raise CAA.\",\n      difficulty: \"medium\"\n    },\n    {\n      q: \"A 71-year-old develops sudden aphasia and right hemiparesis. MRI confirms a left MCA territory infarct. Which pathological sequence best describes evolution over the following weeks?\",\n      correctAnswer: \"Liquefactive necrosis followed by cystic cavitation and gliosis\",\n      opts: [\n        \"Coagulative necrosis followed by fibrosis\",\n        \"Liquefactive necrosis followed by cystic cavitation and gliosis\",\n        \"Caseous necrosis with granuloma formation\",\n        \"Fibrinoid necrosis followed by calcification\"\n      ],\n      exp: \"Unlike solid organs (coagulative necrosis), the CNS undergoes <strong>liquefactive necrosis<\/strong> due to its high lipid content and abundant proteolytic enzymes. Macrophages clear the debris \u2192 <strong>cystic cavity<\/strong> lined by reactive astrocytic gliosis.\",\n      difficulty: \"easy\"\n    },\n    {\n      q: \"A young adult presents with thunderclap headache and neck stiffness. CT shows subarachnoid blood around the circle of Willis. The most likely source is:\",\n      correctAnswer: \"Ruptured berry aneurysm\",\n      opts: [\n        \"Ruptured Charcot-Bouchard aneurysm\",\n        \"Ruptured berry aneurysm\",\n        \"Middle meningeal artery rupture\",\n        \"Bridging vein tear\"\n      ],\n      exp: \"<strong>Subarachnoid haemorrhage<\/strong>: 'worst headache of life' + meningism + blood in basal cisterns = ruptured <strong>berry aneurysm<\/strong> until proven otherwise. Charcot-Bouchard microaneurysms cause deep parenchymal bleeds. Middle meningeal rupture = epidural haematoma (biconvex). Bridging vein tear = subdural (crescent-shaped).\",\n      difficulty: \"easy\"\n    },\n    {\n      q: \"Which CSF profile is most consistent with acute pyogenic meningitis?\",\n      correctAnswer: \"Neutrophilic pleocytosis, high protein, low glucose\",\n      opts: [\n        \"Lymphocytic pleocytosis, normal glucose, mildly raised protein\",\n        \"Neutrophilic pleocytosis, high protein, low glucose\",\n        \"Acellular CSF with very high glucose\",\n        \"Monocytic pleocytosis with low protein\"\n      ],\n      exp: \"<strong>Acute bacterial meningitis<\/strong>: neutrophilic pleocytosis (thousands\/mm\u00b3), very low glucose (&lt;50% serum), high protein, turbid CSF. Viral meningitis: lymphocytes, normal glucose. TB meningitis: lymphocytes, very low glucose, very high protein, subacute onset. Cryptococcal: India ink positive.\",\n      difficulty: \"easy\"\n    },\n    {\n      q: \"A child presents with fever, neck rigidity, and purpuric rash. The organism most strongly associated with fulminant meningitis and Waterhouse-Friderichsen syndrome is:\",\n      correctAnswer: \"Neisseria meningitidis\",\n      opts: [\n        \"Streptococcus pneumoniae\",\n        \"Haemophilus influenzae\",\n        \"Neisseria meningitidis\",\n        \"Listeria monocytogenes\"\n      ],\n      exp: \"<strong>Meningococcal meningitis<\/strong>: petechial\/purpuric rash (endotoxin-mediated DIC) + <strong>Waterhouse-Friderichsen syndrome<\/strong> (bilateral adrenal haemorrhage \u2192 acute adrenal insufficiency). Gram-negative diplococcus. Strep pneumoniae is the most common cause in adults but does not produce the purpuric rash. Listeria: neonates, elderly, immunocompromised.\",\n      difficulty: \"medium\"\n    },\n    {\n      q: \"A patient dies after hydrophobia, aerophobia, and progressive encephalitis following a dog bite. Histology is most likely to show:\",\n      correctAnswer: \"Negri bodies in hippocampal neurons\",\n      opts: [\n        \"Cowdry type A inclusions in temporal lobe neurons\",\n        \"Negri bodies in hippocampal neurons\",\n        \"Caseating granulomas in basal ganglia\",\n        \"Perivascular demyelinating plaques\"\n      ],\n      exp: \"<strong>Rabies<\/strong>: lyssavirus; retrograde axonal transport to CNS. <strong>Negri bodies<\/strong> = eosinophilic cytoplasmic inclusions in hippocampal pyramidal cells and Purkinje cells \u2014 pathognomonic. Cowdry A inclusions = HSV encephalitis (temporal lobe). Perivascular demyelination = ADEM or MS.