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The process of inheritance of trait from parents to their children. This includes molecular structure, genes function, distribution, behaviour and variation. It studies the resemblances and differences in organisms which are related.
A recurrence of a previous medical condition after long periods of dormancy. It also related to drug abuse which is resuming of drug use or chemical substance after periods of abstinence.
A method measuring the extent and level of disability in multiple sclerosis patients. It is also known as the Kurtzke scale, named after the neurologist who developed it.
Term used to describe the electrifying sensation that occurs upon flexion and movement of the neck, which radiates down to the spine, legs, arms and trunk. It can occur as a result of cervical spinal cord injury and vitamin B12 deficiency.
A stage in which neurological symptoms of multiple sclerosis worsens temporarily. It is caused by the body's exposure to increased temperature resulting in nerve impulses blockage. Normalization of the body's temperature causes the signs and symptoms to disappear.
An inflammation of the optic nerve which is a nerve bundle fibre necessary for the transmission of visual information to the brain. This can result to severe pain in the eye and temporary loss of vision.
A term used to describe rapid, involuntary movements of the eyes that are uncontrollable. Eye movements can be horizontal, vertical, and rotational that can occur in one or both eyes depending on the cause.
A medical term for swallowing problems and difficulties. It is a result of damage or inability of muscles and nerves responsible for moving foods through the throat and esophagus to function.
