Did you know you have a sixth sense? No, I’m not talking about ESP. I’m talking about proprioception. Proprioception is the sense of where you are in space. If you close your eyes and I place your right arm in a position out to your side, most people can relatively match that position with their left arm without opening their eyes to look to see exactly where I’ve placed their right arm. This sense of where you are in space helps you control your balance and posture as well. It lets you know if you are fully upright against gravity and helps you maintain yourself upright. In addition, it helps you feel your joint angles and control the alignment of your body in relation to the ground.
I can bend my thumb down so far that it touches my forearm. This is one of the stranger and more visible signs of hypermobility spectrum disorder (HSD) and Hypermobility Ehlers-Danlos Syndrome (EDS-HT). Other signs are hyperextension at the elbows and knees, being able to place your hands flat on the floor when bending forward at the waist while keeping your knees straight, and being able to bend your little finger back past 90 degrees. These are the signs used to diagnose hypermobility, which is simply a laxity or looseness in a person’s ligaments and connective tissue.
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