Ocular dominance column

A cortical region whose visual responses preferentially reflect input from one eye. Competitive activity-dependent models can explain segregation of correlated inputs, while anatomical constraints and species differences also matter.

Two eye-specific afferent populations compete under Hebbian learning and synaptic normalization. In a simplified symmetric two-eye model, the eye-difference mode $d_a=w_{aL}-w_{aR}$ evolves with a linear operator containing $K_{ab}(C_{\mathrm{same}}-C_{\mathrm{cross}}{)}_{ab}$. Dominant spatial modes can produce alternating eye preference, while saturation sets finite contrast. The interaction width, arbor constraints and correlation structure influence the column scale. This is a mechanistic hypothesis whose predictions can be tested, not a unique inference from the existence of columns.