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Biomedical subjects

N Bogduk

Publications and source records attributed to N Bogduk.

At least 127 records · Page 7Linked to original sources
PubMed1981

The nerve supply to the human lumbar intervertebral discs.

The lumbar intervertebral discs are supplied by a variety of nerves. The posterior aspects of the discs and the posterior longitudinal ligament are innervated by the sinuvertebral nerves. The posterolateral aspects of the discs receive branches from adjacent ventral primary rami and from the grey rami communicantes near their junction with the ventral primary rami. The lateral aspects of the discs receive other branches from the rami communicantes. Some rami communicantes cross intervertebral discs and are embedded in the connective tissue of the disc deep to the origin of psoas. Such paradiscal rami are likely to be another source of innervation to the discs. The anterior longitudinal ligament is innervated by recurrent branches of rami communicantes.

Humans↗
PubMed1980

Lumbar dorsal ramus syndrome.

Low back pain, referred pain in the lower limbs, and spasm of the back, gluteal, and hamstring muscles are clinical features which can be induced in normal volunteers by stimulating structures which are innervated by the lumbar dorsal rami. Conversely, they can be relieved in certain patients by selective interruption of conduction along dorsal rami. These facts permit the definition of a lumbar dorsal ramus syndrome, which can be distinguished from the intervertebral disc syndrome and other forms of low back pain. The distinguishing feature is that, in lumbar dorsal ramus syndrome, all the clinical features are exclusively mediated by dorsal rami and do not arise from nerve-root compression. The pathophysiology, pathology, and treatment of this syndrome are described. Recognition of this syndrome, and its treatment with relatively minor procedures, can obviate the need for major surgery which might otherwise be undertaken.

Animals↗
PubMed1980

'Rhizolysis'.

Explore the source record for details and available documents.

Back Pain↗
PubMed1980

The dorsal lumbar muscles of the cat.

Observations made in the present study of the dorsal lumbar muscles of the cat are at variance with descriptions in the available literature. The morphology of these muscles is described in detail, and a revised interpretation of this morphology is made. There are 5 muscles -- multifidus, intertransversarii mediales, lumbococcygeus, iliocostalis lumborum and longissimus lumborum. They are arranged in 5 parallel polysegmental columns and are covered by the dorsal layer of thoracolumbar fascia and the erector spinae aponeurosis. The multifidus consists of fibres connecting mamillary and spinous processes. From each mamillary process 4 sets of fasciculi arise. Each set has constant specific attachments. The intertransversarii mediales are fibres connecting accessory and mamillary process. 3 principal fasciculi arise from each accessory process and insert into particular mamillary processes at more caudal levels. The iliocostalis and longissimus arise from the ilium and from opposite surfaces of an intermuscular septum. The lumbococcygeus arises in the lumbar region from the accessory processes but inserts in the tail. Reasons for the revised nomenclature and interpretation are discussed. A specific definition of the longissimus lumborum and iliocostalis lumborum is made on the basis of their observed morphology and nerve supply. It is argued that the lumbococcygeus should be considered as the lumbar portion of sacrocaudalis dorsalis lateralis rather than part of a common muscle mass.

Animals↗
PubMed1980

A reappraisal of the anatomy of the human lumbar erector spinae.

In the lumbar region the longissimus thoracis and iliocostalis lumborum are separated by the erector spinae aponeurosis and its ventral reflection--the lumbar intermuscular aponeurosis. Lumbar fibres of the longissimus arise from the ilium and the lumbar intermuscular aponeurosis and insert into the accessory processes and proximal ends of the transverse processes of the lumbar vertebrae. Lumbar fibres of iliocostalis insert into the costal elements of the first four lumbar vertebrae. The lumbar insertions of these muscles are homologous to their thoracic insertions. The lumbar intermuscular aponeurosis is homologous to the lumbar intermuscular septum in the dog, cat and monkey. The details of attachment of the lumbar fibres of the erector spinae and of the lumbar intermuscular aponeurosis should be taken into account in biomechanical analyses of the lumbar vertebral column.

