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Neurology passmedicine 2

Key Concepts:

Terms in this set (106)

anterior cerebral artery

1: An ischemic stroke due to an obstruction of the posterior cerebral artery would result in a contralateral hemianopia with macular sparing. This is because the posterior cerebral artery supplies blood to occipital lobe which is responsible for visual processing. However, the region receiving information from the macula also has a dual blood supply from the deep branches of the middle cerebral artery.

2: The anterior cerebral artery supplies the motor and sensory cortices preferably on the medial side of the cerebral hemisphere and results in symptoms in the lower limbs.

3: The middle cerebral artery supplies the motor and sensory cortices but would be more likely to affect the region supplying the upper limbs than the lower limbs. The face can also be affected when the middle cerebral artery is occluded resulting in a unilateral droop. In addition, the language centers can be affected if the stroke occurs on the dominant side of the brain or hemineglect can happen if the stroke occurs on the non-
dominant side.

4: An Ischemic stroke of the areas supplied by the basilar artery can result in more severe neurological impairment such as locked-in syndrome or quadriplegia. This is because of the extremely important areas of the brainstem such as the pons, medulla, and midbrain which receive blood from the basilar artery.

5: An occlusion of the posterior inferior cerebellar artery would have produced impairment, hoarseness of the voice as well as a loss of the gag reflex.