I am a subject of the species Sapiens, genus Homo. Subject is a civilized example of the species. An unfortunate side-effect of being civilized is an encouragement to collect paper, with which subject is to trade for essential goods. The method subject has devised to collect these trade papers involves sitting on a soft yet sturdy apparatus and being bent at an approximately 90-degree angle at the hip and knee joints, and looking at a glowing rectangle while subject taps on a noisy set of squares.<p>Of the unfortunate side-effects of civilization, one is risk of injury. Of the several injuries subject has sustained in this pursuit (including to eyes, fingers, wrists, and elbows) is injury to subject's neck. In particular, a musculoskeletal injury of the muscles supporting the head on the spine, due to repeated stress from looking at a downard angle at glowing rectangle, as opposed to looking straight ahead.<p>This injury did result in up to 11 months of recuperation. During this time period, finding a way to rest the neck and head was extremely difficult and painful. After completing several weeks' worth of paper collection, some attempts were made at recuperation outside in nature. Upon attempting to sleep on the ground, rest was significantly painful and uncomfortable. Thus were attempted many months of trial and error at attempting to find positions with which to rest in a comfortable manner, while allowing the neck to heal.<p>At the end of recuperation, the result of attempts at finding resting positions was quite unexpected. Rest for this subject no longer requires (nor benefits from) pillows when side-sleeping, and back-sleeping is easier, though still not preferable. The explanation for this change appears to be an adaptation in musculoskeletal alignment when sleeping. This subject now acquires a particular alignment of head, neck, spine, shoulder, chest, back, and hips, that keeps any one body part from receiving undue strain. Sleep quality is consistent with sleep quality before injury, with the benefit of no longer needing props to assist in sleep quality.<p>The linked article's conclusion appears to be supported by subject's experience. Subject additionally notes that a single ear is enough to be alerted to most dangers. When sleeping outside, or in an enclosed cabin, such things as mice, deer, and the occasional canid, do tend to wake the subject, as well as odd sounds such as socks falling off the bed onto a plastic bag, or elastic bed sheet end-corners snapping upwards. Whether non-h.sapiens species are also alerted to the latter sounds with one ear open has not been formally evaluated.