What is a common colloquial term used for the somatosensory system?

The term "seat-of-the-pants" sense refers to a pilot's ability to perceive changes in the aircraft’s performance and attitude through sensory input, primarily from the somatosensory system. This colloquial phrase captures the intuitive understanding pilots develop through experience, enabling them to sense how the aircraft is behaving without relying solely on instruments.

The somatosensory system transmits information from the body to the brain about touch, temperature, pain, and proprioception (the sense of body position). When pilots refer to their "seat-of-the-pants" sense, they highlight the importance of physical sensations experienced during flight, such as acceleration or turbulence, which help in controlling the aircraft more effectively. This physical feedback is critical in high-stakes situations, where quick decisions may be necessary without the luxury of instruments.

In contrast, terms like "feel of the ground," "balance," and "touch" may describe aspects of sensory experiences but do not encapsulate the broader and more instinctual aspect of flying associated with the "seat-of-the-pants" term. Each of these alternatives lacks the connotation of intuitive guidance and innate response to situational awareness that is vital for pilots during flight operations.