Amyotonia Apr 2026

Below is a guide to understanding the condition, its modern classifications, and management. 1. Understanding the Condition

, historically often referred to as amyotonia congenita , is a medical term used to describe a profound lack of muscle tone (hypotonia) present from birth. While once used as a specific diagnosis, it is now considered a clinical symptom associated with several neuromuscular disorders, most notably Spinal Muscular Atrophy (SMA) . amyotonia

Infants with amyotonia often appear limp, have difficulty holding their heads up, and may show a "frog-leg" posture when lying on their backs. Below is a guide to understanding the condition,

Amyotonia is characterized by "floppy" muscles that lack the normal tension required for movement and posture. While once used as a specific diagnosis, it

Most cases historically labeled as "amyotonia congenita" are now recognized as Spinal Muscular Atrophy Type 1 (Werdnig-Hoffmann disease). 2. Common Causes