My mother had the same problem... trouble walking by herself, leg weakness, and very tired all of the time... alot of sleeping. She is now a diabetic and is on pills for that.
The doctors first thought that she had ALS, then they thought that she had parkinson's disease. At the present time, we still have no actual diagnosis as to what she has. She also has shaky(trembling) hands that bothers her alot.
Your dad's doctors, might want to test him for NPH. That might be what his problem is..... Here's some information for you to read.
Good luck on finding out what's causing your dad's leg weakness.
Risk Factors and Causes
Normal pressure hydrocephalus (NPH) can develop after a stroke, head injury, brain surgery, meningitis, or any disorder that causes bleeding around the brain. The presence of a brain tumor may also cause NPH. In most cases, however, the cause of NPH is unknown.
Signs and Symptoms
In general, a combination of the following symptoms may indicate normal pressure hydrocephalus (NPH):
- Frequent urination or the urgent need to urinate
- Gait disturbance (difficulty walking)
- Mild dementia (a progressive impairment of mental abilities)
Additional symptoms of NPH, such as headache, nausea, and vision problems, can also occur due to the increased pressure on the brain.
The first noticeable symptom of NPH is often a gait disturbance, or having trouble walking or balancing. Commonly, people with NPH may walk with slow, short, shuffling steps and keep a wide stance (for balance) when standing still, or even when walking. People with NPH may also feel as if they cannot lift their foot from the floor. They may feel weak and unsteady in their legs, have a hard time getting started walking, and experience sudden falls.
Signs of dementia often associated with normal pressure hydrocephalus may include having trouble remembering (memory loss), being unusually slow to speak or to understand what is being spoken, having difficulties with tasks that were once routine, and a reduced attention span. The person may also have difficulties with basic reasoning and problem-solving. A general lack of interest in life, as well as changes in behavior and mood, may also accompany NPH.
People in the early stages of NPH may also feel a frequent or urgent need to urinate. Later, as the effects of NPH worsen, these urinary symptoms may progress to incontinence, or the inability to control the flow of urine. In fact, incontinence is often associated with more advanced cases of NPH.