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|Logan Basic Technique contacts. Note that the thumb contact is on the sacrotuberous ligament on the involved side, applying six to eight ounces of pressure. Also note that “ceiling” is utilized in this contact.
History of the Technique
The Logan Basic Technique was created by Dr. Hugh B. Logan in 1931. A Palmer graduate, Dr. Logan received primarily upper cervical adjustments for his sciatica problem. After battling with sciatica intermittently for 10 years, Dr. Logan was not satisfied with the insignificant symptomatic relief he was experiencing at the time. In his desire to improve his understanding of the spine, and due to his recurring sciatica, Dr. Logan took a leave of absence from practice, and committed himself to understanding the biomechanics of the lumbo-sacral region. During this time, Dr. Logan formulated what he termed “Primary Premise,” which, according to him, showed that the “lowest freely moveable vertebrae always rotates toward the side of the low sacrum, or the foundation upon which it rests. It also rotates toward the high iliac crest, when that crest is high as a result of sacral subluxations.”1 This led Dr. Logan away from adjusting the upper cervical area, to focusing on the pelvic region. The premise was to use the sacrotuberous ligament as a contact to correct for an anterior inferior (AI) sacrum, thereby restoring the foundation of the spine. Once the foundation of the spine was restored, the rest of the spine would follow.
Before we begin, let us assume that a proper examination has been performed, and that no contraindications are present.
Step One – Analysis for determining side of the subluxation
- Palpate the heights of the iliac crest. The iliac crest will be higher on the lesion side, which is the side of the AI sacrum.
- Palpate the erector spinae muscles. An increase in tension will be present on the lesion side.
- Palpate rotation of the lowest freely movable lumbar segment. This segment will rotate toward the side of the AI sacrum.
- Determine the side of pain in the SI joints. The AI sacrum will produce pain upon palpation.
- Determine which sacrotuberous ligament contact you will be using. The sacrotuberous contact is on the ipsilateral side of the AI sacrum.
|Photo 2: The sacrotuberous ligament contact, as well as the scanning hand’s contacts on the spinous processes are displayed. The scanning hand continues cephalad up the spinous processes once each area is palpated to be relaxed.
(See photos 1 and 2)
- Patient: prone
- Doctor: seated at side of table, contralateral to the contact point.
- Contact: thumb pad contact under the sacrotuberous ligament, ipsilateral to the AI sacrum. (Note: The contact is located at the medial aspect of the caudad edge of the sacrotuberous ligament.)
- When contact is made, the doctor is looking for three things to occur:
- pulsation on the thumb pad
- relaxation of the lumbar musculature
- shallow breathing
- Scanning hand (auxiliary contacts): index, middle and ring fingers of the superior hand, contact the L5, L4, and L3 spinous processes. Once a relaxation of the area is palpated, the doctor will relocate these fingers to the next three cephalad spinous processes.
- The doctor will repeat this process, until the scanning hand reaches the atlas. At this point, the scanning hand’s index finger and thumb pad will contact the posterior aspect of the transverse processes of atlas.
- Line of correction (LOC) for the contact hand: M-L, S-I. Six to eight ounces of pressure. Be sure to implement “ceiling” into your line of correction.
- “ceiling” represents directing your contact upwards toward the ceiling, to ensure that you are underneath the sacrotuberous ligament.
|Photo 3: Scanning hand on the posterior aspect of the atlas TVPs. A pulsation will be palpated at both the atlas contact and the sacrotuberous contact.|
|Photo 4: Bilateral atlas contact is replaced with a unilateral contact, ipsilateral to the sacrotuberous ligament contact.
|Photo 5: Once the unilateral atlas contact is removed, increase the sacrotuberous ligament pressure to 10 to 12 ounces, and release the contact upon patient exhalation.
(See photos 3, 4 and 5)
- While on the atlas contact with the scanning hand, a pulse will eventually be palpated.
- Therefore, the doctor will palpate a pulsation at both the atlas and the sacrotuberous contacts simultaneously.
- This pulsation is defined as the cranial-rhythmic impulse, which is cerebral spinal fluid pulsating from the sacrum to the occiput.
- Once pulsations on both contacts are palpated, the doctor will change his scanning hand’s bilateral contact on the atlas, to a unilateral atlas contact on the ipsilateral side of the sacrotuberous contact.
- The doctor will then remove the remaining contact from the atlas, and will “set” the sacrotuberous contact by increasing the pressure to 10 to12 ounces, and releasing the contact during an exhalation from the patient.
- The adjustment is now completed.
Until next time… Adjust with Confidence! •
- Logan, H.B. et al. Textbook of Logan Basic Methods. 4th Edition. 2006. LBM Inc. Chesterfield, Mo.
Dr. John Minardi is a 2001 graduate of Canadian Memorial Chiropractic College. A Thompson-certified practitioner and instructor, he is the creator of the Thompson Technique Seminar Series and author of The Complete Thompson Textbook –