- Involuntary arm abduction that follows sustained isometric contraction of the deltoid and supraspinatus muscles (usually performed by pushing the upper extremity forcibly and against an immovable vertical surface while standing closely beside it). SYN: Kohnstamm phenomenon.
* * *af·ter·move·ment (af″tər-mvґmənt) spontaneous elevation of the upper limb by idiomuscular contraction after benumbing it by powerful pressure against a rigid object; called also Kohnstamm phenomenon.
Medical dictionary. 2011.
Look at other dictionaries:
Kohnstamm phenomenon — aftermovement … Medical dictionary
movement — 1. The act of motion; said of the entire body or of one or more of its members or parts. 2. SYN: stool. 3. SYN: defecation. [L. moveo, pp. motus, to move] active m. 1. m. effected by the organism itself, unaided by external influences. 2. in… … Medical dictionary
phenomenon — 1. A symptom; an occurrence of any sort, whether ordinary or extraordinary, in relation to a disease. 2. Any unusual fact or occurrence. [G. phainomenon, fr. phaino, to cause to appear] adhesion p. a p. manifested by the adherence of antigen… … Medical dictionary
Kohnstamm phenomenon — Kohn·stamm phenomenon (kōnґshtahm) [Oskar Felix Kohnstamm, German physician, 1871â€“1917] aftermovement … Medical dictionary