\",\n      difficulty: \"medium\"\n    },\n    {\n      q: \"Multiple sclerosis is pathologically characterised by:\",\n      correctAnswer: \"Sharply demarcated plaques of demyelination in CNS white matter\",\n      opts: [\n        \"Diffuse cortical neuronal loss with Lewy bodies\",\n        \"Sharply demarcated plaques of demyelination in CNS white matter\",\n        \"Segmental demyelination confined to peripheral nerves\",\n        \"Widespread vasculitic infarction of grey matter\"\n      ],\n      exp: \"<strong>MS plaques<\/strong>: periventricular, optic nerves, corpus callosum, brainstem, spinal cord \u2014 sharply demarcated zones of myelin loss with relative axonal preservation early, evolving to gliosis. 'Dawson's fingers' on MRI = periventricular plaques perpendicular to ventricles. PNS myelin (Schwann cells) is unaffected.\",\n      difficulty: \"easy\"\n    },\n    {\n      q: \"Which microscopic feature correlates best with severity of dementia in Alzheimer disease?\",\n      correctAnswer: \"Neurofibrillary tangles\",\n      opts: [\n        \"Senile plaques alone\",\n        \"Lewy bodies\",\n        \"Neurofibrillary tangles\",\n        \"Rosenthal fibres\"\n      ],\n      exp: \"<strong>Neurofibrillary tangles (NFTs)<\/strong>: intraneuronal paired helical filaments of hyperphosphorylated tau. Braak staging of NFT burden correlates with cognitive decline better than plaque count. Senile plaques (extracellular A\u03b2) appear earlier but correlate less precisely with dementia severity. Rosenthal fibres = pilocytic astrocytoma.\",\n      difficulty: \"medium\"\n    },\n    {\n      q: \"A patient with resting tremor, bradykinesia, and cogwheel rigidity most likely has degeneration of neurons in the:\",\n      correctAnswer: \"Substantia nigra pars compacta\",\n      opts: [\n        \"Substantia nigra pars compacta\",\n        \"Dentate nucleus\",\n        \"Caudate head\",\n        \"Nucleus ambiguus\"\n      ],\n      exp: \"<strong>Parkinson disease<\/strong>: loss of dopaminergic neurons in the <strong>substantia nigra pars compacta<\/strong> \u2192 depleted striatal dopamine \u2192 poverty of movement. Surviving neurons contain <strong>Lewy bodies<\/strong> (\u03b1-synuclein). Caudate head degeneration = Huntington disease. Nucleus ambiguus lesion = dysphagia\/dysphonia.\",\n      difficulty: \"easy\"\n    },\n    {\n      q: \"Which pathological finding is most characteristic of Creutzfeldt-Jakob disease?\",\n      correctAnswer: \"Spongiform vacuolation without significant inflammation\",\n      opts: [\n        \"Caseating granulomas with Langhans giant cells\",\n        \"Spongiform vacuolation without significant inflammation\",\n        \"Perivascular lymphocytic cuffing with demyelination\",\n        \"Suppurative necrosis with neutrophilic abscesses\"\n      ],\n      exp: \"<strong>Prion diseases (CJD)<\/strong>: misfolded PrP<sup>Sc<\/sup> accumulates \u2192 spongiform vacuolation of grey matter, neuronal loss, reactive astrogliosis \u2014 <em>without inflammation<\/em>. This absence of inflammatory infiltrate despite devastating neurodegeneration is the hallmark. Confirmed by RT-QuIC or brain biopsy.\",\n      difficulty: \"hard\"\n    },\n    {\n      q: \"A patient briefly loses consciousness after head trauma, regains it, then deteriorates rapidly. The most likely diagnosis is:\",\n      correctAnswer: \"Epidural haematoma\",\n      opts: [\n        \"Epidural haematoma\",\n        \"Subdural haematoma\",\n        \"Diffuse axonal injury\",\n        \"Subarachnoid haemorrhage\"\n      ],\n      exp: \"<strong>Epidural haematoma<\/strong>: classic <strong>lucid interval<\/strong> \u2014 arterial bleed from middle meningeal artery (temporal bone fracture at the pterion) rapidly expands \u2192 brain compression. Biconvex hyperdense collection on CT. Surgical emergency with excellent outcome if treated promptly. DAI: immediate coma, no lucid interval.