Load transmission during lumbosacral SMT.

-
Benefits to patients with low back pain from manipulation have been reported. Little is known about how the loads that are applied affect the spine. Studies of isolated forces applied during HVLA (high-velocity and low-amplitude) procedures in controlled conditions reveal force ranges from 20 N to 550 N at rates up to 7101 N/sec. Vertebral motions arising from these forces have been estimated to be up to 0.1 cm and 1.8 degrees.
But complex loads that pass from common lumbar procedures through the spine have not been studied. A group of researchers did an in vivo biomechanical study of three separate manipulation procedures administered in random order. A biomechanical computer model estimated the loads passing through the spine at the level of interest. At last the difference in loading effects from manipulation was contrasted for all six degrees of freedom based on treatment method.
Results showed:
1. Muscular response during the procedures was negligible and did not enter into the estimates of loads transmitted through the spine.
2. There was statistically significant difference found between components load transmission in post-manipulative posture than initial posture (pre-manipulative).
3. Effects on the spine on both sexes ware estimated to be of sufficient strength to sustain them.
4. None of the volunteers who have undergone HVLA experienced any discomfort or complications as a result of the tests.

Comments

Post a Comment

Popular posts from this blog

Entrapment of medial calcaneal nerve (MCN)

-
Image
Peripheral nerve entrapment is a rare, but important, cause of foot and ankle pain that often is underdiagnosed and mistreated. A peripheral nerve may become entrapped anywhere along its course, but certain anatomic locations are characteristic (2). The medial calcaneal nerve (MCN) The Tibial nerve is called the planter nerve in the sole. The tibial nerve passes to the sole of the foot takes a turn on the medial side of the calcaneum is called MCN. The medial calcaneal nerve arises from tibial nerve of the inner side of the ankle, perforates the laciniate ligament, travels downwards passing below the bony projection on the inner side of the ankle, and supplies the skin over the medial aspect of the heel. Hence it is the most important nerve for heel sensations. MCN have 2 branches. The anterior branch dominate the cutaneous sensation of the anterior part of the medial calcaneal and heel weight loading field, while the posterior branch dominate the sensation of the posterior an
Read more

Review of Labral Tears of shoulder

-
Image
The glenoid labrum of the shoulder has extensive anatomic variation but appears to be important for contributing to shoulder stability and for increasing the depth of contact between the glenoid labrum and the humeral head. Tears of the labrum are commonly seen in association with other pathologic entities, such as instability and rotator cuff tears, and treatment of the labral pathology may be incidental to treatment of the other more significant pathology. However, conditions isolated to the labrum do occur and can be a significant source of shoulder problems. Effective treatment of these lesions may result in significant improvement in the patient's symptoms (4). Labral lesions are difficult to diagnose, and special diagnostic studies and, frequently, arthroscopy are required. How much we can rely on clinical tests is a question. Shoulder complaints are frequently recurrent. Instability might cause some of these complaints (3). History taking and clinical tests are commonly used
Read more

Differential diagnosis of Anatomic (Radial) snuffbox pain: It is not always DeQuervain’s tenosynovitis.

-
Image
Tendon, Bone & Ligament causes: 1. DeQuervain’s tenosynovitis: Swelling of tendon of APL (Abductor pollicis longus) & extensor pollicis brevis at lateral wrist near anatomic snuff box.  The primary complaint is radial sided wrist pain that radiates up the forearm with grasping or extension of the thumb. The pain has been described as a “constant aching, burning, pulling sensation." Pain is often aggravated by repetitive lifting, gripping, or twisting motions of the hand. Swelling in the anatomical snuff box, tenderness at the radial styloid process, decreased CMC abduction ROM of the 1st digit, palpable thickening of the extensor sheaths of the 1st dorsal compartment and crepitus of the tendons moving from the extensor sheath may be found upon examination. Other possible findings include weakness and paresthesia in the hand. Finkelstein’s diagnostic test will present positive provoking the patient’s symptoms. If left untreated, the inflammation and progressive narro
Read more