Patent ID: 7255708

Claim:
A medical chair which is mainly useful for maintaining a relaxed condition of muscular tension of a human body in a condition where physiological curvature of individual vertebrae is realized and human body extends along a direction of gravity, and characterized in that said chair comprises cranium position regulating means and pelvis-and-knee position regulating means for respectively regulating a position of a cranium and a position of a pelvis of a subject who sits on a seat, and said cranium position regulating means and said pelvis-and-knee position regulating means butt against both right and left sides of the cranium and the pelvis, respectively to cause both planes centered in a right-and-left direction of the cranium and the pelvis to be in a same central plane which extends in the direction of gravity, said pelvis-and-knee position regulating means further including knee butting means for butting against the outside of the knees of the subject in a seated condition to cause an angle formed by the knees to be bilaterally symmetrical about the central plane, thereby fixing positions of the knees.