Stroke Localization of Function
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| show | * areas on the left side (hemisphere) of the brain (lesion also impairs reading/writing/understanding and expressing language)
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| What causes aphasia? | show 🗑
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| What types of aphasia are there? | show 🗑
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| show | * Damage to the temporal lobe of the brain may result in a fluent aphasia called Wernicke's aphasia .... * Speak "Word Salad" and have no clue they are doing it
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| Non-fluent aphasia = ? | show 🗑
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| show | * right-sided weakness or paralysis of the arm and leg because the frontal lobe is also important for motor movements
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| Amnesia and the hippocampus = ? | show 🗑
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| A stroke in a deep area of the brain (for example, a stroke in the thalamus, the basal ganglia or pons) is called ? | show 🗑
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| show | * These deeper structures receive their blood flow through a unique set of arteries. Because of the characteristics of these arteries, lacunar strokes happen a little bit differently from other strokes
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| How a Lacunar Stroke Occurs ? | show 🗑
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| show | * All depend on the area it takes place in : Weakness or paralysis of the face, arm, leg, foot or toes
-- Sudden numbness
-- Difficulty walking
-- Difficulty speaking
-- Clumsiness of a hand or arm
-- Weakness or paralysis of eye muscles
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| show | * All of the past CxSx, and emotional behavior and dementia.
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| Lacunar Stroke Prognosis ? | show 🗑
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| show | * Each hemifield is projected onto the nasal
hemiretina of the ipsilateral1 eye and the temporal hemiretina of the contralateral eye
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| show | * The axons of ganglion cells exit the eyes via the optic nerve, partially cross at the optic
chiasm, and form two optic tracts, so that the right and left hemifields reach the left and right hemispheres
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| Central Projections of the retina (4 of them)? | show 🗑
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| show | * Edinger-Westphal nuclei
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| Is the major target of the retinal ganglion cells ? | show 🗑
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| LGN layers = ? | show 🗑
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| A lesion of the right optic nerve causes = ? | show 🗑
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| A lesion of the optic chiasm = ? | show 🗑
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| show | * complete loss of vision in the left hemifield:
contralateral “homonymous” hemianopsia.
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| show | * loss of vision in the left
hemifield: contralateral “homonymous” hemianopsia
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| A lesion of the right optic radiation specific to Meyer’s loop = ? | show 🗑
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| show | * loss of vision in the
lower quadrant of the left hemifield
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| show | * complete loss of vision in the left hemifield but
they usually spare foveal vision, probably because the cortical foveal representation is so
extensive that a single lesion is unlikely to destroy it all
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