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20 January, 10:14

How does the input of olfactory information to the brain differ from other sensory input pathways?

a. it does not require the cortex for higher order processing.

b. direct connections to the thalamus are not made before information reaches the cortex.

c. the first direct connection is to the thalamus and not to the medulla.

d. prior to making connections with the medulla, sensory input travels through the spinal cord?

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  1. 20 January, 12:38
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    The correct option is B.

    The information from the olfactory cells has to reach the cortex before they are transferred to the thalamus. When an odor molecule binds to a receptor, it start an electrical signal, which travel from the sensory neuron to the olfactory bulb. The olfactory bulb relays the signal to the appropriate part of the brain for further processing.
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