Congenital muscular dystrophies.

Distrofias Musculares Congénitas (DMC) Las distrofias musculares congénitas (DMC) son una variedad de miopatías hereditarias que se caracterizan por la debilidad muscular progresiva y la presencia de hallazgos distróficos en la biopsia muscular. Estas condiciones pueden manifestarse desde el nacimiento o durante la primera infancia, y están causadas por variaciones genéticas que alteran la estructura …

Patterns of neuropathic involvement.

Electromyographic Patterns of Neuropathic Affectation The electrophysiological study helps to differentiate the underlying cause of weakness by identifying whether the nerve involvement is demyelinating or axonal: Axonal Pattern: It is characterized by a marked reduction in the amplitude of motor (CMAP) and sensory (SNAP) action potentials, with normal nerve conduction velocities or only...

Dyke-Davidoff-Masson syndrome.

Transient neonatal myasthenia is a rare complication of maternal myasthenia gravis. Around 10-15% of children born to mothers with anti-acetylcholine receptor (AChR) antibodies, and less frequently anti-muscle-specific kinase (MuSK). Symptoms are usually apparent from the 3rd day of life, and in almost all cases …