\",\n      difficulty: \"easy\"\n    },\n    {\n      q: \"A frail elderly patient becomes progressively drowsy over 10 days after a trivial fall. CT is most likely to show:\",\n      correctAnswer: \"Subdural haematoma due to torn bridging veins\",\n      opts: [\n        \"Subdural haematoma due to torn bridging veins\",\n        \"Epidural haematoma due to middle meningeal artery rupture\",\n        \"Pontine haemorrhage due to hypertension\",\n        \"Lacunar infarct in the internal capsule\"\n      ],\n      exp: \"<strong>Chronic subdural haematoma<\/strong>: cerebral atrophy in the elderly stretches bridging veins \u2192 trivial trauma tears them \u2192 slow venous bleed over days-weeks. CT: crescent-shaped collection, may be isodense at 2\u20133 weeks (subacute phase). Treated with burr-hole drainage.\",\n      difficulty: \"easy\"\n    },\n    {\n      q: \"Which histological combination is most characteristic of glioblastoma?\",\n      correctAnswer: \"Pseudopalisading necrosis and microvascular proliferation\",\n      opts: [\n        \"Verocay bodies and Antoni A areas\",\n        \"Pseudopalisading necrosis and microvascular proliferation\",\n        \"Whorls with psammoma bodies\",\n        \"Fried-egg cells with chicken-wire vasculature\"\n      ],\n      exp: \"<strong>Glioblastoma (WHO Grade 4)<\/strong>: <strong>pseudopalisading necrosis<\/strong> (tumour cells palisade around central necrotic zones) + <strong>microvascular proliferation<\/strong> (glomeruloid endothelial tufts driven by tumour VEGF). Verocay bodies = schwannoma. Whorls + psammoma = meningioma. Fried-egg + chicken-wire = oligodendroglioma.\",\n      difficulty: \"medium\"\n    },\n    {\n      q: \"A patient develops ascending weakness one week after a diarrhoeal illness. Nerve conduction studies suggest demyelination. The most likely pathology is:\",\n      correctAnswer: \"Acute inflammatory demyelinating polyneuropathy\",\n      opts: [\n        \"Motor neuron disease\",\n        \"Acute inflammatory demyelinating polyneuropathy\",\n        \"Myasthenia gravis\",\n        \"Duchenne muscular dystrophy\"\n      ],\n      exp: \"<strong>Guillain-Barr\u00e9 syndrome (GBS)<\/strong> = acute inflammatory demyelinating polyneuropathy. Post-infectious molecular mimicry (Campylobacter jejuni, CMV, EBV) \u2192 anti-ganglioside antibodies \u2192 macrophage-mediated peripheral nerve demyelination. Ascending flaccid paralysis, areflexia, albuminocytological dissociation on CSF. Treatment: IVIG or plasmapheresis.\",\n      difficulty: \"medium\"\n    }\n  ];\n\n  function shuffle(arr) {\n    const a = [...arr];\n    for (let i = a.length - 1; i > 0; i--) {\n      const j = Math.floor(Math.random() * (i + 1));\n      [a[i], a[j]] = [a[j], a[i]];\n    }\n    return a;\n  }\n\n  let session = [], answered = [], total = 0;\n\n  function prepareSession() {\n    session = shuffle(BANK).map(q => {\n      const opts = shuffle(q.opts);\n      return { ...q, opts, ansIdx: opts.indexOf(q.correctAnswer) };\n    });\n    answered = new Array(session.length).fill(null);\n    total = 0;\n    Q.sn.textContent = '0';\n    Q.sm.textContent = session.length * 4;\n  }\n\n  function diffBadge(d) {\n    return d ? `<span class=\"diff diff-${d}\">${d}<\/span>` : '';\n  }\n\n  function buildQuiz() {\n    Q.container.innerHTML = '';\n    Q.sr.textContent = session.length;\n\n    session.forEach((q, i) => {\n      const card = document.createElement('div');\n      card.className = 'q-card';\n\n      const letters = ['A','B','C','D'];\n      const optsHTML = q.opts.map((opt, j) => `\n        <div class=\"opt\" id=\"nsp-o-${i}-${j}\">\n          <span class=\"opt-letter\">${letters[j]}<\/span>\n          <span>${opt}<\/span>\n        <\/div>`).join('');\n\n      card.innerHTML = `\n        <div class=\"q-head\">\n          <div class=\"q-num\" id=\"nsp-n-${i}\">${i + 1}<\/div>\n          <div class=\"q-text\">${q.q}<\/div>\n        <\/div>\n        <div class=\"options\">${optsHTML}<\/div>\n        <div class=\"explanation\" id=\"nsp-e-${i}\">\n          <div class=\"exp-label\">Explanation ${diffBadge(q.difficulty)}<\/div>\n          ${q.exp}\n        <\/div>`;\n\n      Q.container.appendChild(card);\n      q.opts.forEach((_, j) => {\n        document.getElementById(`nsp-o-${i}-${j}`)\n          .addEventListener('click', () => answer(i, j));\n      });\n    });\n\n    Q.submit.classList.remove('visible');\n  }\n\n  function answer(qi, oi) {\n    if (answered[qi] !