Bobby was standing in line to purchase a movie ticket. All of a sudden, the man in front of him took a few steps back and stepped on Bobby's foot. Bobby immediately felt pain in his foot. This sensation was transmitted to the spinal cord and the brain through _____.

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Answer:

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Explanation:

Within an area of the spinal cord called the dorsal horn, the electrical signals are transmitted from one neurone to another across junctions (synapses) by means of chemical messengers (neurotransmitters). Signals are then passed up the spinal cord to the brain. In the brain, the signals pass to the thalamus.

When we feel pain, such as when we touch a hot stove, sensory receptors in our skin send a message via nerve fibres (A-delta fibres and C fibres) to the spinal cord and brainstem and then onto the brain where the sensation of pain is registered, the information is processed and the pain is perceived.

Extra:

Somatosensory neurons (and pain receptors all over the face and head) travel into the central nervous system through the trigeminal nerve.

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