Health encyclopaedia

Health encyclopaedia - Alphabetical Topic List

Causes of Spinal muscular atrophy

Childhood Spinal Muscular Atrophy is an autosomal recessive disease, which means that two defective genes, one from each parent, are necessary to produce disease symptoms. The inheritance is not sex- linked that is, not on an X or Y chromosome. When both parents are carriers, the chance of passing this gene to a child and having an affected child is 1 in 4.

Spinal Muscular Atrophy in the older age group can occur, as mutations or autosomal dominant (requires a genetic defect from only one parent to produce disease symptoms).

Kennedy's disease, arises from a defect in a gene called the androgen receptor gene on the X chromosome.

• SARSScabiesScarlet feverScarsSchizophreniaSciaticaScoliosisScurvySeasonal affective disorderSecond opinionSelf-injurySeptic shockSexual health clinicsSexually transmitted infectionsShinglesShort-sightednessSick building syndromeSickle-cell anaemiaSinusitisSjogren's syndromeSlapped cheek syndromeSleep apnoeaSlipped discSmear testSmoking (quitting)SnoringSore throatSpina bifidaSpinal muscular atrophySports injuriesSprainsSquintStaphylococcal infectionsSterilisationStillbirthStings, insectStings, marine creaturesStreptococcal infectionsStressStretch marksStrokeSubarachnoid haemorrhageSubdural haematomaSudden infant death syndromeSuicideSunburnSupraventricular tachycardiaSyphilis

  ---