Upper motor neuron lesion: Difference between revisions
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{{Infobox_Disease | | {{Infobox_Disease| | ||
Name = {{PAGENAME}} | | Name = {{PAGENAME}} | | ||
Image = Gray764.png | | Image = Gray764.png | | ||
Caption = The motor tract. | | Caption = The motor tract. | | ||
}} | }} | ||
{{SI}} | {{SI}} | ||
{{CMG}} | {{CMG}} {{AE}} {{CZ}} {{LRO}} | ||
==Overview== | |||
An '''upper motor neuron lesion''' is a lesion of the neural pathway above the [[anterior horn]] cell or motor nuclei of the [[cranial nerves]]. This is in contrast to a [[lower motor neuron lesion]], which affects nerve fibers traveling from the anterior horn of the [[spinal cord]] to the relevant muscle(s). | |||
==Causes== | |||
<div style="-webkit-user-select: none;"> | |||
===Life Threatening Causes=== | |||
*[[Cerebral palsy]] | |||
*[[Cerebrovascular accident]] | |||
*[[Cervical myelopathy]] | |||
*[[Multiple sclerosis]] | |||
*[[Spinal cord injury]] | |||
*[[Stroke ]] | |||
*[[Traumatic brain injury]] | |||
===Common Causes=== | |||
*[[Cerebral palsy]], | |||
*[[Cerebrovascular accident]], | |||
*[[Cervical myelopathy]], | |||
*[[Cervical spondylosis]], | |||
*[[Friedreich ataxia]], | |||
*[[Juvenile primary lateral sclerosis]], | |||
*[[Konzo]], | |||
*[[Motor neuron disease]], | |||
*[[Multiple sclerosis]], | |||
*[[Pseudobulbar palsy]], | |||
*[[Spastic paralysis]], | |||
*[[Spina bifida]], | |||
*[[Spinal cord injury]], | |||
*[[Subacute combined degeneration of the cord]], | |||
*[[Syringomyelia]], | |||
*[[Traumatic brain injury]], | |||
*[[Weber syndrome]], | |||
*[[X-linked sideroblastic ataxia]], | |||
===Causes by Organ System=== | |||
{|style="width:80%; height:100px" border="1" | |||
|style="height:100px"; style="width:25%" border="1" bgcolor="LightSteelBlue" |'''Cardiovascular''' | |||
|style="height:100px"; style="width:75%" border="1" bgcolor="Beige" | [[Cerebrovascular accident]], [[Stroke ]] | |||
|- | |||
|bgcolor="LightSteelBlue"| '''Chemical/Poisoning''' | |||
|bgcolor="Beige"| [[Lathyrus poisoning]] | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Dental''' | |||
|bgcolor="Beige"| No underlying causes | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Dermatologic''' | |||
|bgcolor="Beige"| No underlying causes | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Drug Side Effect''' | |||
|bgcolor="Beige"| [[Pellagra]] | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Ear Nose Throat''' | |||
|bgcolor="Beige"| No underlying causes | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Endocrine''' | |||
|bgcolor="Beige"| [[Adult polyglucosan body disease]] | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Environmental''' | |||
|bgcolor="Beige"| No underlying causes | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Gastroenterologic''' | |||
|bgcolor="Beige"| [[Adult polyglucosan body disease]] | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Genetic''' | |||
|bgcolor="Beige"| No underlying causes | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Hematologic''' | |||
|bgcolor="Beige"| [[Leukoencephalopathy ]], [[Pernicious anemia]], [[Progressive multifocal leucoencephalopathy]] | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Iatrogenic''' | |||
|bgcolor="Beige"| No underlying causes | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Infectious Disease''' | |||
|bgcolor="Beige"| [[Quaternary syphilis]] | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Musculoskeletal/Orthopedic''' | |||
|bgcolor="Beige"| [[Cervical myelopathy]], [[Cervical spondylosis]], [[Friedreich ataxia]], [[Juvenile primary lateral sclerosis]], [[Spastic paralysis]], [[Spinal cord injury]], [[Subacute combined degeneration of the cord]], [[X-linked sideroblastic ataxia]] | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Neurologic''' | |||
|bgcolor="Beige"| [[Cerebral palsy]], [[Cerebrovascular accident]], [[Cervical myelopathy]], [[Cervical spondylosis]], [[Friedreich ataxia]], [[Juvenile primary lateral sclerosis]], [[Konzo]], [[Motor neuron disease]], [[Multiple sclerosis]], [[Pseudobulbar palsy]], [[Spastic paralysis]], [[Spina bifida]], [[Spinal cord injury]], [[Subacute combined degeneration of the cord]], [[Syringomyelia]], [[Traumatic brain injury]], [[Weber syndrome]], [[X-linked sideroblastic ataxia]] | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Nutritional/Metabolic''' | |||
|bgcolor="Beige"| [[Vitamin b12 deficiency]] | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Obstetric/Gynecologic''' | |||
|bgcolor="Beige"| No underlying causes | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Oncologic''' | |||
|bgcolor="Beige"| No underlying causes | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Ophthalmologic''' | |||
|bgcolor="Beige"| No underlying causes | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Overdose/Toxicity''' | |||
