Classification and evaluation of myoclonus - UpToDate
Sep 10, 2024 · In addition to the clinical and etiologic classification discussed below, myoclonus can be classified by the localization of the physiologic mechanism that generates it (table 1). The categories are cortical, cortical-subcortical, subcortical-nonsegmental, segmental, and peripheral.
Myoclonus - StatPearls - NCBI Bookshelf
Mar 3, 2020 · Segmental myoclonus refers to myoclonus arising in and limited to 1-3 contiguous segments of the brainstem or spinal cord. Discharges are often persistent and are not usually impacted by the level of consciousness, motor activity, stimuli, or other exogenous factors.
Myoclonic disorders: a practical approach for diagnosis and …
Segmental subcortical myoclonus–palatal myoclonus. Palatal myoclonus is a type of segmental brainstem myoclonus, although it is considered by some authors as a form of tremor [Deuschl et al. 1994]. It consists of rhythmic (1–2 Hz) contractions of the soft palate, presumably due to a dysfunction (essential palatal myoclonus [EPM]) or a ...
Myoclonus - Symptoms and causes - Mayo Clinic
Jan 13, 2023 · Essential myoclonus occurs on its own, usually without other symptoms and without being related to any underlying illness. The cause of essential myoclonus is often unknown. In some cases, the cause is hereditary, meaning passed down in families.
Spinal-generated movement disorders: a clinical review
Dec 24, 2015 · Spinal-generated movement disorders (SGMDs) include spinal segmental myoclonus, propriospinal myoclonus, orthostatic tremor, secondary paroxysmal dyskinesias, stiff person syndrome and its variants, movements in brain …
Myoclonus - Myoclonus - MSD Manual Professional Edition
Spinal segmental myoclonus refers to myoclonus in spinal muscles of one or several contiguous segments of the spinal cord. Propriospinal myoclonus is characterized by slowly propagated movements that spare the face, often with a burst duration incompatible with …
Myoclonus - National Institute of Neurological Disorders and Stroke
It can involve muscle groups controlled by one or more connected parts of the spinal cord, called segmental myoclonus. Sometimes, the myoclonic jerk involves the whole torso, beginning in the middle of the spine and spreading up and down.
Spinal segmental myoclonus as an unusual presentation of …
Segmental myoclonus refers to involuntary brief rhythmic contraction of group of muscles supplied by one or more contiguous segments either in the brainstem or the spine (spinal segmental myoclonus) [1]. Spinal myoclonus can be caused by trauma, spondylosis, tumors, infections, myelitis, or ischemia [1, 2].
Myoclonus: Differential diagnosis and current management
Segmental myoclonus is characterized by jerks limited to the muscles corresponding to one or just contiguous spinal or brainstem segments but may sometimes occur bilaterally. Jerks are usually unaffected by motor activity, sensory stimuli, or state of consciousness (persisting in sleep).
Segmental Myoclonus - Hyperkinetic Movement Disorders
Types of segmental myoclonus include palatal, brachial, oculofacialmasticatory myorhythmia, spinal, diaphragmatic, and abdominal/truncal. The diagnosis of segmental myoclonus is important since it is often attributable to a lesion along the craniospinal neuraxis.