TY - JOUR T1 - Mechanism of monosynaptic reflex reinforcement during Jendrassik manoeuvre in man. JF - Journal of Neurology, Neurosurgery & Psychiatry JO - J Neurol Neurosurg Psychiatry SP - 40 LP - 44 DO - 10.1136/jnnp.41.1.40 VL - 41 IS - 1 AU - B Bussel AU - C Morin AU - E Pierrot-Deseilligny Y1 - 1978/01/01 UR - http://jnnp.bmj.com/content/41/1/40.abstract N2 - The facilitating effect of the Jendrassik manoeuvre on monosynaptic reflexes in man has been studied by comparing H and T reflexes of the soleus and by blocking the effects of spindle activation by ischaemia of the leg. The Jendrassik manoeuvre equally enhances H and T reflexes provided that the test reflexes are small. The H reflex remains facilitated when the spindle activation cannot affect the soleus alpha-motoneurones--that is, when the Ia afferent nerve fibres from the soleus are blocked by ischaemia. It is concluded that the facilitating effect of the Jendrassik manoeuvre on the alpha-motoneurones is not predominantly routed via the gamma-loop. ER -