Nerve injury: Difference between revisions
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{{Infobox medical condition | |||
| name = Nerve injury | |||
| image = [[File:Endoneurial_fibrosis_-_very_high_mag_-_cropped.jpg|250px]] | |||
| caption = Micrograph showing endoneurial fibrosis, a feature of chronic nerve injury. | |||
| field = [[Neurology]] | |||
| synonyms = [[Peripheral nerve injury]], [[neuropathy]] | |||
| symptoms = [[Numbness]], [[tingling]], [[muscle weakness]], [[pain]] | |||
| complications = [[Chronic pain]], [[muscle atrophy]], [[loss of function]] | |||
| onset = [[Acute]] or [[chronic]] | |||
| duration = Varies depending on severity and treatment | |||
| causes = [[Trauma]], [[compression]], [[ischemia]], [[inflammation]] | |||
| risks = [[Diabetes]], [[alcoholism]], [[autoimmune disorders]] | |||
| diagnosis = [[Clinical examination]], [[nerve conduction study]], [[electromyography]] | |||
| differential = [[Radiculopathy]], [[myopathy]], [[central nervous system disorders]] | |||
| treatment = [[Physical therapy]], [[medication]], [[surgery]] | |||
| prognosis = Depends on cause and severity | |||
| frequency = Common | |||
}} | |||
[[File:Sedon's_classification_of_nerve_injuries.jpg|Sedon's classification of nerve injuries|thumb|left]] | |||
[[File:Neuropraxia.jpg|Neuropraxia|thumb|left]] | |||
[[File:Guillain-barré_syndrome_-_Nerve_Damage.gif|Guillain-Barré syndrome - Nerve Damage|left]] | |||
[[File:Molecular_response_after_nerve_injury.png|Molecular response after nerve injury|thumb|left]] | |||
'''Nerve fascicle''' is a bundle of [[nerve]] fibers, enclosed by a layer of connective tissue known as the [[perineurium]]. It is a component of a [[nerve]], along with other fascicles and additional layers of connective tissue. | '''Nerve fascicle''' is a bundle of [[nerve]] fibers, enclosed by a layer of connective tissue known as the [[perineurium]]. It is a component of a [[nerve]], along with other fascicles and additional layers of connective tissue. | ||
==Structure== | ==Structure== | ||
Each nerve fascicle contains many [[nerve fiber]]s. These fibers are long, slender projections of [[neuron]]s, sometimes referred to as axons or nerve cells. They transmit [[electrical impulse]]s from one area of the body to another. | Each nerve fascicle contains many [[nerve fiber]]s. These fibers are long, slender projections of [[neuron]]s, sometimes referred to as axons or nerve cells. They transmit [[electrical impulse]]s from one area of the body to another. | ||
The nerve fibers within a fascicle are surrounded by a layer of connective tissue called the [[endoneurium]]. This layer provides a supportive framework for the nerve fibers, helping to maintain their structure and function. | The nerve fibers within a fascicle are surrounded by a layer of connective tissue called the [[endoneurium]]. This layer provides a supportive framework for the nerve fibers, helping to maintain their structure and function. | ||
The fascicle itself is enclosed by another layer of connective tissue, the perineurium. This layer helps to protect the nerve fibers from damage and infection. It also helps to maintain the integrity of the nerve, ensuring that the electrical impulses are transmitted efficiently. | The fascicle itself is enclosed by another layer of connective tissue, the perineurium. This layer helps to protect the nerve fibers from damage and infection. It also helps to maintain the integrity of the nerve, ensuring that the electrical impulses are transmitted efficiently. | ||
==Function== | ==Function== | ||
The primary function of a nerve fascicle is to transmit electrical impulses along the nerve fibers. These impulses carry information from one part of the body to another, enabling us to sense and respond to our environment. | The primary function of a nerve fascicle is to transmit electrical impulses along the nerve fibers. These impulses carry information from one part of the body to another, enabling us to sense and respond to our environment. | ||
For example, when you touch a hot surface, nerve fibers in your skin transmit an impulse to your brain, which interprets this as pain and triggers a response to pull your hand away. This entire process is facilitated by the structure and function of nerve fascicles. | For example, when you touch a hot surface, nerve fibers in your skin transmit an impulse to your brain, which interprets this as pain and triggers a response to pull your hand away. This entire process is facilitated by the structure and function of nerve fascicles. | ||
