MICRO
CNS (1).pptx

345 the important structures which are located in the

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The important structures which are located in the cortical territory of Anterior cerebral artery are : - Motor area of leg and perineum Sensory area of leg and perineum Micturition and defecation centres. Multimodal association areas of frontal cortex. Important structure located in deep branch of Anterior cerebral Artery :- Anterior limbs of internal capsule 346
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Anterior cerebral artery occlusion can cause - a) Urinary retention (May 93) b) Contralateral lower leg weakness c) Hemianaeshsia of opposite side of face d) Hemianopia B 348
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Memory impairment occurs in embolism of posterior cerebral artery because of damage to (Dec 94) a) Hipppocampal gyrus b) Superior temporal gyrus c) Prefrontal gyrus d) Angular gyrus 349
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Posterior cerebral artery has two parts i) Cortical or peripheral branch ii) Central branch 350
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The main area supplied by cortical branches are: - Inferior temporal gyrus which contains hippocampus. Lateral surface of occipital lobe which contains the visual area of occipital branch of posterior cerebral artery. 351
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The area supplied by central branch of posterior cerebral artery:- The central branch of the posterior cerebral artery supplies the brain stem. The brain stem is crowded with important structures. Therefore occlusion of posterior cerebral artery produces a greater variety of clinical effects than any other artery. 352
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Structures involved in the brainstem are: - Thalamus Hypothalanus Cerebral peduncle (It contains costicospinal and corticobulbar tracts) Third nerve 353
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354
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Memory impairment occurs in embolism of posterior cerebral artery because of damage to (Dec 94) a) Hipppocampal gyrus b) Superior temporal gyrus c) Prefrontal gyrus d) Angular gyrus A 355
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Anterior spinal artery throbosis is characterized by- a) Loss of pain & touch (PGI Dec 2000) b) Loss of vibration sense c) Loss of power in lower limb d) Sphincter dysfuction 356
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Anterior spinal artery throbosis is characterized by- a) Loss of pain & touch (PGI Dec 2000) b) Loss of vibration sense c) Loss of power in lower limb d) Sphincter dysfuction A, B, D. 358
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Lacunar infarcts are caused by - (AI 01) a) Lipohyalinosis of penetrating arteries b) Middle carotid artery involvement c) Emboli to anterior circulation d) None of the above 359
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Lacunar infarcts are small infarcts in the deep white matter of the cerebral hemisphere or brainstem. In lacunar infarcts small penetrating branches of cerebral arteries are occluded , it results in infarcts so small as to cause no symptoms whatsoever. As the softened tissue is removed , it leaves a small cavity or lacunae.
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  • Winter '16
  • jean grey

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