Glossary I-L

  

Idiopathic:

Of unknown cause. Any disease that is of uncertain or unknown origin may be termed idiopathic.

  

Inherited:

Genetic; having to do with information that is passed from parents to offspring through genes in sperm and egg cells.

  

Lower motor neruone:

Located in the brain stem and spinal cord, they are responsible for carrying messages to the muscle fibres.