Bing's reflex ( pathological foot extensor reflex ) is a pathological reflex that manifests itself in extension of the first toe of the foot when a needle pricks its back surface. Named after neurologist Paul Robert Bing - professor of neurology at the University of Basel .
Content
- 1 Pathophysiology
- 2 Reflex arc and meaning
- 3 Literature
- 4 See also
- 5 Links
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 arrival of inhibitory impulses to the motor neurons of the spinal cord stops, which is manifested in particular by the appearance of a pathological Bing reflex.
Reflex Arc and Meaning
The reflex arc and the meaning of the Bing reflex are similar to those of the Babinsky reflex (see Babinsky reflex ).
In early childhood, it is physiological and is not a manifestation of the pathology of the central nervous system .
Literature
- Gusev E.I., Konovalov A.N. Burd G.S. Neurology and neurosurgery. - M .: Medicine, 2000 .-- 656 p. - ISBN 5-225-00969-7 .
- Bing PR Ein neues Zeichen organisch bedingter Spastizität: Der paradoxe Fussgelenkreflex. Korrespondenzblatt für Schweizer Ärzte, Basel, volume 15, 1918. (an article which first describes the Bing reflex)
See also
- Pyramid signs
- Babinsky Reflex