About Parkinson's
What is Parkinson's Disease (PD)?
PD is a progressive nervous system disorder that affects how the person moves, including how
they speak and write.
- PD belongs to a group of conditions called movement disorders. Movement disorders
describe a variety of abnormal body movements that have a neurological basis
- Symptoms start gradually, sometimes starting with a barely noticeable tremor in just one
hand. Tremors are common, but the disorder also causes stiffness or slowing of movement
- The muscles of a person with PD become weaker and the individual may assume an unusual
posture
- In PD, certain nerve cells (neurons) in the brain gradually break down or die. Many of
the symptoms are due to loss of neurons that produce a chemical messenger in the brain
called dopamine. When dopamine levels decrease, it causes abnormal brain activity,
leading to symptoms of PD
Causes Of Parkinson's
PD results from degenerative loss of midbrain dopamine neurons in
the Substantia nigra that causes movement problems1.
Genetic2
10% of cases of PD’s disease are primarily due to genetic causes. The most common
genetic effect that triggers PD is mutation in a gene called LRRK2.
Environmental triggers2.
- Significant exposure to pesticides or certain heavy metals.
- Repeated head injuries.
Age3
People usually develop PD around age 60 or older. If someone is diagnosed with PD at
the age 21-50 years, it is referred to as early onset or young onset PD (YOPD).
Sex3
Men are more likely to develop PD than are women.
Problems of Oral Therapy in PD patients
Treatment Related
Failure of an oral dose of levodopa to produce an effect and delay in the onset of action
have been associated with problems in absorption of oral medication in PD patients.
Most patients continue to experience residual OFF time with Oral
dopamine agonists, Monoamine oxidase (MAO) inhibitors, and (COMT) inhibitors, which
causes4,5
- Delayed time-to-ON
- Dose failures
- Suboptimal ON response
Patient Related
More than 80 % of patients with PD develop dysphagia during the course of their
disease4.
Dysfunction of the gastrointestinal tract leads to:
- Problems with absorption of oral PD medication6
- Erratic treatment response
- Silent aspiration, which is one of the key risk factors in developing pneumonia
The issue is further complicated by gut abnormalities, such as
- Small intestinal bacterial overgrowth (SIBO), altered gut microbiota
Stages Of Parkinson's
Mild
Symptoms of Parkinson’s are mild and only seen on one side of the body (unilateral
involvement)
Moderate
Symptoms of Parkinson’s on both sides of the body (bilateral involvement) or at the
midline
Moderate
Symptoms of Parkinson’s are characterized by loss of balance and slowness of
movement
Severe
Symptoms of Parkinson’s are severely disabling
Severe
Symptoms of Parkinson’s are severe and are characterized by inability to rise
Signs and Symptoms
MOTOR SYMPTOMS 7,8
- Tremor: Usually begins in a limb, often the hand or fingers. Patient
may rub thumb and forefinger back-and-forth, known as a pill-rolling tremor. Patient’s
hand may tremor when it's at rest
- Slowed movement (Bradykinesia): Movement may slow down making simple
tasks difficult and time-consuming. Steps may become shorter while walking and it may be
difficult to get out of a chair
- Rigid muscles: The stiff muscles can be painful and limit the range of
motion
- Impaired posture and balance: Posture may become stooped or patient may
have balance problems
- Loss of automatic movements: Patients may have a decreased ability to
perform unconscious movements, including blinking, smiling or swinging arms
- Speech changes: Patient may speak softly, quickly, slur or hesitate
before talking. Speech may become monotonous
- Writing changes: Patient may face difficulty in writing, and the
writing may appear small
NON-MOTOR SYMPTOMS 7,8
- Mood disorders: Such as depression, anxiety and irritability
- Cognitive changes: Such as problems with focused attention and
planning, slowing of thought, language and memory difficulties, personality changes,
dementia
- Orthostatic hypotension: A drop in blood pressure when standing,
light-headedness
- Sleep disorders: Such as insomnia, Excessive Daytime Sleepiness (EDS)
Etc
- Constipation and early satiety: A feeling of fullness after eating
small amounts
- Hallucinations and delusions
- Pain, Fatigue
- Urinary incontinence
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