And an attempt to make the head of a patient comfortably and unshakably rested on the headrest is realized by forming a center recess in the interior member of the main headrest of a cushionlike mass of soft material and also forming raised portions on the left and right of the recess and additionally curving the end sides of {HEAD ~ neck sides} of {TAIL ~ the headrest base rearwards} 
And an attempt to make the head of a patient comfortably and unshakably rested on the headrest is realized by forming a center recess in the interior member of the main headrest of a cushionlike mass of soft material and also forming raised portions on the left and right of the recess and additionally curving the end sides of { HEAD ~ neck sides } of { TAIL ~ the headrest base rearwards }
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