Bidirectional cells are a subset of
neuron
A neuron, neurone, or nerve cell is an membrane potential#Cell excitability, electrically excitable cell (biology), cell that communicates with other cells via specialized connections called synapses. The neuron is the main component of nervous ...
s found in
mammalian brains in region
MT. They are characterised by having a peak response to visual motion in two, opposing, directions. They were discovered in 1984 by Albright et al.
References
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Neurons