On-Screen:
Fraden's "ice cube tray eel" comprised of 14 rows and 2 columns. An animated graphic overlay shows the direction of movement of the exhibitory signal down the first column. The signal is represented by a check mark.Text on screen:
The exhibitory signals travel vertically down the column. They activate the chemical reactions beneath them.On Screen:
The graphic overlay shows the inhibitory signal moving from column 1 to column 2 within each row - represented by an x.Text on screen:
The inhibitory signals travel horizontally. They stop the chemical reactions across from them.On Screen:
The exhibitory signal moves down the second column row by row with the inhibitory signal appearing in the corresponding first column cell immediately after. For example, a check appears in row 1, column 2; followed by an x in row 1, column 1; then a check in row 2 column 2, then an x in row 2 column 1, etc. When the last row of a column has been filled, the process starts again from the top of the opposite column. The process continues switching columns back and forth until the end of the video.Text on screen:
The process continues on its own. The next step will be to embed the gel in a tray. As the chemical reactions are activated, the tray will sway from side to side much like the eel's spine curves in one direction and then the other.