Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “REFLEX, ABNORMAL”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 631 records · Page 35Linked to original sources
PubMed1979

[Spinal mechanisms of movement disorders in torsion dystonia (electromyographic analysis)].

A clinico-electromyographical study of 25 patients with torsion dystonia was carried out. The author studied evoked responses of the muscles of the lower extremities (H-reflex, M-response, F-wave) during the electric stimulation of the tibial nerve and the general electric muscular activity both at rest and in hyperkinesia. Two types of changes in the electromyographic data were revealed in the examined patients. It is suggested that there are certain differences in the neurophysiological mechanisms of motor disturbances in torsion dystonia. The role of the spinal apparatus in the development of dystonic hyperkinesia is considered.

Adolescent↗
PubMed1979

Observations on the knee-jerk reflex in oxygen-helium at 31 and 43 bars.

Sensitivity of the knee-jerk reflex was measured in three men during two experimental saturation dives, a fast compression dive to 300 msw and a slow compression dive to 420 msw. In all cases, the force produced at the ankle by the reflex (isometric) contraction was augmented after compression. The most marked increases were observed during the shallower but faster compression dive. During decompression, reflex sensitivity remained enhanced during the 300-m dive but returned to control levels during the 420-m dive. Furthermore, the usual facilitatory effects of Jendrassik's maneuver were abolished during the 300-m dive. Peripheral nerve conduction velocity and synaptic delay apparently remained unaffected. The conclusion that the observed hyper-reflexivity results from supra-spinal influence on alpha-motor-neuron excitability and possibly on gamma-efferent activity is discussed in relation to other reflex studies in hyperbaric O2-He and O2-N2 environments.

Adult↗