who suffered a gunshot wound in the posterior brain. The patient reported no impression of movement. He could state the new position of the object (left, right, up, down), but saw "nothing in between". While Goldestein and Gelb believed the patient had damaged the lateral and medial parts of the left occipital lobe, it was later indicated that both occipital lobes were probably affected, due to the bilateral, concentric loss of his visual field. He lost his visual field beyond a 30-degree eccentricity and could not identify visual objects by their proper names. "LM" Most of what is known about akinetopsia was learned from LM, a 43-year-old female admitted into the hospital October 1978 complaining of headache and vertigo. LM was diagnosed with thrombosis of the superior sagittal sinus which resulted in bilateral, symmetrical lesions posterior of the visual cortex. These lesions were verified by PET and MRI in 1994. LM had minimal motion perception that was preserved as perhaps a function of V1, as a function of a "higher" order visual cortical area, or some functional sparing of V5. LM found no effective treatment, so she learned to avoid conditions with multiple visual motion stimuli, i.e. by not looking at or fixating them. She developed very efficient coping strategies to do this and nevertheless lived her life. In addition, she estimated the distance of moving vehicles by means of sound detection in order to continue to cross the street. LM was tested in three areas against a 24-year-old female subject with normal vision: Visual functions other than movement vision LM had no evidence of a color discrimination deficit in either center or periphery of visual fields. Her recognition time for visual objects and words was slightly higher than the control, but not statistically significant. There was no restriction in her visual field and no scotoma. Disturbance of movement vision LM's impression of movement depended on the direction of the movement (horizontal vs vertical), the velocity, and whether she fixated in the center of the motion path or tracked the object with her eyes. Circular light targets were used as stimuli. In studies, LM reported some impression of horizontal movement at a speed of 14 degrees of her predetermined visual field per second (deg/s) while fixating in the middle of the motion path, with difficulty seeing motion both below and above this velocity. When allowed to track the moving spot,