nervous breakdown?

Hi
does anyone know what is the difference between a nervous breakdown and depression?i know what is depression but how can i diff.between them?i think im having depression but my psych.says that im just having a nervous breakdown..

[mammo]

This is from The Mayo Clinic, hope it helps.

Question
Nervous breakdown: What does it mean?What does it mean to have a nervous breakdown?
Answer
from Daniel K. Hall-Flavin, M.D.
The term "nervous breakdown" is sometimes used to describe a state in which a person is so severely and persistently distraught that he or she is unable to function at a normal level. Nervous breakdown isn't a medical term, however, nor does it indicate a specific mental illness.

Often, a nervous breakdown indicates depression. Signs and symptoms of depression may include:
Loss of interest in normal daily activities
Agitation or restlessness
Persistent crying
Appetite changes
Sleep disturbances
Trouble concentrating and making decisions
If you're concerned that you're experiencing a nervous breakdown, seek medical attention. If you have a primary care doctor, talk to him or her about your signs and symptoms — or seek help from a mental health provider.

[nilufer23]

Thanx alooot...