Gluteus Medius

Origin: Outer surface of the ilium from iliac crest and posterior gluteal line above, to anterior gluteal line below, gluteal aponeurosis.

Insertion: Lateral surface of greater trochanter.

Muscle Location - Cranial to where you are palpating the maximus, deeper, more lateral (in the posterior fossa of the ilium), with a broader area of activity and does happen to be particularly tender when working (but you can not rely on tenderness here or at anytime for that matter as other things can mimic this; like L-3 involvement for this area). It is an easy muscle to find and palpate if working for the correction of the AS Ilium. Use your thumbs to palpate this meaty area as the middle and index fingers would fatigue much more readily as you will be palpating more deeply. I don't advise using the thumbs for any other area than the medius, the S-I ligaments and the Gluteus Maximus.

Listing Involvement: The Gluteus Medius is active upon the pelvis when fixated in an AS pattern of misalignment.

Special Instructions: The AS Ilium does not easily lend itself to palpatory analysis as it may mimic other more common misalignments. The erector spinae muscles may appear to be active when upon further inspection they do not maintain a contractile resiliency obvious in the PI ilium. Even the multifidii of the lumbar spine can at first blush seem active upon any (and confusingly all) level/s, but again the muscles do not present with the characteristic consistency of a working muscle. Here experience is essential in order to discriminate between these two subjective palpatory sensations.

Remember don't go looking for this misalignment! Let it find you. Otherwise you will make a hornets nest out of all those PI-ilium spines out there. It only occurs in less than 3% of your patients. It is most often bilateral but will present more obviously to your palpation on one side and then when adjusted, the other. The unadjusted ilium will now become more apparent if it too is AS, now that the other side has been adjusted and you can compare it's non-working muscle to the still acive gluteus on the other side.