Tendon Reflex Asymmetry by Voluntary Mental Effort in Healthy Subjects

Stam, J; Speelman, Hans; Crevel, H. van

doi:10.1001/archneur.1989.00520370072022

Cited by 14 publications

(3 citation statements)

References 16 publications

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“…In healthy subjects mentally induced asymmetry has been observed which may be clinically relevant [74]. Several scales are used to measure muscle tendon reflexes.…”

Section: Reflexesmentioning

confidence: 99%

Sensory neuropathies including painful and toxic neuropathies

Wokke

Dijk

1997

J Neurol

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In most peripheral neuropathies, dysfunction of motor and sensory nerve fibres is present. However, in some of them either pattern may predominate or be exclusively present. In this review we describe the clinical characteristics of sensory neuropathies, with emphasis on their possible causes. Guidelines are given for the diagnostic approach in these patients and, where possible, suggestions are given for treatment, including symptomatic treatment of painful neuropathies.

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“…In healthy subjects mentally induced asymmetry has been observed which may be clinically relevant [74]. Several scales are used to measure muscle tendon reflexes.…”

Section: Reflexesmentioning

confidence: 99%

Sensory neuropathies including painful and toxic neuropathies

Wokke

Dijk

1997

J Neurol

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“…These examination findings may indicate an alternative organic diagnosis but also could have been inaccurate, a consequence of previous problems or may even be consistent with a 'functional' problem. The literature on reflex changes in functional paralysis [1] and in volunteers simulating [13] suggests that asymmetry of the deep tendon reflexes can occur in these situations.…”

Section: Functional Symptomsmentioning

confidence: 99%

Cauda equina syndrome with normal MR imaging

2009

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The aim of this study was to compare the clinical characteristics of patients with and without abnormal MR imaging admitted to a neurosurgical unit with suspected cauda equina syndrome using a retrospective study of consecutive admissions to a regional neurosurgical unit over a 10-month period. Clinical details were obtained from the case notes. A lumbar spine MR scan to investigate possible cauda equina syndrome was performed in 66 patients. There were no significant differences between those with abnormal imaging (n = 34, 52%) and those with a normal scan (n = 32, 48%) in respect of sex, clinical history or features recorded on examination. Those with normal imaging had a high frequency of weakness (n = 18, 59%), saddle numbness (n = 17, 57%), leg numbness (n = 24, 80%), urinary incontinence (n = 13, 54%) and urinary retention (n = 9, 53%). A large number of patients present to neurosurgical units with symptoms suggestive of cauda equina syndrome without any radiological evidence of structural pathology. While some may have had an alternative organic cause, we propose that these symptoms may have a "functional" origin in many patients.

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“…1 Numerous non-neurological variables, however, have been reported to influence the reflex in human beings, including rectus femoris muscle fiber type, physical activity level, femur length, and patient age. [2][3][4][5] Electrodiagnostic techniques have permitted the fractionation of total patellar reflex time into latent (time from tendon tap to muscle action potential) and motor (time from muscle action potential to limb movement) components, allowing more specific localization of impairments related to neurological and nonneurological processes.…”

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confidence: 99%

The Influence of Age on Patellar Reflex Response in the Dog

Levine

Hillman

Erb

et al. 2002

Veterinary Internal Medicne

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The patellar tendon reflex is a clinical parameter commonly used to assess neurological status. Factors such as quadriceps muscle fiber composition, femur length, and patient age have been reported to influence total and fractionated reflex times in human beings. The purpose of this blinded, cross-sectional study was to examine the effect of age on the patellar reflex in the dog. Eighty-six dogs without evidence of neurological impairment or orthopedic disease of the stifle (eg, patellar luxation or cranial cruciate ligament rupture) were assigned to 1 of 2 groups on the basis of age: group 1, <10 years old (n = 72); or group 2, > or =10 years old (n = 14). Patellar reflexes were elicited in both pelvic limbs by a reflex hammer while the dog was in lateral recumbency. The reflex was scored as present or absent by a blinded individual. Two dogs in group I had reflexes absent in both limbs, 3 dogs in group 2 had reflexes absent in both limbs, and 1 dog in group 2 lacked a response in 1 limb. The proportion of dogs with absent patellar reflexes in group 2 (4 of 14, 95% CI, 8-58%) was significantly higher than the proportion of dogs with absent patellar reflexes in group 1 (2 of 72, 95% CI, 0-10%) (P < .006). Furthermore, dogs lacking at least 1 patellar reflex were older than those having both reflexes present (P = .04). Weight was not related to the presence of both reflexes (P = .49). These findings suggest that neurologically normal dogs may have an age-dependent decline in patellar reflex magnitude or a prolongation of total reflex time (TRT).

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Tendon Reflex Asymmetry by Voluntary Mental Effort in Healthy Subjects

Cited by 14 publications

References 16 publications

Sensory neuropathies including painful and toxic neuropathies

Sensory neuropathies including painful and toxic neuropathies

Cauda equina syndrome with normal MR imaging

The Influence of Age on Patellar Reflex Response in the Dog

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