Hip flexor weakness

What it means

Reduced ability to flex the femur, that is, to pull the knee upward.

Hip flexion is mediated by multiple muscles including the iliopsoas, the rectus femoris, the sartorius, and several muscles from the medial compartment of thigh.

Rare diseases that can present with this5

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category