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REFLEXES OF DIFFERENT ORDER ELICITABLE FROM THE ABDOMINAL REGION

1925; American Medical Association; Volume: 13; Issue: 6 Linguagem: Inglês

10.1001/archneurpsyc.1925.02200120071006

2330-9628

G. H. MONRAD‐KROHN,

Paleopathology and ancient diseases

In a monograph on the abdominal reflexes, 1 I have pointed out that one cannot regard every reflex contraction of the abdominal wall elicitable from the abdominal region as identical with the normal cutaneous abdominal reflex. First, there is a periosteal reflex of the costal margin, elicitable by percussion of the costal border a little mesiad to the mammillary line. This reflex consists in a contraction of the abdominal muscles—particularly the external oblique—with deviation of the umbilicus toward the point of percussion. This reflex is easily distinguished from the cutaneous abdominal reflex; in the great majority of cases, when the latter is abolished on account of pyramidal lesion, the former is found to be brisk—sometimes even distinctly exaggerated. 2 More difficult to distinguish from the normal abdominal reflex is a reflex which is sometimes encountered in cases in which there can be no doubt that the pyramidal fibers are seriously