In which situation would a 'loose end feel' be observed?

A 'loose end feel' is present in situations involving extreme hypermobility. This type of end feel occurs when a joint moves beyond its normal range of motion, and the typical structural limitations provided by ligaments and joint capsule are compromised. In cases of extreme hypermobility, the soft tissue structures are stretched significantly, leading to a lack of tension or firmness at the end of the range of motion. This results in a sensation that feels "loose," lacking the normal resistance one would expect during passive movements.

In contrast, normal joint range of motion would exhibit a more typical end feel, like a firm or soft quality, depending on the specific joint and tissues involved. A complete ligament rupture would often lead to instability rather than a "loose end feel," as the absence of ligaments impacts the overall joint integrity, resulting in an end feel that may be more indicative of a pathologic state. Involuntary muscle spasms would create a "hard end feel" due to the tightness of the muscle rather than a loose sensation, further differentiating it from the loose end feel observed in cases of extreme hypermobility.