Reid Lab Movies
Cat and Rat Visual Cortex

Plays automatically in Internet Explorer, otherwise click the following link and play in repeat mode: Cat Cortex.avi

Movie of 300 x 300 mm region of cat visual cortex during visual stimulation by drifting bars (indicated in upper right). The neurons are stained with a calcium-sensitive indicator.  Neurons become brighter as they are activated by the visual stimulus.  Neurons on the right half of the image respond best to a stimulus moving down and to the left.  Neurons on the left respond to the opposite direction, up and to the right. Neurons with opposite functions are highly segregated. Time has been sped up 16x. Dark lines are blood vessels.

Plays automatically in Internet Explorer, otherwise click the following link and play in repeat mode: Rat Cortex.avi

Movie of 300 x 300 mm region of rat visual cortex during visual stimulation by drifting bars (indicated in upper right). Neurons are selective for orientation and direction of the stimulus, but they are arranged with no discernible pattern. Each stimulus excites a  sub-population of neurons seemingly at random. (Place mouse over to play).

(K. Ohki, S. Chung, Y. Ch'ng, P. Kara, R.C. Reid).

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