DefinitionA focal neurologic deficit is a problem in nerve, spinal cord, or brain function that affects a specific location, such as the left face, right arm, or even a small area such as the tongue.It also refers to any problem with a specific nervous system function such as memory or emotion.The type, location, and severity of the problem can indicate the area of the brain or nervous system that is affected.In contrast, a non-focal problem is NOT specific -- such as a general loss of consciousness.Alternative NamesNeurological deficits - focalConsiderationsA focal neurologic problem can affect any function:Movement changes include paralysis, weakness, loss of muscle control, increased muscle tone, loss of muscle tone, or involuntary movements (such as tremor)Sensation changes include par