While explaining the somatosensory cortex to a group of nursing students, the instructor asks, "What is involved in the final processing of somatosensory information?" The correct response includes: Select all that apply

Question

A) Full localization
B) Autonomic nervous system
C) Discrimination of intensity
D) Interpretation of somatosensory stimuli
E) Pacinian corpuscle receptors

Answer 1

Ans: A, C, D
Feedback:
The full localization, discrimination of the intensity, and interpretation of the meaning of the stimuli require processing by the somatosensory cortex. The anterolateral pathway gives off numerous branches that travel to the reticular formation of the brain stem; the branches provide the basis for increased wakefulness or awareness after strong somatosensory stimulation and for the generalized startle reaction that occurs with sudden and intense stimuli. They also stimulate the autonomic nervous system. Ruffini end organs are found in the skin and deeper structures and detect tissue vibration, heavy and continuous touch, and pressure. Stretch-sensitive receptors in the skin (i.e., Ruffini endings, Pacinian corpuscles, and Merkel cells) also signal postural information.