Publications by authors named "Alicia A Levin"

Objective: The purpose of our study is to present a series of 14 patients with chronic diverticulitis on barium enema examinations and to correlate the radiographic findings with the clinical and pathologic findings in these patients.

Conclusion: Chronic diverticulitis is a distinct pathologic entity characterized by the frequent development of chronic obstructive symptoms and abdominal pain rather than the classic clinical findings of acute sigmoid diverticulitis. Barium enema examinations usually reveal a relatively long segment of circumferential narrowing in the sigmoid colon with a spiculated contour and tapered margins, sometimes associated with retrograde obstruction.

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Human performance on visual texture discrimination tasks improves slowly (over days) in the absence of additional training. This 'slow learning' requires nocturnal sleep after training and is limited to the region of visual space in which training occurred. Here, we tested human subjects four times in one day and found that with repeated, within-day testing, perceptual thresholds actually increased progressively across the four test sessions.

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