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Genetic and Rare Diseases Information Center (GARD)

Other Names for this Disease
  • GSM 1
  • Hereditary chin tremor/myoclonus
  • Hereditary geniospasm
  • Trembling chin
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How is hereditary geniospasm inherited?

Hereditary geniospasm is inherited in an autosomal dominant manner.[1] This means that having only one mutated copy of the causative gene in each body cell is sufficient to cause signs and symptoms of the condition. When an individual with an autosomal dominant condition has children, each child has a 50% (1 in 2) chance to inherit the mutated copy of the gene and also be affected. Because there is a 50% chance for each child, it is possible for all of the children of an affected individual to be affected, or likewise, for all of the children to be unaffected.
Last updated: 6/5/2013

  1. Hereditary geniospasm. Orphanet. April 2009; Accessed 6/5/2013.