סקס פיפי סקס שחור לבן

סקס פיפי סקס שחור לבן

For the rat maze, small slides on the underside of the maze platform allow the escape cage and false bottoms to slide in. These are only necessary for the small rodent e. In the case of small rodents e. The wall may not be needed for laboratory mice that are relatively tame. The stand supports the maze platform top such that it is elevated above the floor typically, cm to motivate the rodent to locate the escape cage.

The stand can be constructed of any material. Background noise may be used to block out peripheral acoustic cues that may confound Barnes Maze testing across trials and animals.

Light fixtures and W bulbs encased in aluminum shells. For example, Utilitech W halogen portable work lights. Bright lights provide a mildly aversive stimulus which motivate the rodent to locate the escape cage. Opaque tube rats only 27 cm diameter; 23 cm height with a piece of thick cardboard to cover the top. The tube is placed in the center of the maze and the rat is placed into the tube from the top which is covered with the cardboard. A handle on the outside of the tube allows easier lifting of the tube, which then begins the trial.

The tube can be constructed of any material, but should be opaque. These visual cues orient the animal within the maze environment, providing cues as to the spatial location of the escape cage; in rats, extra-maze cues on the walls work well, whereas in small rodents that require a wall around the maze, intra-maze cues must be used.

A black curtain is used in small rodents especially wild species, e. Peromyscus to maintain attention within the maze confines. After each trial, the maze top and escape cage are cleaned to eliminate potential odor cues for consecutively tested rodents.

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You will only be able to see the first 20 seconds. Morris Water Maze Experiment. Morris Water Maze Test: Optimization for Mouse Strain and Testing Environment. Get cutting-edge science videos from J o VE sent straight to your inbox every month. Those items that are for small rodents only are bolded. Those items that are for large rodents only are italicized. Items neither bolded nor italicized are for both. For rats, each hole is

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