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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...
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The myelin sheath is a multilayered lipid and protein covering that insulates the axon of a neuron, enhancing the speed of nerve impulse conduction. Axons without this sheath are referred to as unmyelinated. Two types of neuroglia, Schwann cells in the peripheral nervous system (PNS) and oligodendrocytes in the central nervous system (CNS) are responsible for producing myelin sheaths.
Schwann cells begin to form myelin sheaths around axons during fetal development. They wrap around a small...

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Updated: Jun 3, 2026

Comprehensive Autopsy Program for Individuals with Multiple Sclerosis
09:41

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Published on: July 19, 2019

Inner Plexiform Layer Microstructure Is Altered in Multiple Sclerosis.

Maria Emfietzoglou1, Victor S M C Correa1, Gustavo Sakuno1

  • 1Department of Ophthalmology, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts, United States.

Investigative Ophthalmology & Visual Science
|June 2, 2026
PubMed
Summary
This summary is machine-generated.

Microstructural changes in the inner plexiform layer (IPL) are present in multiple sclerosis (MS) and can be detected using optical coherence tomography (OCT). These IPL alterations offer improved discrimination of MS compared to current retinal thickness metrics.

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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Medical Imaging

Background:

  • Optical coherence tomography (OCT) is crucial for assessing retinal nerve fiber layer (RNFL) and ganglion cell complex (GCC) thinning in multiple sclerosis (MS).
  • Standard OCT thickness metrics may not fully capture microstructural changes within the inner plexiform layer (IPL), a critical synaptic region.
  • Investigating IPL microstructure offers potential for novel diagnostic markers in MS.

Purpose of the Study:

  • To determine if inner plexiform layer (IPL) microstructure differs in individuals with multiple sclerosis (MS).
  • To ascertain if observed IPL abnormalities in MS are independent of optic neuritis and general inner retinal thinning.
  • To evaluate if IPL microstructure metrics enhance the diagnostic discrimination of MS beyond traditional RNFL and GCC thickness measurements.

Main Methods:

  • A cross-sectional case-control study involving 49 MS patients (92 eyes) and 59 controls (109 eyes).
  • Quantification of inner plexiform layer (IPL) reflectivity and sublayer patterns using optical coherence tomography (OCT).
  • Statistical analysis employed mixed-effects models with adjustments for RNFL/GCC thickness and receiver operating characteristic (ROC) curve analysis for diagnostic discrimination.

Main Results:

  • The percentage of IPL segments showing a distinct five-sublayer pattern was significantly lower in MS patients (-20 percentage points).
  • MS eyes exhibited increased outer hyporeflective sublayer intensity and reduced contrast between the middle hyperreflective and outer hyporeflective sublayers.
  • These IPL microstructural differences were evident even in MS eyes without optic neuritis and remained significant after adjusting for RNFL and GCC thickness. The IPL sublayer pattern effectively discriminated MS from controls (AUC=0.81).

Conclusions:

  • Inner plexiform layer (IPL) microstructure is altered in multiple sclerosis (MS), independent of optic neuritis and inner retinal thinning.
  • Quantitative OCT assessment of IPL microstructure provides valuable complementary structural information for MS.
  • IPL microstructure analysis may serve as a sensitive biomarker for detecting MS-related retinal changes.