scholarly journals The flexor carpi radialis H-reflex in polyneuropathy: relations to conduction velocities of the median nerve and the soleus H-reflex latency.

1987 ◽  
Vol 50 (4) ◽  
pp. 447-452 ◽  
Author(s):  
R J Schimsheimer ◽  
B W Ongerboer de Visser ◽  
B Kemp ◽  
L J Bour
Keyword(s):  
Median Nerve ◽  
H Reflex ◽  
Flexor Carpi Radialis ◽  
Reflex Latency ◽  
Conduction Velocities

scholarly journals H-reflex latency changes after combined application of traction and neural mobilization in cervical radiculopathy

2019 ◽  
Vol 55 (1) ◽  
Author(s):  
Mohammed M. Hegazy ◽  
Ebtessam F. Gomaa ◽  
Salwa F. Abd El Mageed ◽  
Hala R. El Habashy
Keyword(s):  
Median Nerve ◽  
Cervical Radiculopathy ◽  
H Reflex ◽  
Post Treatment ◽  
Cervical Nerve Root ◽  
Simultaneous Application ◽  
Combined Application ◽  
Reflex Latency ◽  
Cervical Traction ◽  
Cervical Disk Herniation

Abstract Background Cervical radiculopathy is a pathology of the cervical nerve root and mostly caused by a cervical disk herniation leading to chronic pain and disability. Objectives This study was conducted to show the effect of the combined application of intermittent cervical traction with median nerve mobilization on flexor carpi radialis (FCR) muscle H-reflex latency of median nerve in patients with unilateral cervical radiculopathy due to disk lesion in a pre-post design. Methods Fifteen patients (10 females and 5 males) with a mean age of 38.07 ± 5.85 years received simultaneous application of intermittent cervical traction and median nerve mobilization. Six sessions were given every other day for 2 weeks. Also, patients perormed chin in exercises and upper back extension with scapular retraction. FCR H-reflex latency was measured pre- and post-treatment. Results Statistical analysis showed that there was a significant reduction of H-reflex latency at post-treatment in comparison to pretreatment (t = 5.447, p value = 0.0001*). Conclusion Simultaneous application of intermittent cervical traction and median nerve mobilization are effective in improving FCR H-reflex latency in patients with unilateral cervical radiculopathy.

Practice Evoking the Flexor Carpi Radialis H-Reflex: A Guideline for Proficiency

2007 ◽  
Vol 104 (1) ◽  
pp. 287-297
Author(s):  
J. Greig Inglis ◽  
Anita D. Christie ◽  
David A. Gabriel
Keyword(s):  
H Reflex ◽  
Flexor Carpi Radialis

Walking Phase Modulates H-Reflex Amplitude in Flexor Carpi Radialis

2013 ◽  
Vol 46 (1) ◽  
pp. 49-57 ◽  
Author(s):  
Antoinette Domingo ◽  
Marc Klimstra ◽  
Tsuyoshi Nakajima ◽  
Tania Lam ◽  
Sandra R. Hundza
Keyword(s):  
H Reflex ◽  
Reflex Amplitude ◽  
Flexor Carpi Radialis

scholarly journals Intensity Sensitive Modulation Effect of Theta Burst Form of Median Nerve Stimulation on the Monosynaptic Spinal Reflex

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Kuei-Lin Yeh ◽  
Po-Yu Fong ◽  
Ying-Zu Huang
Keyword(s):  
Median Nerve ◽  
Amplitude Ratio ◽  
Motor Evoked Potentials ◽  
Short Interval ◽  
H Reflex ◽  
Spinal Reflex ◽  
M Wave ◽  
Therapeutic Benefits ◽  
Median Nerve Stimulation ◽  
Theta Burst

The effects of electrical stimulation of median nerve with a continuous theta burst pattern (EcTBS) on the spinal H-reflex were studied. Different intensities and durations of EcTBS were given to the median nerve to 11 healthy individuals. The amplitude ratio of the H-reflex to maximum M wave (H/M ratio), corticospinal excitability and inhibition measured using motor evoked potentials (MEPs), short-interval intracortical inhibition and facilitation (SICI/ICF), spinal reciprocal inhibition (RI), and postactivation depression (PAD) were measured before and after EcTBS. In result, the H/M ratio was reduced followed by EcTBS at 90% H-reflex threshold, and the effect lasted longer after 1200 pulses than after 600 pulses of EcTBS. In contrast, EcTBS at 110% threshold facilitated the H/M ratio, while at 80% threshold it had no effect. Maximum M wave, MEPs, SICI/ICF, RI, and PAD all remained unchanged after EcTBS. In conclusion, EcTBS produced lasting effects purely on the H-reflex, probably, through effects on postsynaptic plasticity. The effect of EcTBS depends on the intensity and duration of stimulation. EcTBS is beneficial to research on mechanisms of human plasticity. Moreover, its ability to modulate spinal excitability is expected to have therapeutic benefits on neurological disorders involving spinal cord dysfunction.

scholarly journals Neurophysiology of Guillain-Barré syndrome in children

2018 ◽  
Vol 9 (4) ◽  
pp. 50-57
Author(s):  
Vladislav B. Voitenkov ◽  
Natalia V. Skripchenko ◽  
Andrey V. Klimkin ◽  
Stepan G. Grigoriyev
Keyword(s):  
Action Potential ◽  
Median Nerve ◽  
Conduction Velocity ◽  
Peroneal Nerve ◽  
H Reflex ◽  
Guillain Barre Syndrome ◽  
Motor Conduction Velocity ◽  
Early Recovery ◽  
Guillain Barré Syndrome ◽  
Guillain Barré

Our aim was to evaluate sensitivity and specificity of conduction studies parameters for prognosis and differential diag nosis in children with acute motor axonal neuropathy (AMAN) & acute inflammatory demyelinating polyneuropathy (AIDP). Methods. 40 children were included: 20 healthy controls (7-14 years) and 20 patients (8-15 years) with AIDP or AMAN. All underwent conduction studies on 3-7 day since the clinical symptoms onset. We registered and evaluated motor conduction velocity, compound muscle action potential (CMAP) amplitude of nn. tibialis, peroneus, medianus, ulnaris; sensory conduction velocity & sensory nerve action potential (SNAP) amplitude for nn. medianus, suralis, peroneus superficialis, ulnaris, H-reflex threshold & latency, reactivity of neural conductivity (RNC) in short-term hand ischemia in acute phase (3-14 day since the disease onset) and in early recovery period (15-30 day since the symptoms onset). ROC-analysis was performed. Results. In 95% of the patients with Guillain-Barré syndrome H-reflex was absent. In first 10 days SNAP amplitude of median nerve >8.9 µV, peroneal nerve >3.6 µV, CMAP of peroneal nerve ≤0,4 µV with normal motor conduction velocity indicates AMAN presence. Motor axons of peripheral nerves in children in acute and recovery phase of AIDP are resistant towards ischemia. Prognostic criteria for long period of walk recovery (more than 30 days) in these patients are RNC on 10th minute of local ischemia ≤2.5%, ulnar nerve CMAP amplitude ≤1,1 mV and distal CMAP amplitude from median nerve ≤1.6 mV. Conclusions. Conduction studies may be implemented on all phases of Guillain-Barré syndrome in children for prognosis and differential diagnosis between its axonal and demyelinating forms. H-reflex absence in children in the first 5 days of acute polyneuropathy may serve as additional diagnostic criteria for Guillain-Barré syndrome. RNC parameters may be implemented for the prognosis of the walk period recovery duration.

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