試題詳解

7. Which one of the following statements is wrong?
(A) The spinal dorsal horn receives input from a wide variety of primary afferent axons, including nociceptors, which respond to tissue-damaging stimuli from the skin, muscles, joints, and viscera.
(B) The patterns of termination of primary afferents within the spinal cord are related to axonal diameter and receptive field modality.
(C) Most nociceptive primary afferents have slowly conducting fine myelinated or unmyelinated axons, and they terminate mainly in the deep part of the dorsal horn.
(D) Primary afferents release a variety of chemical mediators and on entering the dorsal horn they form excitatory synapses with neurons located within it.