What in the world is a myopathy? I do not know if it is spelled right, but that is what the doctors said I had

I have had a serious brain injusy in the past, it might have to do with that!

NINDS Myopathy Information Page

The myopathies are neuromuscular disorders in which the primary symptom is muscle weakness due to dysfunction of muscle fiber. Other symptoms of myopathy can include include muscle cramps, stiffness, and spasm. Myopathies can be inherited (such as the muscular dystrophies) or acquired (such as common muscle cramps). Myopathies are grouped as follows:
congenital myopathies: characterized by developmental delays in motor skills; skeletal and facial abnormalities are occasionally evident at birth
muscular dystrophies: characterized by progressive weakness in voluntary muscles; sometimes evident at birth
mitochondrial myopathies: caused by genetic abnormalities in mitochondria, cellular structures that control energy; include Kearns-Sayre syndrome, MELAS and MERRF
glycogen storage diseases of muscle: caused by mutations in genes controlling enzymes that metabolize glycogen and glucose (blood sugar); include Pompe's, Andersen's and Cori's diseases
myoglobinurias: caused by disorders in the metabolism of a fuel (myoglobin) necessary for muscle work; include McArdle, Tarui, and DiMauro diseases
dermatomyositis: an inflammatory myopathy of skin and muscle
myositis ossificans: characterized by bone growing in muscle tissue
familial periodic paralysis: characterized by episodes of weakness in the arms and legs
polymyositis, inclusion body myositis, and related myopathies: inflammatory myopathies of skeletal muscle
neuromyotonia: characterized by alternating episodes of twitching and stiffness; and
stiff-man syndrome: characterized by episodes of rigidity and reflex spasms
common muscle cramps and stiffness, and
tetany: characterized by prolonged spasms of the arms and legs

For more info:
http://www.ninds.nih.gov/disorders/myopa...

it is a brain muscle disorder go here and it should help you more
http://www.ninds.nih.gov/disorders/myopa...

The best person to answer your question is your Doctor. Ask him/her to explain whatever he/she tells you that you don't know what it is, or don't understand. You have the right to expect from your Doctor clarification on anything he/she tells you that you have. Besides, it would be a lot safer to get an explanation from your own Doctor. He/she can also direct you to sources for you to research on the subject. All his would be a better way to establish real communication with your Doctor, and educate yourself a lot on health concerns.