Myoclonus: Myoclonus is a movement disorder that causes uncontrollable twitching and jerky movements of arms and legs. It causes sudden muscle spasms which are involuntary and uncontrollable. It might involve one muscle or group of muscles and can occur randomly or in a pattern. Myoclonus is generally a clinical sign of an underlying disease rather than the condition itself. Myoclonic jerks or twitches are caused by sudden muscle contractions, called positive myoclonus or muscle relaxations, called negative myoclonus. Myoclonus is a symptom of neurological disorders which occurs due to disturbance in the brain or spinal cord or due to injury of peripheral nerves.
Vertigo: Vertigo is a sudden external or internal spinning sensation which causes a feeling of being off-balance. Symptoms include dizziness, loss of balance, ringing in the ears, nausea, and vomiting.
Dyslexia: Dyslexia is a learning disorder characterised by reading and learning problems. Symptoms include learning new words slowly, late talking, slow and a delay in learning to read.