Ankylosing spondylitis - Mendel ( pathological foot flexion reflex ) is a pathological reflex that manifests itself in flexion of the ΙΙ — IV toes of the foot when struck by a neurological hammer on its dorsum. Normally, tapping on the dorsal surface of the foot causes extension of the fingers. This reflex is a manifestation of the pyramidal path and refers to the so-called pyramidal signs .
Named after academician Ankylosing spondylitis and German neurologist Kurt Mendel . First described by Bekhterev at the Congress of Neurologists and Psychiatrists in St. Petersburg in 1901 , publications by Mendel and Ankylosing spondylitis date back to 1904 [1] .
Pathophysiology
It is a manifestation of a lesion of the central motor neuron system, which includes motor neurons of the precentral gyrus of the cerebral cortex , as well as their axons that make up the corticospinal path ( Latin tractus corticospinalis ), which go to the motor neurons of the anterior horns of the spinal cord . Fibers of the corticospinal path conduct inhibitory impulses that prevent the ontogenetically older segmental spinal reflexes . When the central motor neuron system is damaged, the entry of inhibitory impulses to the motor neurons of the spinal cord stops, which is manifested in particular by the appearance of an ankylosing spondylitis - ankylosing spondylitis.
See also
- Rossolimo reflex - a flexion reflex of fingers with a tangent hit on the pads
- Zhukovsky - Kornilov reflex - reflexion of flexion of the toes when hitting the sole with a hammer
Literature
- Gusev E.I., Konovalov A.N. Burd G.S. Neurology and neurosurgery. - M .: Medicine, 2000 .-- 656 p. - ISBN 5-225-00969-7 .
- K. Mendel: Ein Reflex am Fussrücken. Neurologisches Centralblatt, Leipzig, 1904, 23: 197-198, 610.
- WM von Bekhterev: Über einen besonderen Beugereflex - Zehen. Neurologisches Zentralblatt, Leipzig, 1904, 23: 197-198, 609.