Blockade of Neural Input from the Retina by Tetrodotoxin (TTX)

question 34

Multiple Choice

Blockade of neural input from the retina by tetrodotoxin (TTX) has this developmental effect.

• A) It prevents the formation of the pinwheel patterning in orientation columns.
• B) It releases inhibition of neurons that terminate in layer 4 of the visual cortex.
• C) It leads to excessive "pruning" or dearborization of LGN neurons.
• D) It prevents appropriate structuring and segregation of LGN layers.
• E) It has no effect on visual development.

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