Discography is the study and cataloging of published sound recordings, often by specified artists or within identified music genres. The exact information included varies depending on the type and scope of the discography, but a discography entry for a specific recording will often list such details as the names of the artists involved, the time and place of the recording, the title of the piece performed, release dates, chart positions, and sales figures.[1]
A discography can also refer to the recordings catalogue of an individual artist, group, or orchestra. This is distinct from a sessionography, which is a catalogue of recording sessions, rather than a catalogue of the records, in whatever medium, that are made from those recordings. The two are sometimes confused, especially in jazz, as specific release dates for jazz records are often difficult to ascertain, and session dates are substituted as a means of organizing an artist's catalogue.
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Another, more recent, definition of discography refers to a collection of musical recordings by a performer or composer, considered as a body of work. For instance, all studio albums by a performer could collectively be considered their discography.
The term "discography" was popularized in the 1930s by collectors of jazz records, i.e. 'to study and write about the discs of music'. Jazz fans did research and self-published discographies about when jazz records were made and what musicians were on the records, as record companies did not commonly include that information on or with the records at that time. Two early jazz discographies were Rhythm on Record by Hilton Schleman and Hot Discography by Charles Delaunay.[1][3]
The discography of the British girl group Sugababes consists of eight studio albums, four compilation album, four extended plays, thirty one singles (two as featured artists), two video albums and eight promotional singles. The Sugababes were formed in 1998 and, at various times, featured three vocalists from Siobhn Donaghy, Mutya Buena, Keisha Buchanan, Heidi Range, Amelle Berrabah, and Jade Ewen.[1]
In the majority of cases, plain radiographs, spine MRI or spine CT (when MRI cannot be performed) are the primary exams indicated for the diagnostic evaluation of lower back pain. Other tests, such as myelography or discography, are often used in some situations to address specific clinical questions prior to performing surgical procedures.
A lumbar discogram, also called lumbar discography, is a minimally invasive, presurgical diagnostic test devised to determine if an intervertebral disc in the lower spine is the primary cause of back pain with or without leg pain (sciatica). 1 Peh W. Provocative discography: Current status. Biomed Imaging Interv J. 2005;1(1):e2. DOI:10.2349/biij.1.1.e2 Available from:
The results of a discography test influence the surgical decision-making process and accurate selection of spinal levels for a lumbar spinal fusion surgery. 1 Peh W. Provocative discography: Current status. Biomed Imaging Interv J. 2005;1(1):e2. DOI:10.2349/biij.1.1.e2 Available from: The test can also be performed in the neck (cervical discography) or upper back (thoracic discography) to analyze disc-related pain in those spinal segments.
A discogram may be recommended after several attempts of nonsurgical care have failed to provide relief from sciatica or back pain and before surgery is considered. 1 Peh W. Provocative discography: Current status. Biomed Imaging Interv J. 2005;1(1):e2. DOI:10.2349/biij.1.1.e2 Available from: The test may be used to:
The presence of specific conditions or factors may not be favorable in performing a discography due to potential harm to the patient or failure to achieve the desired results. 1 Peh W. Provocative discography: Current status. Biomed Imaging Interv J. 2005;1(1):e2. DOI:10.2349/biij.1.1.e2 Available from: These conditions or factors include but are not limited to:
As with most minimally invasive diagnostic tests, a lumbar discography is usually not performed in women with a suspected or confirmed pregnancy. 1 Peh W. Provocative discography: Current status. Biomed Imaging Interv J. 2005;1(1):e2. DOI:10.2349/biij.1.1.e2 Available from:
A discogram includes disc puncture and pressurization. 3 Guyer RD, Ohnmeiss DD, Vaccaro A. Lumbar discography. The Spine Journal. 2003;3(3):11-27. doi.org/10.1016/s1529-9430(02)00563-6 A contrast agent is injected into the innermost core (nucleus pulposus) of the suspected disc and the resistance encountered during this injection is noted. 1 Peh W. Provocative discography: Current status. Biomed Imaging Interv J. 2005;1(1):e2. DOI:10.2349/biij.1.1.e2 Available from:
Pain provocation during a discogram procedure occurs due to the stretching of the fibers within the disc, pressure on the sciatic nerve roots, and a change in pressure inside the disc. If possible, an adjacent normal disc may be injected as a reference or control to provide an indication of the patient's level of pain tolerance and the reliability of the patient's responses at the suspected disc level(s). 1 Peh W. Provocative discography: Current status. Biomed Imaging Interv J. 2005;1(1):e2. DOI:10.2349/biij.1.1.e2 Available from:
Discography may be regarded as a controversial procedure by some researchers due to the rare probability of long-term side effects and complications. 6 Cuellar JM, Stauff MP, Herzog RJ, Carrino JA, Baker GA, Carragee EJ. Does provocative discography cause clinically important injury to the lumbar intervertebral disc? A 10-year matched cohort study. The Spine Journal. 2016;16(3):273-280. doi.org/10.1016/j.spinee.2015.06.051
The actual mechanism of pain provocation through disc pressurization is not fully understood.1 Despite these barriers, many medical professionals consider discography a valuable tool in the investigation of disc-related pain unresolved by MRI or CT scans and in patients for whom surgery is contemplated. Due to the possibility of potential complications, this diagnostic tool may not be a method of choice for several patients.
