Final answer:
A temporary loss of consciousness and severe muscle spasms in epilepsy is known as a seizure, which can be controlled with medications but has no known cure.
Step-by-step explanation:
The temporary loss of consciousness accompanied by severe muscle spasms in epilepsy is called a seizure. Epilepsy is a neurological condition characterized by recurrent seizures and is caused by abnormal electrical activity in the brain. Seizures in epilepsy can often be controlled with anticonvulsant medications, but there is no known cure for this disease. While some children may outgrow epilepsy, the cause can sometimes be a combination of genetic and environmental factors, or related to other conditions like brain injuries or infections.