Hall: Guyton and Hall Textbook of Medical Physiology, 12th Edition
Chapter 48: Somatic Sensations: II. Pain, Headache, and Thermal Sensations
Test Bank
1. The neospinothalamic tract:
A. Transmits vibration sense
B. Transmits proprioceptive information
C. Transmits fast pain impulses
D. Transmits slow pain impulses
2. Stimulation of neurons in the nucleus raphe magnus:
A. Can inhibit pain fibers at the level of the spinal cord
B. Results in the activation of the periventricular region
C. Results in the direct release of enkephalin from the raphe magnus neurons
D. Both A and C are correct
3. Stimulation of which brain area can modulate the sensation of pain?
A. The superior olivary complex
B. The locus coeruleus
C. The periaqueductal gray
D. The amygdala
4. Which of the following sensory modalities uses unmyelinated fibers to convey
information to the central nervous system?
A. Proprioception
B. Vision
C. Vibration
D. Pain
5. Neurons located in which of the following areas release serotonin as their
neurotransmitter?
A. The periaqueductal gray area
B. The interneurons of the spinal cord
C. The periventricular area
D. The nucleus raphe magnus
Test Bank
48-2
6. Which of the following is paired correctly?
A. Dorsal column system – pain and temperature sensation
B. Layers I and II of somatosensory cortex – incoming signals from the thalamus
C. Free nerve ending – type C fiber
D. Large representation on post central gyrus – the foot
7. The highest degree of pain localization comes from:
A. Simultaneous stimulation of free nerve endings and tactile fibers
B. Stimulation of free nerve endings by bradykinin
C. Nerve fibers traveling to the thalamus by way of the paleospinothalamic tract
D. Stimulation of type A fibers
8. Which of the following are paired correctly?
A. Nucleus raphe magnus – -endorphin
B. Periaqueductal gray – serotonin
C. Enkephalin – presynaptic inhibition of type A fibers
D. Intracranial headache – eye strain
9. Massaging the skin or application of an irritant to the skin can suppress the transmission
of pain signals from the corresponding body area by suppressing the sensory fibers
transmitting the pain signal. Which of the following best describes this phenomenon?
A. Release of enkephalin from local neurons in the spinal cord
B. Pre- and post-synaptic inhibition of type C fibers by serotonin
C. Lateral inhibition of pain fibers by tactile fibers from adjacent skin areas
D. Activation of periaqueductal gray neurons
10. The “paleospinothalamic tract”:
A. Contains type A nerve fibers
B. Terminates exclusively in the thalamus
C. Transmits the “fast pain” sensation
D. Terminates predominantly in the lower brain regions
11. Which substance is responsible for activating pain receptors?
A. GABA
Test Bank
48-3
B. Serotonin
C. Bradykinin
D. -endorphin