大だい腰よう筋きん

noun

psoas major muscle

Anatomical term for the large muscle running from the lumbar vertebrae to the femur, important for hip flexion and posture.

• 大だい腰よう筋きんは股こ関かん節せつの屈くっ曲きょくに重じゅう要ような筋きん肉にくです。

  The psoas major muscle is important for hip joint flexion.

• 長ちょう時じ間かん座すわっていると大だい腰よう筋きんが硬かたくなりやすい。

  Sitting for long periods tends to make the psoas major muscle tight.