==Clinical significance== | ==Clinical significance== | ||
Damage or disease affecting the nerve fascicles can lead to a range of neurological disorders. For example, [[peripheral neuropathy]] is a condition in which the peripheral nerves, including the fascicles, are damaged, leading to symptoms such as pain, numbness, and weakness in the affected areas. | Damage or disease affecting the nerve fascicles can lead to a range of neurological disorders. For example, [[peripheral neuropathy]] is a condition in which the peripheral nerves, including the fascicles, are damaged, leading to symptoms such as pain, numbness, and weakness in the affected areas. | ||
[[Guillain-Barré syndrome]] is another condition that can affect the nerve fascicles. This is an autoimmune disorder in which the body's immune system mistakenly attacks the nerves, leading to weakness and numbness. | [[Guillain-Barré syndrome]] is another condition that can affect the nerve fascicles. This is an autoimmune disorder in which the body's immune system mistakenly attacks the nerves, leading to weakness and numbness. | ||
==See also== | ==See also== | ||
* [[Nervous system]] | * [[Nervous system]] | ||
| Line 23: | Line 38: | ||
* [[Peripheral neuropathy]] | * [[Peripheral neuropathy]] | ||
* [[Guillain-Barré syndrome]] | * [[Guillain-Barré syndrome]] | ||
[[Category:Anatomy]] | [[Category:Anatomy]] | ||
[[Category:Neurology]] | [[Category:Neurology]] | ||
[[Category:Neuroanatomy]] | [[Category:Neuroanatomy]] | ||
{{stub}} | {{stub}} | ||
Latest revision as of 10:14, 13 April 2025
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| Nerve injury | |
|---|---|
| |
| Synonyms | Peripheral nerve injury, neuropathy |
| Pronounce | N/A |
| Specialty | N/A |
| Symptoms | Numbness, tingling, muscle weakness, pain |
| Complications | Chronic pain, muscle atrophy, loss of function |
| Onset | Acute or chronic |
| Duration | Varies depending on severity and treatment |
| Types | N/A |
| Causes | Trauma, compression, ischemia, inflammation |
| Risks | Diabetes, alcoholism, autoimmune disorders |
| Diagnosis | Clinical examination, nerve conduction study, electromyography |
| Differential diagnosis | Radiculopathy, myopathy, central nervous system disorders |
| Prevention | N/A |
| Treatment | Physical therapy, medication, surgery |
| Medication | N/A |
| Prognosis | Depends on cause and severity |
| Frequency | Common |
| Deaths | N/A |
Nerve fascicle is a bundle of nerve fibers, enclosed by a layer of connective tissue known as the perineurium. It is a component of a nerve, along with other fascicles and additional layers of connective tissue.
Structure[edit]
Each nerve fascicle contains many nerve fibers. These fibers are long, slender projections of neurons, sometimes referred to as axons or nerve cells. They transmit electrical impulses from one area of the body to another. The nerve fibers within a fascicle are surrounded by a layer of connective tissue called the endoneurium. This layer provides a supportive framework for the nerve fibers, helping to maintain their structure and function. The fascicle itself is enclosed by another layer of connective tissue, the perineurium. This layer helps to protect the nerve fibers from damage and infection. It also helps to maintain the integrity of the nerve, ensuring that the electrical impulses are transmitted efficiently.
Function[edit]
The primary function of a nerve fascicle is to transmit electrical impulses along the nerve fibers. These impulses carry information from one part of the body to another, enabling us to sense and respond to our environment. For example, when you touch a hot surface, nerve fibers in your skin transmit an impulse to your brain, which interprets this as pain and triggers a response to pull your hand away. This entire process is facilitated by the structure and function of nerve fascicles.
Clinical significance[edit]
Damage or disease affecting the nerve fascicles can lead to a range of neurological disorders. For example, peripheral neuropathy is a condition in which the peripheral nerves, including the fascicles, are damaged, leading to symptoms such as pain, numbness, and weakness in the affected areas. Guillain-Barré syndrome is another condition that can affect the nerve fascicles. This is an autoimmune disorder in which the body's immune system mistakenly attacks the nerves, leading to weakness and numbness.