Study design: Prospective, match-cohort study of disc degeneration progression over 10 years with and without baseline discography. Objectives. To compare progression of common degenerative findings between lumbar discs injected 10 years earlier with those same disc levels in matched subjects not exposed to discography. Summary of Background Data. Experimental disc puncture in animal and in vivo studies have demonstrated accelerated disc degeneration. Whether intradiscal diagnostic or treatment procedures used in clinical practice causes any damage to the punctured discs over time is currently unknown.
Methods: Seventy-five subjects without serious low back pain illness underwent a protocol MRI and an L3/4, L4/5, and L5/S1 discography examination in 1997. A matched group was enrolled at the same time and underwent the same protocol MRI examination. Subjects were followed for 10 years. At 7 to 10 years after baseline assessment, eligible discography and controlled subjects underwent another protocol MRI examination. MRI graders, blind to group designation, scored both groups for qualitative findings (Pfirrmann grade, herniations, endplate changes, and high intensity zone). Loss of disc height and loss of disc signal were measured by quantitative methods.
Results: Well matched cohorts, including 50 discography subjects and 52 control subjects, were contacted and met eligibility criteria for follow-up evaluation. In all graded or measured parameters, discs that had been exposed to puncture and injection had greater progression of degenerative findings compared to control (noninjected) discs: progression of disc degeneration, 54 discs (35%) in the discography group compared to 21 (14%) in the control group (P = 0.03); 55 new disc herniations in the discography group compared to 22 in the control group (P = 0.0003). New disc herniations were disproportionately found on the side of the anular puncture (P = 0.0006). The quantitative measures of disc height and disc signal also showed significantly greater loss of disc height (P = 0.05) and signal intensity (P = 0.001) in the discography disc compared to the control disc.
Conclusion: Modern discography techniques using small gauge needle and limited pressurization resulted in accelerated disc degeneration, disc herniation, loss of disc height and signal and the development of reactive endplate changes compared to match-controls. Careful consideration of risk and benefit should be used in recommending procedures involving disc injection.
Provocative discography is an invasive diagnostic spine procedure that involves the administration of contrast into the nucleus pulposus of an intervertebral disc to determine if the disc is the origin of a patient's chronic spine pain. The test is based on the premise that an intervertebral disc can be a source of spine pain, that the pain is experienced when the disc is mechanically loaded, and that therefore, similar pain will be experienced when the disc is pressurized with injected contrast. This activity reviews the indications, contraindications, and technique involved in performing provocative discography and highlights the role of the interprofessional team in the care of patients undergoing this procedure.
Objectives:Describe pathophysiology associated with intervertebral disc injury.Describe the classic presentation of discogenic lower back pain.Outline the indications for provocative discography.Explain the importance of collaboration and communication amongst the interprofessional team to ensure the appropriate selection of candidates for provocative discography.Access free multiple choice questions on this topic.
Provocative discography is often done by the orthopedic surgeon or the radiologist. While there are potential shortcomings to its use as a diagnostic tool, PD may still be the ideal test in the following situations. First, when there is more than one abnormal intervertebral disc, particularly when several harbor findings on MRI that beg the question as to which might be the patient's primary pain generator; and second, when the next step in treatment holds the potential for significant morbidity such as with spinal fusion surgery, especially to determine if the disc adjacent to the proposed instrumented segment is painful or disrupted. e24fc04721
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