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Jendrassik maneuver effect on spinal and brainstem reflexes

Jendrassik maneuver effect on spinal and brainstem reflexes

Authors :
Kemal S. Türker
Lale A Ertuglu
Eloy Opisso
Hatice Kumru
Serpil Çeçen
Asli Aydin
Josep Valls-Solé
Source :
Experimental Brain Research. 237:3265-3271
Publication Year :
2019
Publisher :
Springer Science and Business Media LLC, 2019.

Abstract

The effect of Jendrassik Maneuver (JM) has been extensively studied on monosynaptic reflexes in numerous muscles below the level at which the maneuver was performed. Here we hypothesize that the effect of JM could be observed also on other reflexes, indicating a widespread influence of performing a motor act such as the JM. We examined polysynaptic reflexes caudal (i.e., the withdrawal reflex of the lower extremities) and rostral (i.e., the blink reflex to supraorbital nerve stimulation) to the level of JM contraction. We have assessed soleus tendon (T) reflex; withdrawal reflex in tibialis anterior and soleus muscle; blink reflex (BR), blink reflex excitability recovery curve (BR-ER) and prepulse inhibition of the blink reflex. Our results showed that (1) T-reflex amplitude increased during JM and decreased just after and 15 min after JM; (2) no change in the withdrawal reflex; (3) R2 area of BR reduced significantly just after or 15 min after JM; (4) Prepulse inhibition in BR reduced significantly during JM; (5) no change in BR-ER. Our results indicate that JM leads to generalized effects on neural excitability at both caudal and rostral levels. Furthermore, JM has a selective effect on excitability of reflex circuitries.

Details

ISSN :
14321106 and 00144819
Volume :
237
Database :
OpenAIRE
Journal :
Experimental Brain Research
Accession number :
edsair.doi.dedup.....f3203af27c416b5fb9ccc08e6b2196f2
Full Text :
https://doi.org/10.1007/s00221-019-05668-y