In a normally developed histogram, which column would indicate input from the contralateral eye only?

In a normally developed histogram, which column would indicate input from the contralateral eye only?

• A. 1
• B. 2
• C. 4
• D. 7

Answer: (A)

In the primary visual cortex, neurons are organized into ocular dominance columns that reflect which eye drives their responses. Some columns are monocular, responding predominantly to input from just one eye, while others are binocular. A column that receives input exclusively from the contralateral eye is driven only by the opposite eye, because signals from that eye cross to the opposite hemisphere at the optic chiasm and project there. In standard diagrams of ocular dominance organization, the column representing contralateral-eye input-only is depicted as the first column. So the column that would indicate input from the contralateral eye only is the first column.

In the primary visual cortex, neurons are organized into ocular dominance columns that reflect which eye drives their responses. Some columns are monocular, responding predominantly to input from just one eye, while others are binocular. A column that receives input exclusively from the contralateral eye is driven only by the opposite eye, because signals from that eye cross to the opposite hemisphere at the optic chiasm and project there. In standard diagrams of ocular dominance organization, the column representing contralateral-eye input-only is depicted as the first column. So the column that would indicate input from the contralateral eye only is the first column.