Question

Which of the following outcomes would you expect from monocular deprivation?

a) After monocular deprivation disrupting input from the right eye at 2 weeks old, there would be a large expansion of the regions that receive input from both eyes in layer iii of the primary visual cortex.
b) After monocular deprivation disrupting input from the right eye at 20 weeks old, there would be roughly equal strips/columns of neurons in layer iv of the primary visual cortex that receive input from only the right eye or only the left eye.
c) Monocular deprivation disrupting input from the right eye at 2 weeks old would likely not affect input segregation in the lateral geniculate nucleus (LGN).
d) Monocular deprivation disrupting input from the right eye at 20 weeks old would minimally affect the number of neurons receiving input from both eyes in layer iii of the primary visual cortex.

Answer 1

Monocular deprivation can lead to different outcomes depending on the timing. At 2 weeks old, there is a large expansion of regions receiving input from both eyes, while at 20 weeks old, there are roughly equal strips/columns of neurons that receive input from only one eye. Monocular deprivation does not affect input segregation in the LGN at 2 weeks old and has minimal impact on the number of neurons receiving input from both eyes at 20 weeks old.

Step-by-step explanation:

Monocular deprivation refers to the condition where one eye is deprived of sensory input during a critical period of visual development. The outcomes of monocular deprivation can differ depending on the timing of the deprivation.

a) After monocular deprivation disrupting input from the right eye at 2 weeks old, there would be a large expansion of the regions that receive input from both eyes in layer iii of the primary visual cortex.

b) After monocular deprivation disrupting input from the right eye at 20 weeks old, there would be roughly equal strips/columns of neurons in layer iv of the primary visual cortex that receive input from only the right eye or only the left eye.

c) Monocular deprivation disrupting input from the right eye at 2 weeks old would likely not affect input segregation in the lateral geniculate nucleus (LGN).

d) Monocular deprivation disrupting input from the right eye at 20 weeks old would minimally affect the number of neurons receiving input from both eyes in layer iii of the primary visual cortex.