PROBLEM TO BE SOLVED: To provide an autonomic nerve function measurement device calculating an index for evaluating an autonomic nerve function by use of a pulse wave capable of being easily measured with a small load.SOLUTION: An autonomic nerve function measurement device calculates an integral value LFPA of a predetermined low frequency region and an integral value HFPA of a predetermined high frequency region of a power spectrum density of the amplitude fluctuation of a pulse wave. The autonomic nerve function measurement device obtains a logarithm of a ratio of the integral value LFPA of the predetermined low frequency region to the integral value HFPA of the predetermined high frequency region, μPA=ln(LFPA/HFPA) as an index of a sympathetic nerve function of a vascular system.COPYRIGHT: (C)2014,JPO&INPIT【課題】 自律神経機能を評価する指標を、簡便に、かつ少ない負担で測定可能な脈波を用いて算出可能な自律神経機能測定装置を提供する。【解決手段】 脈波の振幅変動のパワースペクトル密度のうち、予め定められた低周波領域の積分値LFPAと、予め定められた高周波領域の積分値HFPAとを算出する。そして、予め定められた低周波領域の積分値LFPAと、予め定められた高周波領域の積分値HFPAとの比の対数、μPA=ln(LFPA/HFPA)を、血管系の交感神経機能の指標として求める。【選択図】 図4
