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Pain Transmission in the Nervous System Quiz

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Questions and Answers

Which type of nerve fibers lead to sharp, stabbing, local pain?

Unmyelinated small C fibers
Afferent nerve fibers
C fibers
A-delta fibers (correct)

Where do nerve fibers divide in the spinal cord?

Thalamus
Somatosensory cortex
Afferent nerve fibers
Dorsal horn (correct)

Which part of the brain quickly sends a message to the somatosensory cortex where pain is interpreted?

Afferent nerve fibers
Thalamus (correct)
Unmyelinated small C fibers
Dorsal horn

What is the function of nociceptors?

<p>To activate when exposed to noxious stimuli (B)</p> Signup and view all the answers

What is the pain threshold?

<p>The point where a person feels the lowest intensity of painful stimulus (D)</p> Signup and view all the answers

Flashcards

A-delta fibers

Nerve fibers that transmit sharp, stabbing, and localized pain signals.

Dorsal horn

The region within the spinal cord where nerve fibers carrying sensory information divide and process signals.

Thalamus

A brain structure that relays sensory information, including pain, to the somatosensory cortex for interpretation.

Nociceptors

Specialized sensory receptors that are activated by noxious stimuli, initiating the sensation of pain.

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Pain threshold

The minimum intensity of a stimulus that a person perceives as painful.