== null) return;\n    const q = session[qi];\n    const ok = oi === q.ansIdx;\n    answered[qi] = ok ? 'correct' : 'wrong';\n    total++;\n\n    q.opts.forEach((_, j) => {\n      const el = document.getElementById(`nsp-o-${qi}-${j}`);\n      if (j === q.ansIdx)       el.classList.add('correct');\n      else if (j === oi && !ok) el.classList.add('wrong');\n      else                      el.classList.add('dimmed');\n    });\n\n    document.getElementById(`nsp-e-${qi}`).classList.add('show');\n    document.getElementById(`nsp-n-${qi}`).classList.add(ok ? 'answered-c' : 'answered-w');\n\n    updateStats();\n    updateProgress();\n    if (total === session.length) Q.submit.classList.add('visible');\n  }\n\n  function updateStats() {\n    const c = answered.filter(a => a === 'correct').length;\n    const w = answered.filter(a => a === 'wrong').length;\n    const r = answered.filter(a => a === null).length;\n    const n = (c * 4) - w;\n    Q.sc.textContent = c;\n    Q.sw.textContent = w;\n    Q.sr.textContent = r;\n    Q.sn.textContent = n >= 0 ? '+' + n : n;\n    Q.sm.textContent = session.length * 4;\n  }\n\n  function updateProgress() {\n    Q.progress.style.width = (total \/ session.length * 100) + '%';\n  }\n\n  function showScore() {\n    const c  = answered.filter(a => a === 'correct').length;\n    const w  = answered.filter(a => a === 'wrong').length;\n    const sk = answered.filter(a => a === null).length;\n    const mx = session.length * 4;\n    const ns = (c * 4) - w;\n    const pc = Math.round((ns \/ mx) * 100);\n    const bw = Math.max(0, Math.min(100, pc));\n    const msg = pc >= 85 ? 'Outstanding! Strong command of nervous system pathology.' :\n                pc >= 65 ? 'Good foundation \u2014 revisit the explanations for the near misses.' :\n                pc >= 50 ? 'Reasonable base \u2014 one more active revision cycle will help.' :\n                pc >= 0  ? 'Targeted revision is advised before moving on.' :\n                           'Negative net score \u2014 in NEET-PG, blind guessing hurts.';\n\n    Q.score.innerHTML = `\n      <h2>Quiz Complete<\/h2>\n      <div class=\"score-num\">${ns < 0 ? ns : '+' + ns}<\/div>\n      <div class=\"score-denom\">Net Score &nbsp;|&nbsp; Max Marks: ${mx}<\/div>\n      <div class=\"grade-bar\"><div class=\"grade-fill\" style=\"width:${bw}%\"><\/div><\/div>\n      <div class=\"score-breakdown\">\n        <span><strong>${c}<\/strong><br>Correct<br><small>(+${c * 4})<\/small><\/span>\n        <span><strong>${w}<\/strong><br>Wrong<br><small>(\u2212${w})<\/small><\/span>\n        <span><strong>${sk}<\/strong><br>Skipped<br><small>(0)<\/small><\/span>\n        <span><strong>${Math.max(0, pc)}%<\/strong><br>Score%<\/span>\n      <\/div>\n      <div class=\"score-formula\">\n        Net = (${c} \u00d7 4) \u2212 ${w} = <strong>${ns}<\/strong>\n        &nbsp;|&nbsp; ${ns} \u00f7 ${mx} \u00d7 100 = <strong>${pc}%<\/strong>\n      <\/div>\n      <div class=\"score-msg\">${msg}<\/div>\n      <button class=\"btn-retry\" id=\"nsp-retry\">\u21ba Reshuffle &amp; Retry<\/button>`;\n\n    Q.score.style.display = 'block';\n    Q.submit.classList.remove('visible');\n    Q.score.scrollIntoView({ behavior: 'smooth' });\n    document.getElementById('nsp-retry').addEventListener('click', retryQuiz);\n  }\n\n  function retryQuiz() {\n    Q.score.style.display = 'none';\n    prepareSession();\n    updateStats();\n    updateProgress();\n    buildQuiz();\n    window.scrollTo({ top: 0, behavior: 'smooth' });\n  }\n\n  Q.submit.addEventListener('click', showScore);\n  prepareSession();\n  buildQuiz();\n  updateStats();\n\n  new IntersectionObserver(\n    ([e]) => document.getElementById('nsp-status-bar')\n                      .classList.toggle('visible', !e.isIntersecting),\n    { threshold: 0 }\n  ).observe(document.getElementById('nsp-sentinel'));\n\n})();\n<\/script>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u2713 0 \u2717 0 Left 15 Net 0 Max 60 View Score \u2192<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[24],"tags":[],"class_list":["post-36427","post","type-post","status-publish","format-standard","hentry","category-neet-pg"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - 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