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Related Concept Videos

Multiple Sclerosis l: Introduction01:19

Multiple Sclerosis l: Introduction

Multiple sclerosis is a chronic autoimmune disease of the central nervous system (CNS) that affects the brain, spinal cord, and optic nerves. It is an inflammatory demyelinating disorder and a leading cause of neurological disability in young adults.EpidemiologyMS commonly begins between 20 and 40 years of age and is twice as common in women. Its exact cause remains unclear, but genetic susceptibility contributes, with higher risk in first-degree relatives and identical twins. A greater...
Secondary Spinal Cord Injury llI: Pathophysiology01:25

Secondary Spinal Cord Injury llI: Pathophysiology

Early Ischemia and Ionic ImbalanceWithin minutes of spinal cord injury, a secondary cascade begins, progressing over hours to weeks. Vascular damage reduces blood flow, causing ischemia and mitochondrial dysfunction. ATP depletion leads to ion pump failure, membrane depolarization, sodium influx, potassium efflux, and water accumulation, resulting in cellular swelling. Increased intracellular calcium further disrupts mitochondria and accelerates cellular injury.Excitotoxicity and Neuronal...
Tumor Progression02:07

Tumor Progression

Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
Alterations in Muscle Tone ll01:12

Alterations in Muscle Tone ll

Alterations in muscle tone are common manifestations of neurological disorders and reflect dysfunction within different nervous system regions. Spasticity, paratonia, and dystonia represent distinct forms of hypertonia, each with unique mechanisms, clinical features, and diagnostic importance.CharacteristicsSpasticity happens from upper motor neuron lesions and is characterized by velocity-dependent resistance to passive movement. Clinical features include:Exaggerated deep tendon reflexesClonus...
Myasthenia Gravis ll: Pathophysiology01:22

Myasthenia Gravis ll: Pathophysiology

The disease process of myasthenia gravis begins at the neuromuscular junction, where antibodies attack key proteins needed for muscle activation. This immune reaction weakens signal transmission, leading to the characteristic muscle fatigue and weakness that define the condition.Immune-Mediated DamageIn most individuals, antibodies target acetylcholine receptors (AChRs) on the postsynaptic membrane of muscle cells. By blocking acetylcholine binding, these antibodies prevent the nerve signal...
Spinal Cord Injury ll: Pathophysiology01:14

Spinal Cord Injury ll: Pathophysiology

Spinal cord injury progresses through two interconnected phases: primary injury and secondary injury.Primary InjuryPrimary injury happens at the moment of trauma and involves immediate mechanical damage to the spinal cord.Compression happens when broken vertebrae, herniated discs, or accumulating blood (such as a hematoma) press directly against the spinal cord, distorting its normal shape and function. In cases of contusion, the cord is bruised by a blunt force (like penetrating injuries or...

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Related Experiment Video

Updated: Jun 23, 2026

The Multiple Sclerosis Performance Test (MSPT): An iPad-Based Disability Assessment Tool
11:35

The Multiple Sclerosis Performance Test (MSPT): An iPad-Based Disability Assessment Tool

Published on: June 30, 2014

Parity and secondary progression in multiple sclerosis.

M Koch1, M Uyttenboogaart, D Heersema

  • 1Department of Neurology, University Medical Center Groningen, Postbus 30.001, 9700RB Groningen, The Netherlands. m.w.koch@neuro.umcg.nl

Journal of Neurology, Neurosurgery, and Psychiatry
|May 19, 2009
PubMed
Summary

Pregnancy and childbirth (parity) do not appear to influence the risk of secondary progression in multiple sclerosis (MS). Disease duration and immunomodulatory treatments were associated with secondary progression in women with MS.

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Last Updated: Jun 23, 2026

The Multiple Sclerosis Performance Test (MSPT): An iPad-Based Disability Assessment Tool
11:35

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Published on: June 30, 2014

Adapted Resistance Training Improves Strength in Eight Weeks in Individuals with Multiple Sclerosis
08:48

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Published on: January 29, 2016

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08:11

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Published on: November 14, 2016

Area of Science:

  • Neurology
  • Reproductive Health
  • Epidemiology

Background:

  • Pregnancy's impact on multiple sclerosis (MS) relapses is known, but its effect on secondary progression is unclear.
  • Secondary progression in MS signifies a worsening of disability independent of relapses.

Purpose of the Study:

  • To examine the relationship between the number of childbirths (parity) and the risk of developing secondary progression in women diagnosed with MS.

Main Methods:

  • A hospital-based cohort study included 277 women with MS.
  • Multivariable logistic regression analysis was employed to assess the association, controlling for potential confounding factors.

Main Results:

  • Parity was not found to be an independent predictor of secondary progression in MS.
  • Increased disease duration (OR 1.05 per year) and the use of immunomodulatory treatments (OR 0.23) were independently associated with secondary progression.

Conclusions:

  • This study found no evidence that parity affects the risk of secondary progression in multiple sclerosis.
  • Further population-based research is recommended to understand pregnancy and childbirth's long-term effects on MS prognosis.