#initial-load-header-loader { visibility: hidden!important; } #initial-load-content { visibility: visible!important; } .expandable .expandable-control { display: none!important; } .expandable .expandable-content { display: block!important; visibility: visible!important; max-height: none!important; height: auto!important; }

hypsarrhythmia

n.

The abnormal and characteristically random electroencephalogram often found in babies with infantile spasms, associated with mental retardation.

Related formshyp′sar•rhyth′moid′ (-moid′) adj.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.