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Texas wins independence from Mexico

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Imagine that you had two populations of red-tailed hawks one with long tail feathers, the other with short tail feathers. Mating discrimination in this species could entail either hawks with long tail feathers preferentially mating with other hawks that have long tail feathers, or hawks with short tail feathers preferentially mating with other hawks that have short tail feathers.

A 77-year-old retired school superintendent comes to your office, complaining of unsteady hands. He says that for past 6 months, when his hands are resting in his lap they shake uncontrollably. He says when he holds them out in front of his body shaking diminishes, and when he uses his hands shaking is also better. He also complains of some difficulty getting up out of his chair & walking around. He denies any recent illnesses or injuries. His PMH is significant for high BP & CAD, requiring a stent. He denies any tobacco, alcohol, or drug use. His mother died of a stroke in her70s & his father died of MI in his 60s. On examination you see a fine, pill-rolling tremor of his left hand. His right shows less movement. His cranial nerve examination is normal. He has some difficulty rising from his chair, his gait is slow, and it takes him time to turn around to walk back toward you. He has almost no "arm swing" with his gait.What type of tremor is he most likely to have?A) Resting tremorB) Postural tremorC) Intention tremor

Du undersöker en pat med misstänkt hö-sidig optikusneurit på din mottagning och använder testet "swinging flashlight". Detta test innebär att man omväxlande lyser på hö och vä öga för att se pupillreaktionerna. Du gör detta ett par gånger och noterar då följande. Vilket/vilka av följande påståenden kan vara sant/sanna om diagnosen är korrekt. [x2] Kliniskt fynd: När du flyttar lampan från det vänstra till det högra ögat:a) Kontraheras högra pupillen, men vänstra förblir orörlig.b) Sker ingen reaktion i högra pupillen, men vänstra drar ihop sig.c) Kontraheras bägge pupillerna snabbt och symmetriskt.d) Förblir bägge pupillerna orörliga.e) Dilateras bägge pupillerna.

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