From Big Medical Encyclopedia

SHTRYUMPELL FENOMENA (A. G. G. Strumpell, is mute. the neuropathologist, 1853 — 1925) — patholologically the strengthened consensual movements (synkineses) which are observed at defeat of pyramidal and extrapyramidal systems.

It is known several pathological synkineses described

by A. Shtryumpell. Their pathophysiological basis is counterinhibition of the segmented device of a spinal cord (see) as a result of elimination of the brake influences of a brain which are carried out through pyramidal system (see) and other descending ways; in nek-ry cases not removal of the braking influences, but dominance of the facilitating (fasili-tiruyushchy) influences of a reticular formation can be an origin of pathological synkineses (see) on structures of a spinal cord.

Tibialny Sh. f. quite often the wedge, a sign of pyramidal and extrapyramidal insufficiency (is the first and only at chronic vascular brain insufficiency, neuroinfection, traumatic and degenerative damages of a brain). It is shown by an involuntary dorsiflexion and supination of foot, and also extension of the I finger at active bending of the affected leg in coxofemoral and knee joints. The research is made in position of the patient lying on spin. In nek-ry cases the tibialny phenomenon is shown completely (or only by extension of the I finger) at free bending of a leg (e.g., legs on the party of the central, pyramidal hemiparesis). However, as a rule, for identification of a tibialny phenomenon investigating shall interfere pressing of a hip of the patient to a bed with bending of a leg. The pathological synkinesis causing a tibialny phenomenon is caused by reflex reduction of a front tibial muscle (m. tibialis ant.).

Pronator Sh. f. it is characterized by increase in pronation of a brush during the bending of a forearm of a hand on the party of a hemiparesis. Owing to a pronator synkinesis the brush during bending of a hand in an elbow joint approaches a shoulder the back. This Sh. f., as well as other synkineses, it is observed at defeat of pyramidal system and it is especially expressed at a hemiparesis (see the Hemiplegia).

Radial (beam) Sh. f also belongs to the synkineses arising in an extremity on the party of a hemiparesis in attempt to make it the active movements. It consists in involuntary extension of a brush at active tightening of fingers in a fist.

A sign of defeat of extrapyramidal system (see) Sh. f serves., to-ry it is shown by involuntary reduction of sgibatel of a hip with reflex bending of a leg in a hip joint at a passive dorsiflexion of foot. The symptom is usually more expressed on the party opposite to the center of defeat.

See also Synkineses.

Bibliography: Bogolepov

of N. K. Xie Miotik and diagnosis of nervous diseases, page 66, M., 1973; G. P Lip. Reference book on a neurologic semiology, page 245, Kiev, 1977; Sh t r yu m p e l And. Diagnosis of the major diseases of a nervous system, the lane with it., Berlin, 1925; Strumpell A. Zur Kenntniss der Sehnenreflexe, Dtsch. Arch. klin. Med., Bd 24, S. 175, 1879; it, Beitrage zur Pathologie des Ruckenmarks, Arch., Psychiat. Nervenkr., Bd 10, S. 676, Bd 11, S. 27, 1880; it, t) ber das Verhal-ten der Haut-und Sehnenreflexe bei Ner-venkranken, Neurol. Zbl., Bd 18, S. 617, 1899; it, Zur Kenntniss der Haut-und Sehnenreflexe bei Nervenkranken, Dtsch. Z. Nervenheilk., Bd 15, S. 254, 1899.

D. K. Bogorodinsky, A. A. Skoromets.