Examine each of the pathways below. One of them has the correct order from a sti

Question

Examine each of the pathways below. One of them has the correct order from a stimulus to a response. Which is it?

A. Visual signal -> retina -> optic nerve -> Wernicke's Area -> frontal eye field -> muscle contraction

B. Visual signal -> Optic nerve -> visual association area -> primary visual cortex -> motor neuron -> spinal cord -> muscle contraction

C. Visual signal -> retina-> optic nerve -> primary visual cortex -> visual association area -> primary motor cortex-> spinal cord -> motor neuron -> muscle contraction

D. Visual signal -> Retina -> Optic chiasma -> optic nerve -> multimodal association area -> motor neuron -> muscle contraction

A. Visual signal -> retina -> optic nerve -> Wernicke's Area -> frontal eye field -> muscle contraction

B. Visual signal -> Optic nerve -> visual association area -> primary visual cortex -> motor neuron -> spinal cord -> muscle contraction

C. Visual signal -> retina-> optic nerve -> primary visual cortex -> visual association area -> primary motor cortex-> spinal cord -> motor neuron -> muscle contraction

D. Visual signal -> Retina -> Optic chiasma -> optic nerve -> multimodal association area -> motor neuron -> muscle contraction

Explanation / Answer

C. Visual signal -> retina-> optic nerve -> primary visual cortex -> visual association area -> primary motor cortex-> spinal cord -> motor neuron -> muscle contraction

Retina are the receptors of the visual signal, which are carried to the high regulatory center (visual association area) in through the optic nerve. The impulse is again carried to the muscles of the pupil via the spinal cord.

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