PROBLEM TO BE SOLVED: To provide an intention transmitting means that facilitates communication regarding a patient who has difficult in communication due to a serious disorder caused by incurable diseases such as ALS.SOLUTION: A muscular movement sensor for detecting motion of anal sphincter muscle of the patient having difficulty in communication includes: a physical quantity change detector detecting physical quantity changes occurring from the motion of the anal sphincter muscle of the patients intention and a conversion output part converting the physical quantity changes detected by the physical quantity change detector into electric signals and outputting the signals.COPYRIGHT: (C)2012,JPO&INPIT【課題】ALS等の難病に起因する高度の障害によって意思疎通がきわめて困難となっている患者についても簡便な意思伝達手段を提供する。【解決手段】意思表出が困難な患者の肛門括約筋の動きを検出するための筋肉運動センサであって、前記患者の意思による前記肛門括約筋の動きから生じる物理量の変化を検出する物理量変化検出部と、前記物理量変化検出部により検出された物理量変化を電気信号に変換して出力する変換出力部とを備えている。【選択図】図1