PSI Texas State Board Nail Tech practice exam

Which sensation is NOT a message sensation from the sensory nerves?

1. Pain

2. Temperature

3. Touch

4. Involuntary movement

The correct answer is: Involuntary movement

Involuntary movement is not a message sensation from the sensory nerves because it pertains to the actions or responses of muscles rather than sensations perceived by the sensory nervous system. Sensory nerves are responsible for transmitting information about external stimuli, including pain, temperature, and touch, which are all categorized as sensory inputs. Pain is detected through nociceptors, which respond to harmful stimuli. Temperature sensations are transmitted through thermoreceptors, while touch is conveyed by mechanoreceptors that respond to physical deformation. In contrast, involuntary movements are orchestrated by the autonomic nervous system and reflex arcs that control actions without conscious thought, making it distinct from the sensations generated and perceived through sensory nerves.