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The intradiscal pressure of the human thoracic spine has been poorly investigated. While several previous in vivo and vitro studies determined the intradiscal pressure of the cervical and lumbar spine, the hydrostatic pressure in thoracic intervertebral discs was solely explored in a single in vivo study (Polga et al., 2004). Considerations on the later studies on intradiscal pressures. Studies, from Japan, Sato ( Sato et al., 1999 ) , using a piezoresistive sensor in the transducer needle detecting the pressure laterally at a window and not at the needle tip, confirmed the pioneering findings of Nachemson and examining the changes in the more relevant L4/5 disc rather than the L3/4. Intradiscal pressure under axial compression Axial compression exhibited a strong decrease in the intradiscal pressure from the upper cervical to the upper lumbar region, from where the pressure remained almost constant towards the sacrum (Fig. 3).

Alf nachemson intradiscal pressure

the University of Michigan. The most important in vivo data are from pioneering intradiscal pressure measurements recorded by Nachemson during the 1960s. Since that time, there have been few data to corroborate or dispute This is where researchers measure the intradiscal pressure (pressure on the spinal discs) in response to compressive load. You’re probably familiar with this chart (below) by Nachemson, where he displays how disc pressure changes (increases and/or decreases) depending on body position. The intradiscal lumbar pressure was measured in 10 patients with para- or tetraplegia and in one normal subject.

search:a_search_t: WFRF:Hansson Tommy H. 1943 - SwePub

Next Article A SIMPLE METHOD OF INTRA-ARTERIAL By using a special technique for intradiscal pressure measurements on necropsy material, one of us demon- strated that the nucleus pulposus in a normal and also in a moderately degenerated disc behaves hydrostatically- i.e., the pressure in all but severely degenerated discs is uniformly distributed in the nucleus. 6-8 The relation- ship between applied load per unit of area (p) and nuclear pressure (Pn) has been established. Nachemson A. (1974) Lumbar intradiscal pressure Results from in vitro and in vivo experiments with some clinical implications.

search:a_search_t: WFRF:Hansson Tommy H. 1943 - SwePub

per sq. in.) in the subjects measured. The most reliable results seemed to come from the intradiscal pressure measurements from studies by Nachemson, 1966. A new similar study by Wilke et al.

Nachemson and complemented those earlier data 9 Mar 2007 In many ways, Alf Nachemson helped give birth to the specialty of spine physiologic studies of intradiscal pressure, he became self-taught in 17 Mar 2017 in 1969 by Marianne Zachrisson-Forsell (1980) and Alf Nachemson. 14.2 a, b Intradiscal pressure during lifting with a rounded back (a) Nachemson.
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Since then, Disc pressure measurements in para- and tetraplegic patients. A study of of mobilization and exercise in para- and tetraplegic patients.

In all cases, pressures were highest in the sitting position, about 30 per cent less in the standing position, and about 50 per cent less in … The most important in vivo data are from pioneering intradiscal pressure measurements recorded by Nachemson during the 1960s. Since that time, there have been few data to corroborate or dispute We referred to data from Nachemson and from Sato et al.
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search:a_search_t: WFRF:Hansson Tommy H. 1943 - SwePub

regarding intradiscal pressure and to the methods of Shirazi-Adl for data for other material characteristics (see text for these references). The mid-position model bears a load of 294 N in the vertical direction, while the models of the flexed and extended positions bear loads of 15 N-m. PDF | On Apr 1, 2007, Björn Rydevik and others published Alf Nachemson, MD, PhD, 1931–2006: an exceptional pioneer in spine care | Find, read and cite all the research you need on ResearchGate 1975-08-01 Intravital dynamic pressure measurements in lumbar discs: A study of common movements, maneuvers and exercises, [Nachemson, Alf] on Amazon.com.