There is no such thing as "manic defence". Perhaps you meant "manic depression", also called "manic depressive illness", these are considered obsolete terms for what is now called bipolar disorder.
The answer is, its considered both.
It used to be called Manic-Depressive Illness.
Bipolar disorder
Manic depression, or manic depressive disorder is nowadays more commonly known as Bipolar disorder or Bipolar affective disorder. It can also be referred to as Hypomania due to public unawareness.
Other names for bipolar affective disease include manic-depressive disorder, cyclothymia, manic-depressive illness (MDI), and bipolar disorder.
Hypoglycemia and manic-depressive disorder come immediately to mind.
August Hoch has written: 'Benign Stupors' -- subject(s): Manic-depressive illness, Stupor, Psychiatry, Therapy, Manic Disorder, Diagnosis, Catatonia
A mental ailment known as bipolar disorder (formerly known as manic-depressive illness or manic depression) results in unusual swings in mood, energy, activity level, focus, and the capacity to perform daily chores. Bipolar disorder comes in three forms.
A mood disorder characterized by manic highs and depressive lows
David Lovelace has written: 'Scattershot' -- subject(s): Family relationships, Manic-depressive persons, Treatment, Manic-depressive illness, Family, Personal Narratives, Bipolar Disorder
Brian Quinn has written: 'Bipolar disorder' -- subject(s): Bipolar Disorder, Diagnosis, Diagnosis, Differential, Differential Diagnosis, Manic-depressive illness, Therapy
Manic-depression. Bi-Polar Disorder can be difficult for the individual experiencing the symptoms and for their friends and family. Bipolar Disorder is a complex illness and there is a range of severity. There are many different symptoms -- and several different types -- of bipolar disorder. The most common symptoms of the disorder are dramatic and unpredictable mood swings. The various types of bipolar disorder range from mild to severe. If you think that you or someone you know is expereincing symptoms of Bi-polar Disorder then you should reach out to a professional. The symptoms of Bi-Polar Disorder can be treated effectively with counseling and medication.
Bipolar disorder