Figure 3 - uploaded by Victoria Hossack
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Drawing of the t-maze and the layout of all the arms. The electrodes were placed at Line B, in either Arm 1 or Arm 2. The planaria were placed in the bottom of the starting arm and allowed to roam free for 5 min. The arms that they visited and the time for them to cross Line C.
Source publication
Some species of fish show highly evolved mechanisms by which they can detect exogenous electric and magnetic fields. The detection of electromagnetic fields has been hypothesized to exist in humans, despite the lack of specialized sensors. In this experiment, planaria were tested in a t-maze with weak electric current pulsed in one arm to determine...
Contexts in source publication
Context 1
... picture of the t-maze used can be seen in Figure 2. It was made from a rectangular plastic dish filled with paraffin wax, which had a "T"-shaped mould. A schematic of the t-maze is found in Figure 3. A pair of electrodes (one positive and one negative) were placed opposite one another on Line B, in either Arm 1 or Arm 2. The electrodes were separated by about 1 cm and were able to conduct electricity to each other through the spring water. ...
Context 2
... planaria were placed, one at a time, in the bottom of the starting arm and allowed to roam freely in the maze for 5 min. The movement of the planaria was recorded for the following measurements: the amount of time it took them to leave the starting arm (cross Line C in Figure 3), which arms in the maze they went into, the amount of time it took for them to cross into each arm (cross either of the Line A's in Figure 3), and the total number of arms they visited. A planaria was considered to have crossed into an arm when its full body had crossed over the line. ...
Context 3
... planaria were placed, one at a time, in the bottom of the starting arm and allowed to roam freely in the maze for 5 min. The movement of the planaria was recorded for the following measurements: the amount of time it took them to leave the starting arm (cross Line C in Figure 3), which arms in the maze they went into, the amount of time it took for them to cross into each arm (cross either of the Line A's in Figure 3), and the total number of arms they visited. A planaria was considered to have crossed into an arm when its full body had crossed over the line. ...
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