The only way to truly confirm that someone has a herniated disc is by an MRI. The old school approach was using a technique called myelogram where they would inject die and watch it on a screen to see if there was a disc injury.
The new MRI and MRAs have such high contrast they are effective with showing everything. Soft tissue, bone, ligaments, tendons, etc. However, MRI’s also are know to miss things as well.
To target the multifidi, you must first know where it is. Anatomically the multifidi consists of a number of fleshy and tendinous fasciculi, which fill up the groove on either side of the spinous processes of the vertebrae, from the sacrum to the axis. The multifidus is a very thin muscle.
As stated previously to target and contract the multifidi properly, the client or patient has to be prone, be educated to “turn on” and isolate the multifidi first before engaging the glutes or hamstrings with the opposite leg exercise. This is done by palpating along lateral to the S.P. just above the Transverse process(TP) and asking and cuing the client to first contract the multifidi then the glutes and hamstrings. This is correct order and technique! This is also based on the literature and research…
You really should look at our human movement course as we go into great detail about this and it will totally open you eyes to understanding the synergisitic interaction with how human movement occurs, how to assess both static and dynamically, how common movement dysfunctions occur and how to train clients’ post therapy based on evidenced based research with practical application.
“Teaching The Scicence Behind The Movement”
“Synergy of Human Movement” level I course