Neurology — Flashcards

Flashcard 291: A complete lesion of the right optic nerve results in which visual field defect? Answer: _____

Answer: Right anopia (monocular blindness)

Extra: Visual field defects based on lesion site: 1. Optic nerve: Monocular anopia 2. Optic chiasm (midline): Bitemporal hemianopia 3. Optic tract: Contralateral homonymous hemianopia 4. Meyer's loop (Temporal lobe): Contralateral superior quadrantanopia 5. Baum's loop (Parietal lobe): Contralateral inferior quadrantanopia

Flashcard 292: Visual images perceived in the temporal hemifield will stimulate cells on the _____ half of the ipsilateral retina (and vice versa)

Answer: nasal

Flashcard 293: What visual field defect results from complete lesion of the optic nerve (e.g. central retinal artery occlusion, central retinal vein occlusion)? _____

Answer: Ipsilateral anopia

Flashcard 294: What visual field defect results from a lesion of the parietal lobe (e.g. MCA infarct)? _____

Answer: Contralateral homonymous inferior quadrantanopia

Flashcard 295: Central scotoma is a visual field defect associated with a lesion to the _____

Answer: macula

Flashcard 296: What visual field defect results from a lesion of the temporal lobe (e.g. MCA infarct)? _____

Answer: Contralateral homonymous superior quadrantanopia

Flashcard 297: A lesion of the **right optic tract** results in what visual field defect? Answer: _____

Answer: Left contralateral homonymous hemianopia

Flashcard 298: What visual field defect results from a lesion of the optic chiasm (e.g. pituitary adenoma, craniopharyngioma)? _____

Answer: Bitemporal hemianopia

Flashcard 299: Monocular anopia is a visual field defect associated with a complete lesion to the _____

Answer: optic nerve

Flashcard 300: Visual images perceived in the nasal hemifield will stimulate cells on the _____ half of the ipsilateral retina (and vice versa)

Answer: temporal