Q: Ganglion neurons project to @. What is the function of this retinal projection? ANS: For controlling saccades, which are fast, darting movements of the eyes Q: Name one neurological sign that a lesion of the encircled structure would produce. ANS: pupillary asymmetry Q: Where do neurons in the nucleus A synapse? ANS: primary visual cortex; area 17 Q: Contrast the retinal origins of axons that are located at A (at the lateral margin of the marked structure) and B (on the midline of the marked structure)? ANS: A. Ipsilateral temporal retina; B. contralateral nasal retina Q: What artery supplies %. What neurological sign is produced if % were completely lesioned? ANS: contralateral visual field blindness (homonymous hemianopsia) Q: Lesion of X would produce what neurological sign? ANS: blindness in one eye (X marks the optic nerve) Q: Approximately what layer of visual cortex is at the tip of the pointer? ANS: 4 (4b, to be precise) Q: Name one target of axons at the tip of the pointer? ANS: primary visual cortex Q: From which layer does the lateral geniculate nucleus receive a projection? ANS: B (A=Layer 1; B=layer 6; C=white matter) Q: What part of visual space is represented at the asterisk? ANS: upper peripheral visual field Q: What visual function is mediated by the circled visual area? Hint: the area is V5 ANS: visual motion perception; helps to guide smooth pursuit eye movements