|bgcolor="Beige"| No underlying causes | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Psychiatric''' | |||
|bgcolor="Beige"| No underlying causes | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Pulmonary''' | |||
|bgcolor="Beige"| No underlying causes | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Renal/Electrolyte''' | |||
|bgcolor="Beige"| No underlying causes | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Rheumatology/Immunology/Allergy''' | |||
|bgcolor="Beige"| No underlying causes | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Sexual''' | |||
|bgcolor="Beige"| [[Quaternary syphilis]] | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Trauma''' | |||
|bgcolor="Beige"| [[Traumatic brain injury]] | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Urologic''' | |||
|bgcolor="Beige"| No underlying causes | |||
|- | |||
|-bgcolor="LightSteelBlue" | |||
| '''Miscellaneous''' | |||
|bgcolor="Beige"| No underlying causes | |||
|- | |||
|} | |||
===Causes in Alphabetical Order=== | |||
{{columns-list| | |||
*[[Adult polyglucosan body disease]] | |||
*[[Cerebral palsy]] | |||
*[[Cerebrovascular accident]] | |||
*[[Cervical myelopathy]] | |||
*[[Cervical spondylosis]] | |||
*[[Friedreich ataxia]] | |||
*[[Juvenile primary lateral sclerosis]] | |||
*[[Konzo]] | |||
*[[Lathyrus poisoning]] | |||
*[[Leukoencephalopathy ]] | |||
*[[Motor neuron disease]] | |||
*[[Multiple sclerosis]] | |||
*[[Pellagra]] | |||
*[[Pernicious anemia]] | |||
*[[Progressive multifocal leucoencephalopathy]] | |||
*[[Pseudobulbar palsy]] | |||
*[[Quaternary syphilis]] | |||
*[[Spastic paralysis]] | |||
*[[Spina bifida]] | |||
*[[Spinal cord injury]] | |||
*[[Stroke ]] | |||
*[[Subacute combined degeneration of the cord]] | |||
*[[Syringomyelia]] | |||
*[[Traumatic brain injury]] | |||
*[[Vitamin b12 deficiency]] | |||
*[[Weber syndrome]] | |||
*[[X-linked sideroblastic ataxia]] | |||
}} | |||
</div> | |||
== Symptoms == | == Symptoms == | ||
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* http://www.lib.mcg.edu/edu/eshuphysio/program/section8/8ch3/s8ch3_34.htm | * http://www.lib.mcg.edu/edu/eshuphysio/program/section8/8ch3/s8ch3_34.htm | ||
[[Category:Disease]] | |||
{{WikiDoc Help Menu}} | {{WikiDoc Help Menu}} | ||
{{WikiDoc Sources}} | {{WikiDoc Sources}} | ||
Latest revision as of 23:13, 10 January 2020
Upper motor neuron lesion | |
The motor tract. |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Cafer Zorkun, M.D., Ph.D. [2] Luke Rusowicz-Orazem, B.S.
Overview
An upper motor neuron lesion is a lesion of the neural pathway above the anterior horn cell or motor nuclei of the cranial nerves. This is in contrast to a lower motor neuron lesion, which affects nerve fibers traveling from the anterior horn of the spinal cord to the relevant muscle(s).
Causes
Life Threatening Causes
- Cerebral palsy
- Cerebrovascular accident
- Cervical myelopathy
- Multiple sclerosis
- Spinal cord injury
- Stroke
- Traumatic brain injury
Common Causes
- Cerebral palsy,
- Cerebrovascular accident,
- Cervical myelopathy,
- Cervical spondylosis,
- Friedreich ataxia,
- Juvenile primary lateral sclerosis,
- Konzo,
- Motor neuron disease,
- Multiple sclerosis,
- Pseudobulbar palsy,
- Spastic paralysis,
- Spina bifida,
- Spinal cord injury,
- Subacute combined degeneration of the cord,
- Syringomyelia,
- Traumatic brain injury,
- Weber syndrome,
- X-linked sideroblastic ataxia,
Causes by Organ System
Causes in Alphabetical Order
- Adult polyglucosan body disease
- Cerebral palsy
- Cerebrovascular accident
- Cervical myelopathy
- Cervical spondylosis
- Friedreich ataxia
- Juvenile primary lateral sclerosis
- Konzo
- Lathyrus poisoning
- Leukoencephalopathy
- Motor neuron disease
- Multiple sclerosis
- Pellagra
- Pernicious anemia
- Progressive multifocal leucoencephalopathy
- Pseudobulbar palsy
- Quaternary syphilis
- Spastic paralysis
- Spina bifida
- Spinal cord injury
- Stroke
- Subacute combined degeneration of the cord
- Syringomyelia
- Traumatic brain injury
- Vitamin b12 deficiency
- Weber syndrome
- X-linked sideroblastic ataxia
Symptoms
- Spastic increase in tone in the extensor muscles (lower limbs) or flexor muscles (upper limbs)
- Clasp-knife response where initial resistance to movement is followed by relaxation
- Weakness in the flexors (lower limbs) or extensors (upper limbs),[1] but no muscle wasting
- Brisk tendon jerk reflexes
- Babinski sign positive, where the big toe is raised rather than curled downwards on stimulation of the sole of the foot
Corticospinal/pyramidal tract
These are the neural tracts which descend in the spinal cord, in the lateral columns, carrying signals for voluntary movement of skeletal muscle. These nerve fibres usually originate in the cerebral cortex, then gather in the internal capsule before crossing over to the opposite side (decussation) in the medulla oblongata and proceeding down the spinal cord to meet lower motor neurons in the anterior horn.