. Archives of physical medicine and rehabilitation . Incervical region. reported a case of acute sprain of thespine followed by retention of , in 1 920, reviewed the litera-ture and discussed the condition. Henoted the occasional difficulty in thediagnosis of the occult variety. He dis-cussed fully the various theories of thecause of this disease and concludedthat it could not be explained on thebasis of any single factor, but on one ormore of the following: (1) abnormalcharacter of the gametes, (2) mechani-cal, chemical, or physico-chemical fac-tors influencing the embryonic rudi
. Archives of physical medicine and rehabilitation . Incervical region. reported a case of acute sprain of thespine followed by retention of , in 1 920, reviewed the litera-ture and discussed the condition. Henoted the occasional difficulty in thediagnosis of the occult variety. He dis-cussed fully the various theories of thecause of this disease and concludedthat it could not be explained on thebasis of any single factor, but on one ormore of the following: (1) abnormalcharacter of the gametes, (2) mechani-cal, chemical, or physico-chemical fac-tors influencing the embryonic rudi-ments, either before or after differen-tiation. He pointed out the roentgenolo-gists tendency to disregard the finding,and discussed the associated signs andsymptoms. A series of reflex disturb-ances, faulty contour or slight asym-metry of development of the calves orbuttocks, and deformities of the footand toe often may be explained byspina bifida occulta. Hypertrichiasisis only infrequently associated; sacraldimple, persisting after 12 years of. Fig. 14 (A268500). Congenital defect in thethird and fourth thoracic vertebra with nosigns or symptoms. Pig. 15 (A316979). Spina bifida inthe thoracic vertebra. Pig. 16 (A240447). Spina bifidapresenting signs and symptoms. 359 DEVELOPMENTAL ANOMALIES OF THE SPLNE—SUTHERLAND
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