Mechanical Properties of Peripheral Nerves

Millesi, H.; Zöch, G.; Reihsner, R.

doi:10.1097/00003086-199505000-00011

Cited by 118 publications

(135 citation statements)

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“…The mechanisms responsible for the dye spread with mobilization may include fluid movement with intrafascicular gliding, and/or transverse contraction of the nerve as it lengthens. 63 Transverse contraction of the nerve results in an increase in intrafascicular pressure due to changes in volume. 63 During the mobilization technique, the tibial nerve alternately elongated and shortened which may have provided a temporary increase in intraneural pressure followed by a period of relaxation.…”

Section: Discussionmentioning

confidence: 99%

“…63 Transverse contraction of the nerve results in an increase in intrafascicular pressure due to changes in volume. 63 During the mobilization technique, the tibial nerve alternately elongated and shortened which may have provided a temporary increase in intraneural pressure followed by a period of relaxation. Although speculative, it appears that this repetitive or 'pumping' action may have created a flushing of the dye and an alteration of the intraneural pressure as the intraneural fluid was dispersed.…”

Section: Discussionmentioning

confidence: 99%

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The effects of neurodynamic mobilization on fluid dispersion within the tibial nerve at the ankle: an unembalmed cadaveric study

Brown

Gilbert

Brismée

et al. 2011

Journal of Manual & Manipulative Therapy

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Objective: To evaluate the effects of neurodynamic mobilization on the fluid dynamics of the tibial nerve in cadavers. Background: Evidence showing patients benefit from neural mobilization is limited. Mechanisms responsible for changes in patient symptoms are unclear. Methods: Bilateral lower limbs of six unembalmed cadavers (n512) were randomized into matched pairs and dissected to expose the tibial nerve proximal to the ankle. Dye composed of Toulidine blue and plasma was injected into the nerve. The longitudinal dye spread was measured pre-and post-mobilization. The experimental group received the intervention consisting of 30 repetitions of passive ankle range of motion over the course of 1 minute. The matched control limb received no mobilization. Data were analysed using a 262 repeated measures ANOVA with subsequent t-tests for pairwise comparisons. Results: Mean dye spread was 23.8¡10.2 mm, a change of 5.4¡4.7% in the experimental limb as compared to 20.7¡6.0 mm, a change of 21.5¡3.9% in the control limb. The ANOVA was significant (P(0.02) for interaction between group (experimental/control) and time (pre-mobilization/post-mobilization). t-test results were significant between pre-and post-mobilization of the experimental leg (P50.01), and between control and experimental limbs post-mobilization (P(0.02). Conclusion: Passive neural mobilization induces dispersion of intraneural fluid. This may be clinically significant in the presence of intraneural edema found in pathological nerves such as those found in compression syndromes.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The effects of neurodynamic mobilization on fluid dispersion within the tibial nerve at the ankle: an unembalmed cadaveric study

Brown

Gilbert

Brismée

et al. 2011

Journal of Manual & Manipulative Therapy

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“…8 Despite the absence of experimental data, it has been suggested that the nervous system is loaded differently depending on the sequence of joint movement. 6,16 Because the nervous system does not act as a uniform structure along its length, 14,17 these 2 SLR test variations may not impact the nervous system in the same way. It is possible that alterations to the movement sequencing differentially impact the various aspects of nerve biomechanics, including the nerve's ability to glide (excursion) or the extent to which it is stretched (strain).…”

mentioning

confidence: 99%

Impact of Movement Sequencing on Sciatic and Tibial Nerve Strain and Excursion During the Straight Leg Raise Test in Embalmed Cadavers

Boyd¹,

Topp²,

Coppieters³

2013

Journal of Orthopaedic & Sports Physical Therapy

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Study Design Laboratory study, repeated-measures design. Objectives To quantify differences in sciatic and tibial nerve biomechanics (strain and excursion) during common variations of the straight leg raise (SLR) test. Background Hip flexion and ankle dorsiflexion are the primary movement components of the SLR. It has been suggested that the nervous system is loaded differently when ankle dorsiflexion is added before or after hip flexion. There are, however, no data to either support or refute this suggestion. Methods Strain and excursion in the sciatic and tibial nerve were measured in the hip, knee, and ankle regions during 2 movement sequences for the SLR test in 10 embalmed cadavers. The proximal-to-distal sequence consisted of hip flexion followed by ankle dorsiflexion; the distal-to-proximal sequence consisted of ankle dorsiflexion followed by hip flexion. Results In the SLR end position, strain and excursion were comparable for both sequences for the sciatic and tibial nerve at the knee (P>.24). Strain in the tibial nerve at the ankle was greater with the proximal-to-distal sequence (P = .008), but the actual difference was small (0.8%). The pattern of strain increase and nerve excursion varied between sequences (P≤.009), with nerve strain increasing earlier and being maintained longer in regions closest to the joint that was moved first in the movement sequence. Conclusion Varying the movement sequence does not substantially impact excursion and strain in the end position of the SLR. Therefore, if neurodynamic test sequencing is useful in the differential diagnosis of neuropathies, it is not likely due to differences in strain in the end position of testing. J Orthop Sports Phys Ther 2013;43(6):398–403. Epub 30 April 2013. doi:10.2519/jospt.2013.4413

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“…5,7,13,29,30 Lengthening of the nerve bed may also elongate the nerve, which may result in an increase in tension and intraneural pressure. 22 Animal experiments have demonstrated that local nerve inflammation results in increased mechanical sensitivity of otherwise intact axons. 1 When a nerve is inflamed, minimal elongation ( 3%) or locally applied pressure can trigger ectopic impulse generation, 14 which may lead to the provocation of pain and other symptoms.…”

mentioning

confidence: 99%

Different Nerve-Gliding Exercises Induce Different Magnitudes of Median Nerve Longitudinal Excursion: An In Vivo Study Using Dynamic Ultrasound Imaging

Coppieters¹,

Hough²,

Dilley³

2009

J Orthop Sports Phys Ther

133

100

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Mechanical Properties of Peripheral Nerves

Cited by 118 publications

References 0 publications

The effects of neurodynamic mobilization on fluid dispersion within the tibial nerve at the ankle: an unembalmed cadaveric study

The effects of neurodynamic mobilization on fluid dispersion within the tibial nerve at the ankle: an unembalmed cadaveric study

Impact of Movement Sequencing on Sciatic and Tibial Nerve Strain and Excursion During the Straight Leg Raise Test in Embalmed Cadavers

Different Nerve-Gliding Exercises Induce Different Magnitudes of Median Nerve Longitudinal Excursion: An In Vivo Study Using Dynamic Ultrasound Imaging

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