Motor neurone disease is an uncommon condition that mainly affects people in their 60s and 70s, but it can affect adults of all ages. It's caused by a problem with cells in the brain and nerves called motor neurones. These cells gradually stop working over time.
The condition can affect adults of all ages, including teenagers, although this is extremely rare. It's usually diagnosed in people over 40, but most people with the condition first develop symptoms in their 60s. It affects slightly more men than women.
The causes of MND are unknown, but worldwide research includes studies on: exposure to viruses. exposure to certain toxins and chemicals. genetic factors.
The disease can be classified into four main types depending on the pattern of motor neurone involvement and the part of the body where the symptoms begin.
- Amyotrophic lateral sclerosis (ALS)
- Progressive bulbar palsy (PBP)
- Progressive muscular atrophy (PMA)
- Primary lateral sclerosis (PLS)
Causes. The most common causes of lower motor neuron injuries are trauma to peripheral nerves that serve the axons, and viruses that selectively attack ventral horn cells.
An upper motor neuron lesion is a lesion of the neural pathway above the anterior horn of the spinal cord or motor nuclei of the cranial nerves. A Lower motor neuron lesion is a lesion which affects nerve fibers traveling from the anterior horn of the spinal cord to the associated muscle(s).
Dystonia is a complex disorder of motor control characterized by prolonged muscular contraction that gives rise to abnormal postures and involuntary movements. These are most apparent during voluntary action but may also occur at rest. Dystonia may be focal affecting one part of the body (Fig.
The onset of symptoms varies but most commonly the disease is first recognized between 20 and 40 years of age. Generally, the disease progresses very slowly. Early symptoms may include tremor of outstretched hands, muscle cramps during physical activity, and muscle twitches.
How can MND affect people towards the end of life?
- Respiratory problems.
- Dysphagia (difficulty swallowing)
- Saliva problems.
- Dysarthria.
- Pain.
- Cognitive change.
- Multidisciplinary team working.
Damage to UMNs results in characteristic clinical manifestations colloquially termed “upper motor neuron signs” or “upper motor neuron syndrome.” The symptoms include muscle weakness, spasticity, hyperreflexia, and clonus. Damage to UMNs of the corticobulbar tract can manifest as dysphagia and dysarthria.
Certain dietary factors, such as higher intake of antioxidants and vitamin E, have been shown, at least in some studies, to decrease the risk of MND. Interestingly, increased physical fitness and lower body mass index (BMI) have been shown to be associated with a higher risk of MND.
Overview. Skeletal (striated) muscle contraction is initiated by “lower” motor neurons in the spinal cord and brainstem. The cell bodies of the lower neurons are located in the ventral horn of the spinal cord gray matter and in the motor nuclei of the cranial nerves in the brainstem.
Rigidity of the muscles on passive movement is characteristic of Parkinson's disease but must be distinguished from the rigidity resulting from upper motor neuron lesions, for example, in patients with a stroke.
The upper motor neurons originate in the cerebral cortex and travel down to the brain stem or spinal cord, while the lower motor neurons begin in the spinal cord and go on to innervate muscles and glands throughout the body.
A UMN is confined to the central nervous system (CNS = brain and spinal cord), thus it might help to think of it as a 'central motor neuron. ' An LMN has its cell body in the CNS, but the bulk of the cell (the axon) is in the periphery, thus it might help to think of it as a 'peripheral motor neuron.
Spasticity is increased muscle tone, hyperactive stretch reflexes, and clonus (an oscillatory motor response to muscle stretching). Extensive upper motor neuron lesions may also be accompanied by rigidity of the extensor muscles of the leg and the flexor muscles of the arm (called decerebrate rigidity; see below).
It is clinically difficult or impossible to test muscles of the thorax or abdominal wall, so thoracic spinal cord lesions are primarily detected by the upper motor neuron signs produced, as well as other findings.
To distinguish clinically between a LMN cause and UMN cause of the facial palsy, a patient with forehead sparing (i.e. no involvement to the occipitofrontalis muscle) will have a UMN origin to the palsy, due to the bilateral innervation of the forehead muscle).
Upper motor neuron lesions occur in the brain or the spinal cord as the result of stroke, multiple sclerosis, traumatic brain injury, cerebral palsy, atypical parkinsonisms, multiple system atrophy, and amyotrophic lateral sclerosis.
In Guillain-Barré syndrome, the body's immune system attacks part of the peripheral nervous system. The syndrome can affect the nerves that control muscle movement as well as those that transmit pain, temperature and touch sensations. This can result in muscle weakness and loss of sensation in the legs and/or arms.
Guillain-Barré syndrome can affect anyone. It can strike at any age (although it is more frequent in adults and older people) and both sexes are equally prone to the disorder. GBS is estimated to affect about one person in 100,000 each year.
Guillain-Barré (Ghee-YAN Bah-RAY) syndrome (GBS) is a rare, autoimmune disorder in which a person's own immune system damages the nerves, causing muscle weakness and sometimes paralysis. GBS can cause symptoms that last for a few weeks to several years. Most people recover fully, but some have permanent nerve damage.
What is Guillain-Barré syndrome? Guillain-Barré syndrome (GBS) is also called acute inflammatory demyelinating polyradiculoneuropathy (AIDP). It is a neurological disorder in which the body's immune system attacks the peripheral nervous system, the part of the nervous system outside the brain and spinal cord.
Autonomic dysfunction is a common and severe complication of Guillain-Barré syndrome. Cardiomyopathy, though, is a rare complication in Guillain-Barré syndrome, with only a few cases reported in the literature.
After the first signs and symptoms, the condition tends to progressively worsen for about two weeks. Symptoms reach a plateau within four weeks. Recovery begins, usually lasting six to 12 months, though for some people it could take as long as three years.
Other names for Guillain-Barré syndrome include acute idiopathic polyneuritis, acute idiopathic polyradiculoneuritis and Landry's ascending paralysis.
Recurrent Guillain-Barre Syndrome (RGBS) can recur in 1–6% of patients, though it has been reported to occur in 1–10% of patients after asymptomatic period of several months to several years.
What YOU Can Do
- Get support for yourself. It's important that your help comes from a healthy physical and emotional place.
- Take care of yourself.
- Become familiar with GBS.
- Contact your local GBS/CIDP chapter.
- Be with the patient as much as possible.
- Find a way to communicate.
- Listen.
- Bring 'home' to the hospital.
