scholarly journals Altered Local Brain Amplitude of Fluctuations in Patients With Myotonic Dystrophy Type 1

2021 ◽  
Vol 13 ◽  
Author(s):  
Pei Huang ◽  
Xing-Hua Luan ◽  
Zhou Xie ◽  
Meng-Ting Li ◽  
Sheng-Di Chen ◽  
...  
Keyword(s):  
Myotonic Dystrophy ◽  
Brain Activity ◽  
Low Frequency ◽  
Anterior Cingulate ◽  
Angular Gyrus ◽  
Myotonic Dystrophy Type 1 ◽  
Myotonic Dystrophy Type ◽  
Spontaneous Brain Activity ◽  
Frequency Fluctuations

This study is aimed at investigating the characteristics of the spontaneous brain activity in patients with myotonic dystrophy type 1 (DM1). A total of 18 patients with DM1 and 18 healthy controls (HCs) were examined by resting-state functional MRI. Combined methods include amplitude of low-frequency fluctuations (ALFFs), the fractional amplitude of low-frequency fluctuations (fALFFs), and Wavelet transform-based ALFFs (Wavelet-ALFFs) with standardization, percent amplitude of fluctuation (PerAF) with/without standardization were applied to evaluate the spontaneous brain activity of patients with DM1. Compared with HCs, patients with DM1 showed decreased ALFFs and Wavelet-ALFFs in the bilateral precuneus (PCUN), angular gyrus (ANG), inferior parietal, but supramarginal and angular gyri (IPL), posterior cingulate gyrus (PCG), superior frontal gyrus, medial (SFGmed), middle occipital gyrus (MOG), which were mainly distributed in the brain regions of default mode network (DMN). Decreased ALFFs and Wavelet-ALFFs were also seen in bilateral middle frontal gyrus (MFG), inferior frontal gyrus, opercular part (IFGoperc), which were the main components of the executive control network (ECN). Patients with DM1 also showed decreased fALFFs in SFGmed.R, the right anterior cingulate and paracingulate gyri (ACGR), bilateral MFG. Reduced PerAF in bilateral PCUN, ANG, PCG, MOG, and IPLL as well as decreased PerAF without standardization in PCUNR and bilateral PCG also existed in patients with DM1. In conclusion, patients with DM1 had decreased activity in DMN and ECN with increased fluctuations in the temporal cortex and cerebellum. Decreased brain activity in DMN was the most repeatable and reliable with PCUN and PCG being the most specific imaging biomarker of brain dysfunction in patients with DM1.

SEVERE CONGENITAL MYOTONIC DYSTROPHY TYPE 1

2018 ◽  
Vol 97 (1) ◽  
pp. 78-81
Author(s):  
E.A. Mamaeva ◽  
◽  
L.A. Fedorova ◽  
S.E. Voronovich ◽  
V.D. Nazarov ◽  
...  
Keyword(s):  
Myotonic Dystrophy ◽  
Myotonic Dystrophy Type 1 ◽  
Myotonic Dystrophy Type ◽  
Congenital Myotonic Dystrophy

scholarly journals What Happened with Muscle Force, Dynamic Stability And Falls?- a 10-Year Longitudinal Follow-Up in Adults with Myotonic Dystrophy Type 1

2021 ◽  
pp. 1-10
Author(s):  
Elisabet Hammarén ◽  
Lena Kollén
Keyword(s):  
Myotonic Dystrophy ◽  
Dynamic Stability ◽  
Muscle Force ◽  
Step Test ◽  
Maximum Speed ◽  
Myotonic Dystrophy Type 1 ◽  
Myotonic Dystrophy Type ◽  
Patient Reported ◽  
Leg Muscle

Background: Individuals with myotonic dystrophy type 1 (DM1) are known to stumble and fall, but knowledge is scarce regarding dynamic stability in this disorder. Objective: To describe disease progress regarding muscle force, dynamic stability and patient reported unintentional falls during a ten-year period, in individuals with DM1. Methods: Quantification of isometric muscle force in four leg muscle groups and assessment of Timed 10-meter-walk in maximum speed (T10max), Timed Up&Go (TUG) and Step test (STEP) were performed at three occasions in a DM1 cohort, together with self-reported falls. Results: Thirty-four people (m/f:11/23, age:50.2 + /–9.4) participated. The muscle force loss after ten years was large in the distal ankle muscles. A steeper force decrease was seen in most muscles between year five and ten compared to the former five-year period. Males reported more falls than females, 91%vs 35%had fallen last year. A positive correlation, ρ= 0.633, p <  0.001, was shown between walking time (T10max) and number of falls. Frequent fallers were only seen among those with slower walk (T10max >  10seconds), and fewer steps in the STEP test (STEP≤5 steps). Conclusions: A diminishing leg muscle strength and worse dynamic stability were seen in the group, with a steeper decrease in the latter five years. Weak ankle dorsiflexors, a slower walk and difficulties to lift the forefoot were related to frequent falls.

scholarly journals Cognitive Deficits Associated with Sleep Apnea in Myotonic Dystrophy Type 1

2014 ◽  
Vol 1 (1) ◽  
pp. 95-98 ◽  
Author(s):  
Benjamin Gallais ◽  
Cynthia Gagnon ◽  
Jean Mathieu ◽  
Louis Richer ◽  
Stéphane Jean ◽  
...  
Keyword(s):  
Sleep Apnea ◽  
Myotonic Dystrophy ◽  
Cognitive Deficits ◽  
Myotonic Dystrophy Type 1 ◽  
Myotonic Dystrophy Type
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