Adult↗
PubMed1979

The anatomy of the so-called "articular nerves" and their relationship to facet denervation in the treatment of low-back pain.

Disections of the dorsal rami of L1--5 were performed in human cadavers, and the course of the dorsal rami, their branches, and the innervation of the zygapophyseal joints in the lumbar region were specifically studied. At the L-1 through L-4 levels, the dorsal rami divide into medial and lateral branches within the intertransverse ligaments. Each medial branch runs across the root of the adjacent superior articular process. At the caudal edge of the process, the branch turns medially beneath the mammillo-accessory ligament. Beneath the mammillo-accessory ligament, medial branches occur that innervate the adjacent zygapophyseal joint, and distal zygapophyseal branches arise at the laminar level to innervate the next lower joint. The L-5 dorsal ramus runs along a groove between the ala of the sacrum and its superior articular process. A the caudal edge of the articular process, the ramus divides into medial and lateral branches, and the medial branch supplies the L5--S1 articulation.

Back Pain↗
PubMed1977

An anatomical assessment of the "percutaneous rhizolysis" procedure.

The procedure known as rhizolysis has been claimed to denervate the lumbar zygapophyseal joints. Analysis of the surgical anatomy of the incisions used in the procedure reveals that theoretically they do not interrupt the nerve supply to the zygapophyseal joints. The procedure was performed at six levels in each of three cadavers. Subsequent dissection revealed that at no level was the nerve supply to the zygapophyseal joints interrupted. The writers conclude that denervation of the Zygapophyseal joints cannot be held to be the mechanism of any pain relief that rhizolysis may achieve.

Back Pain↗
PubMed1976

The anatomy of the lumbar intervertebral disc syndrome.

Four elements of the nervous system may be involved in the production of the lumbar intervertebral disc syndrome. These are the lumbosacral nerve roots, the spinal nerves, the dorsal rami and the sinuvertebral nerves. Each nerve is associated with a particular group of pathological conditions which may irritate the nerve and produce symptoms. The anatomy of each nerve determines which particular conditions may irritate it. Moreover, one or both of two mechanisms may be involved in symptom production. The type of nerve irritated determines which mechanism is involved. In the first mechanism, low back pain and referred lower limb symptoms are produced when afferent fibres from dorsal and ventral rami are stimulated where they pass in common through spinal nerves or nerve roots. In the second mechanism, dorsal rami or sinuvertebral nerves are stimulated. This directly produces low back pain, but referred pain is produced by reflex mechanisms in the spinal cord.

Back Pain↗
PubMed1976

The lumbosacral dorsal rami of the cat.

The lumbosacral dorsal rami of the cat were studied by gross dissection. The L1-6 dorsal rami form three discrete branches - lateral, intermediate and medial. The lateral branches supply the iliocostalis lumborum and become cutaneous over the back. The intermediate branches ramify in the longissimus lumborum, and are separated from the lateral branches by the lumbar intermuscular septum. The medial branches supply the multifidus and have a constant branch - the nerve to intertransversarii mediales. The L7 dorsal ramus forms only medial and intermediate branches. The S1 and S2 dorsal rami form three branches, the middle of which form the ascending sacral trunk and accessory ascending sacral trunk. The ascending sacral trunk is derived from S1 and S2, the accessory ascending sacral trunk from S2. Both nerves are the exclusive nerve supply of lumbococcygeus.

Animals↗
PubMedDate not supplied

Percutaneous lumbar medial branch neurotomy: a modification of facet denervation.

Percutaneous lumbar medial branch neurotomy is a technique for facet denervation in which the target is specifically the medial branch of the dorsal ramus. The radiology of the technique is illustrated, and the technical aspects of the procedure are described. The accuracy of previous techniques for facet denervation as compared with medial branch neurotomy is reviewed in a comparative analysis of radiographs illustrating the various techniques. It is suggested that the greater accuracy of medial branch neurotomy will permit a more adequate trial of the rationale and efficacy of facet denervation.

Adult↗